diff --git a/.github/workflows/stale.yml b/.github/workflows/stale.yml
index ad9a89721..873c9d0ba 100644
--- a/.github/workflows/stale.yml
+++ b/.github/workflows/stale.yml
@@ -1,18 +1,18 @@
-name: 'Close stale issues and PR'
+name: Close stale issues and PR
 on:
   schedule:
-    - cron: '30 1 * * *'
+  - cron: 30 1 * * *
 
 jobs:
   stale:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/stale@v3
-        with:
-          repo-token: ${{ secrets.GITHUB_TOKEN }}
-          stale-pr-message: 'This pull request will be closed in 14 days due to six months of inactivity unless the stale label or comment is removed.'
-          close-pr-message: 'This pull request was closed because it has had no activity for the past six months.'
-          days-before-pr-stale: 180
-          days-before-pr-close: 15
+    - uses: actions/stale@v3
+      with:
+        repo-token: ${{ secrets.GITHUB_TOKEN }}
+        stale-pr-message: This pull request will be closed in 14 days due to six months of inactivity unless the stale label or comment is removed.
+        close-pr-message: This pull request was closed because it has had no activity for the past six months.
+        days-before-pr-stale: 180
+        days-before-pr-close: 15
           # never close issues
-          days-before-close: -1
+        days-before-close: -1
diff --git a/.github/workflows/testing.yml b/.github/workflows/testing.yml
index a56ba59be..9fc2d1653 100644
--- a/.github/workflows/testing.yml
+++ b/.github/workflows/testing.yml
@@ -117,7 +117,7 @@ jobs:
     - name: Install language-pack-fr and tzdata
       run: sudo apt-get install graphviz pandoc
     - name: Build documentation
-      run: tox -e build_docs_nitpicky -- -q
+      run: tox -e build_docs -- -q
   codespell:
     name: codespell
     runs-on: ubuntu-latest
diff --git a/.gitignore b/.gitignore
index 44c5cf62c..dd222538c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -70,6 +70,7 @@ instance/
 
 # Sphinx documentation
 docs/_build/
+docs/api
 
 # PyBuilder
 target/
diff --git a/.readthedocs.yaml b/.readthedocs.yaml
new file mode 100644
index 000000000..d8c9bc431
--- /dev/null
+++ b/.readthedocs.yaml
@@ -0,0 +1,13 @@
+version: 2
+
+formats:
+- htmlzip
+
+python:
+  version: '3.8'
+  install:
+  - requirements: requirements/install.txt
+  - requirements: requirements/docs.txt
+  - method: setuptools
+    path: .
+  system_packages: true
diff --git a/.readthedocs.yml b/.readthedocs.yml
deleted file mode 100644
index 215f29974..000000000
--- a/.readthedocs.yml
+++ /dev/null
@@ -1,11 +0,0 @@
-version: 2
-
-formats: all
-
-python:
-  version: 3.8
-  install:
-    - requirements: docs/requirements.txt
-    - method: setuptools
-      path: .
-  system_packages: true
diff --git a/docs/_links.rst b/docs/_links.rst
new file mode 100644
index 000000000..24aaf042d
--- /dev/null
+++ b/docs/_links.rst
@@ -0,0 +1,25 @@
+.. _Astropy: https://www.astropy.org
+.. _BibTeX format: https://www.bibtex.com/g/bibtex-format
+.. _BibTeX: http://www.bibtex.org
+.. _conda: https://docs.conda.io
+.. _git: https://git-scm.com
+.. _Hinode: https://www.nasa.gov/mission_pages/hinode/index.html
+.. _Jupyter: https://jupyter.org
+.. _matplotlib: https://matplotlib.org
+.. _NumPy: https://numpy.org
+.. _pip: https://pip.pypa.io
+.. _pre-commit: https://pre-commit.com
+.. _PyPI: https://pypi.org
+.. _pytest: https://docs.pytest.org
+.. _Python: https://www.python.org
+.. _Read the Docs: https://readthedocs.org
+.. _SciPy: https://scipy.org
+.. _SolarSoft IDL: https://www.lmsal.com/solarsoft
+.. _Sphinx: https://www.sphinx-doc.org
+.. _SunPy: https://docs.sunpy.org/en/stable
+.. _tox: https://tox.wiki/en/latest
+.. _X-Ray Telescope: https://xrt.cfa.harvard.edu
+.. _XRT: https://xrt.cfa.harvard.edu/
+.. _XRTpy's documentation: https://xrtpy.readthedocs.io/en/latest
+.. _XRTpy's GitHub repository: https://github.com/HinodeXRT/xrtpy
+.. _Zenodo: https://zenodo.org
diff --git a/docs/_static/css/admonition_color_contrast.css b/docs/_static/css/admonition_color_contrast.css
new file mode 100644
index 000000000..f91be52be
--- /dev/null
+++ b/docs/_static/css/admonition_color_contrast.css
@@ -0,0 +1,144 @@
+/*
+  The following sections were adapted from the file
+  sphinx_rtd_theme_ext_color_contrast/_static/sphinx_rtd_theme_ext_color_contrast.css
+  in the following repository:
+  https://github.com/AaltoSciComp/sphinx_rtd_theme_ext_color_contrast
+  The license is in our licenses directory.
+
+  These customizations will be able to be removed if sphinx_rtd_theme
+  defaults end up getting changed to meet accessibility guidelines.
+*/
+
+
+/* warning */
+.wy-alert.wy-alert-warning .wy-alert-title,
+.rst-content .wy-alert-warning.note .wy-alert-title,
+.rst-content .attention .wy-alert-title,
+.rst-content .caution .wy-alert-title,
+.rst-content .wy-alert-warning.danger .wy-alert-title,
+.rst-content .wy-alert-warning.error .wy-alert-title,
+.rst-content .wy-alert-warning.hint .wy-alert-title,
+.rst-content .wy-alert-warning.important .wy-alert-title,
+.rst-content .wy-alert-warning.tip .wy-alert-title,
+.rst-content .warning .wy-alert-title,
+.rst-content .wy-alert-warning.seealso .wy-alert-title,
+.rst-content .admonition-todo .wy-alert-title,
+.rst-content .wy-alert-warning.admonition .wy-alert-title,
+.wy-alert.wy-alert-warning .rst-content .admonition-title,
+.rst-content .wy-alert.wy-alert-warning .admonition-title,
+.rst-content .wy-alert-warning.note .admonition-title,
+.rst-content .attention .admonition-title,
+.rst-content .caution .admonition-title,
+.rst-content .wy-alert-warning.danger .admonition-title,
+.rst-content .wy-alert-warning.error .admonition-title,
+.rst-content .wy-alert-warning.hint .admonition-title,
+.rst-content .wy-alert-warning.important .admonition-title,
+.rst-content .wy-alert-warning.tip .admonition-title,
+.rst-content .warning .admonition-title, .rst-content
+.wy-alert-warning.seealso .admonition-title,
+.rst-content .admonition-todo .admonition-title,
+.rst-content .wy-alert-warning.admonition .admonition-title {
+    background: #B15E16;
+}
+
+/* important */
+
+.wy-alert.wy-alert-success .wy-alert-title,
+.rst-content .wy-alert-success.note .wy-alert-title,
+.rst-content .wy-alert-success.attention .wy-alert-title,
+.rst-content .wy-alert-success.caution .wy-alert-title,
+.rst-content .wy-alert-success.danger .wy-alert-title,
+.rst-content .wy-alert-success.error .wy-alert-title,
+.rst-content .hint .wy-alert-title,
+.rst-content .important .wy-alert-title,
+.rst-content .tip .wy-alert-title,
+.rst-content .wy-alert-success.warning .wy-alert-title,
+.rst-content .wy-alert-success.seealso .wy-alert-title,
+.rst-content .wy-alert-success.admonition-todo .wy-alert-title,
+.rst-content .wy-alert-success.admonition .wy-alert-title,
+.wy-alert.wy-alert-success .rst-content .admonition-title,
+.rst-content .wy-alert.wy-alert-success .admonition-title,
+.rst-content .wy-alert-success.note .admonition-title,
+.rst-content .wy-alert-success.attention .admonition-title,
+.rst-content .wy-alert-success.caution .admonition-title,
+.rst-content .wy-alert-success.danger .admonition-title,
+.rst-content .wy-alert-success.error .admonition-title,
+.rst-content .hint .admonition-title,
+.rst-content .important .admonition-title,
+.rst-content .tip .admonition-title,
+.rst-content .wy-alert-success.warning .admonition-title,
+.rst-content .wy-alert-success.seealso .admonition-title,
+.rst-content .wy-alert-success.admonition-todo .admonition-title,
+.rst-content .wy-alert-success.admonition .admonition-title {
+    background: #12826C;
+}
+
+/* seealso, note, etc */
+
+.wy-alert.wy-alert-info .wy-alert-title,
+.rst-content .note .wy-alert-title,
+.rst-content .wy-alert-info.attention .wy-alert-title,
+.rst-content .wy-alert-info.caution .wy-alert-title,
+.rst-content .wy-alert-info.danger .wy-alert-title,
+.rst-content .wy-alert-info.error .wy-alert-title,
+.rst-content .wy-alert-info.hint .wy-alert-title,
+.rst-content .wy-alert-info.important .wy-alert-title,
+.rst-content .wy-alert-info.tip .wy-alert-title,
+.rst-content .wy-alert-info.warning .wy-alert-title,
+.rst-content .seealso .wy-alert-title,
+.rst-content .wy-alert-info.admonition-todo .wy-alert-title,
+.rst-content .wy-alert-info.admonition .wy-alert-title,
+.wy-alert.wy-alert-info .rst-content .admonition-title,
+.rst-content .wy-alert.wy-alert-info .admonition-title,
+.rst-content .note .admonition-title,
+.rst-content .wy-alert-info.attention .admonition-title,
+.rst-content .wy-alert-info.caution .admonition-title,
+.rst-content .wy-alert-info.danger .admonition-title,
+.rst-content .wy-alert-info.error .admonition-title,
+.rst-content .wy-alert-info.hint .admonition-title,
+.rst-content .wy-alert-info.important .admonition-title,
+.rst-content .wy-alert-info.tip .admonition-title,
+.rst-content .wy-alert-info.warning .admonition-title,
+.rst-content .seealso .admonition-title,
+.rst-content .wy-alert-info.admonition-todo .admonition-title,
+.rst-content .wy-alert-info.admonition .admonition-title {
+    background: #277CB4;
+}
+
+/* error, danger */
+
+.rst-content .danger .admonition-title,
+.rst-content .danger .wy-alert-title,
+.rst-content .error .admonition-title,
+.rst-content .error .wy-alert-title,
+.rst-content .wy-alert-danger.admonition-todo .admonition-title,
+.rst-content .wy-alert-danger.admonition-todo .wy-alert-title,
+.rst-content .wy-alert-danger.admonition .admonition-title,
+.rst-content .wy-alert-danger.admonition .wy-alert-title,
+.rst-content .wy-alert-danger.attention .admonition-title,
+.rst-content .wy-alert-danger.attention .wy-alert-title,
+.rst-content .wy-alert-danger.caution .admonition-title,
+.rst-content .wy-alert-danger.caution .wy-alert-title,
+.rst-content .wy-alert-danger.hint .admonition-title,
+.rst-content .wy-alert-danger.hint .wy-alert-title,
+.rst-content .wy-alert-danger.important .admonition-title,
+.rst-content .wy-alert-danger.important .wy-alert-title,
+.rst-content .wy-alert-danger.note .admonition-title,
+.rst-content .wy-alert-danger.note .wy-alert-title,
+.rst-content .wy-alert-danger.seealso .admonition-title,
+.rst-content .wy-alert-danger.seealso .wy-alert-title,
+.rst-content .wy-alert-danger.tip .admonition-title,
+.rst-content .wy-alert-danger.tip .wy-alert-title,
+.rst-content .wy-alert-danger.warning .admonition-title,
+.rst-content .wy-alert-danger.warning .wy-alert-title,
+.rst-content .wy-alert.wy-alert-danger .admonition-title,
+.wy-alert.wy-alert-danger .rst-content .admonition-title,
+.wy-alert.wy-alert-danger .wy-alert-title {
+    background: #e31704;
+}
+
+/* Generic admonition titles */
+
+.wy-alert-title, .rst-content .admonition-title {
+    background: #277CB4;
+}
diff --git a/docs/_static/css/plasmapy.css b/docs/_static/css/plasmapy.css
new file mode 100644
index 000000000..b59e85f70
--- /dev/null
+++ b/docs/_static/css/plasmapy.css
@@ -0,0 +1,186 @@
+/*
+  This file contains styles rules for PlasmaPy's documentation, which
+  includes new rules as well as rules that override styles from the
+  Sphinx Read the Docs theme (sphinx_rtd_theme).
+
+  The CSS style rule syntax is:
+
+    selectors-list {
+      properties-list
+    }
+
+  The code in selectors-list selects the patterns for the elements to be
+  styled. The code in properties-list sets the style of these elements.
+  The CSS rule to be applied is generally the one that has the most
+  specific selectors.
+
+  For more information on CSS, go to: https://www.w3schools.com/css
+
+  Most web browsers have inspection tools that help with adding new CSS
+  rules. Right-click or ctrl-click on an element of a website, and
+  choose "inspect" to see the HTML code along with CSS selectors and
+  properties.
+
+  When creating a new rule, use increased specificity instead of
+  !important when possible. Using !important can make debugging more
+  difficult. Use relative units like rem (root font size) to help with
+  accessibility and scaling. Please add descriptive comments for new
+  rules that are understandable to someone who is unfamiliar with CSS.
+
+  CSS files can be validated at: https://jigsaw.w3.org/css-validator
+*/
+
+/* -----------------------------------------------------------------------------
+ * RTD Overrides
+ */
+
+/* Style for toctree in a table */
+td .toctree-wrapper ul {
+    font-size: 16px;
+    line-height: 18px !important;
+    list-style: none !important;
+    margin-bottom: 0 !important;
+}
+
+td .toctree-wrapper ul li {
+    list-style: none !important;
+    margin-left: 0 !important;
+}
+
+/* Unordered list nested in ordered list */
+.section li ul {
+    margin-bottom: 12px !important;
+}
+
+/* Add margin-bottom to inheritance diagrams */
+div.graphviz {
+    margin-bottom: 24px !important;
+}
+
+/*
+ * Remove bottom margin for the autosummary table in a directive:option::
+ * section
+ */
+.rst-content dl.rst table p,
+.rst-content dl.std table p,
+.rst-content dl.py table p {
+    margin-bottom: 0 !important;
+}
+
+/* Remove excess bottom margin for table headings */
+.rst-content table.docutils thead p {
+    margin-bottom: 0;
+}
+
+/* Remove excess bottom margin for for multiline table entries when using line-block */
+.rst-content table.docutils div.line-block {
+    margin-bottom: 0;
+}
+
+/* Allow text wrapping for last column of a table. */
+.rst-content table.docutils td:last-child p {
+    white-space: normal;
+    line-height: 140%;
+}
+
+/* Reduce top/bottom margin for equations in tables */
+table div.MathJax_Display {
+    margin: 0.5em 0;
+}
+
+/*
+ * Adjustments to the Glossary styling
+ */
+dl.glossary dd ul {
+    margin-bottom: 12px !important;
+}
+dl.glossary dd {
+    margin-top: 4px;
+    margin-bottom: 18px;
+}
+dl.glossary dt {
+    margin-bottom: 2px;
+}
+
+/* Styles for text in the footer chosen to improve contrast. */
+
+footer p {
+    color: #141414;
+}
+
+/*
+  Styles for hyperlinks. The colors must meet the WCAG AA standard
+  for contrast. Link colors can be tested for accessibility at:
+  https://webaim.org/resources/linkcontrastchecker
+*/
+
+div.wy-nav-content a:link {
+    color: #0069d6;
+}
+div.wy-nav-content a:visited  {
+    color: #9151b6;
+}
+div.wy-nav-content a:hover {
+    text-decoration:underline;
+}
+
+/*
+  The style for generic code literals, in particular text that is
+  enclosed in double back ticks in reST (e.g., ``make -j 32``).
+*/
+
+div.wy-nav-content .rst-content code.literal {
+    background-color: #f6f6f6;
+    color: #db2424;
+}
+
+/*
+  The style for links to Python objects, in particular text enclosed in
+  single back ticks in reST (e.g., `~plasmapy.particles`).
+*/
+
+div.wy-nav-content .rst-content code.literal.xref {
+    color: #0069d6;
+    font-weight: bold;
+}
+
+/*
+  The style for literal text that shows the location of a file, in
+  particular when used by the reST role :file: (e.g.,
+  :file:`docs/_static/css/plasmapy.css`).
+*/
+div.wy-nav-content .rst-content code.literal.file {
+    color: #b84d00;
+    background-color: #F9F1F0;
+}
+
+/* -----------------------------------------------------------------------------
+ * RTD layout styling additions
+ */
+
+/* Style for module/index links in sidebar below the search field. */
+div.pkgnav {
+    color: white;
+    font-size: 1em;
+    margin-top: 12px;
+    text-align: center;
+}
+
+div.pkgnav ul {
+    list-style: none;
+}
+
+div.pkgnav ul li {
+    display: inline;
+}
+
+div.pkgnav ul li a {
+    color: #f9f9f0;
+    margin: 0;
+    text-shadow: 0 0 1px rgba(0, 0, 0, 0.5);
+}
+
+div.pkgnav ul li a:hover {
+    color: #f50404;
+    text-shadow: 0 0 1px rgba(255, 255, 255, 0.5);
+}
diff --git a/docs/_substitutions.rst b/docs/_substitutions.rst
new file mode 100644
index 000000000..1e570ffe0
--- /dev/null
+++ b/docs/_substitutions.rst
@@ -0,0 +1,40 @@
+.. |bibliography| replace:: :ref:`bibliography`\
+.. |glossary| replace:: :ref:`glossary`\
+.. |inf| replace:: `~numpy.inf`
+.. |minpython| replace:: 3.8
+.. |nan| replace:: `~numpy.nan`
+.. |ndarray| replace:: :class:`~numpy.ndarray`
+.. |Quantity| replace:: :class:`~astropy.units.Quantity`
+.. |TimeDelta| replace:: :class:`~astropy.time.TimeDelta`
+.. |Time| replace:: :class:`~astropy.time.Time`
+
+.. A workaround for nested inline literals so that the filename will get
+   formatted like a file but will be a link. In the text, these get used
+   with the syntax for a substitution followed by an underscore to
+   indicate that it's for a link: |docs/_static|_
+
+.. For these workarounds, if the replacement is something in single back
+   ticks (e.g., `xarray`), then it should also be added to
+   nitpick_ignore_regex in docs/conf.py so that it doesn't get counted
+   as an error in a nitpicky doc build (e.g., tox -e doc_build_nitpicky).
+
+.. _`docs/_static`: https://github.com/PlasmaPy/PlasmaPy/tree/main/docs/_static
+.. |docs/_static| replace:: :file:`docs/_static`
+
+.. _`docs/_static/css`: https://github.com/PlasmaPy/PlasmaPy/tree/main/docs/_static/css
+.. |docs/_static/css| replace:: :file:`docs/_static/css`
+
+.. _`docs/api_static`: https://github.com/PlasmaPy/PlasmaPy/tree/main/docs/api_static
+.. |docs/api_static| replace:: :file:`docs/api_static`
+
+.. _`docs/conf.py`: https://github.com/PlasmaPy/PlasmaPy/blob/main/docs/conf.py
+.. |docs/conf.py| replace:: :file:`docs/conf.py`
+
+.. _`docs/glossary.rst`: https://github.com/PlasmaPy/PlasmaPy/blob/main/docs/glossary.rst
+.. |docs/glossary.rst| replace:: :file:`docs/glossary.rst`
+
+.. _`docs/bibliography.bib`: https://github.com/PlasmaPy/PlasmaPy/blob/main/docs/bibliography.bib
+.. |docs/bibliography.bib| replace:: :file:`docs/bibliography.bib`
+
+.. _`setup.cfg`: https://github.com/PlasmaPy/PlasmaPy/blob/main/setup.cfg
+.. |setup.cfg| replace:: :file:`setup.cfg`
diff --git a/docs/api_static/xrtpy.response.channel.rst b/docs/api_static/xrtpy.response.channel.rst
new file mode 100644
index 000000000..be53692bd
--- /dev/null
+++ b/docs/api_static/xrtpy.response.channel.rst
@@ -0,0 +1,8 @@
+:orphan:
+
+`xrtpy.response.channel`
+========================
+
+.. currentmodule:: xrtpy.response.channel
+
+.. automodapi:: xrtpy.response.channel
diff --git a/docs/api_static/xrtpy.response.rst b/docs/api_static/xrtpy.response.rst
new file mode 100644
index 000000000..80adc6faa
--- /dev/null
+++ b/docs/api_static/xrtpy.response.rst
@@ -0,0 +1,8 @@
+:orphan:
+
+`xrtpy.response`
+================
+
+.. currentmodule:: xrtpy.response
+
+.. automodapi:: xrtpy.response
diff --git a/docs/api_static/xrtpy.rst b/docs/api_static/xrtpy.rst
new file mode 100644
index 000000000..91fb98a50
--- /dev/null
+++ b/docs/api_static/xrtpy.rst
@@ -0,0 +1,8 @@
+:orphan:
+
+`xrtpy`
+=======
+
+.. currentmodule:: xrtpy
+
+.. automodapi:: xrtpy
diff --git a/docs/bibliography.bib b/docs/bibliography.bib
new file mode 100644
index 000000000..14a6ba443
--- /dev/null
+++ b/docs/bibliography.bib
@@ -0,0 +1,40 @@
+@ARTICLE{culhane:2007,
+  author = {{Culhane}, J.~L. and {Harra}, L.~K. and {James}, A.~M. and {Al-Janabi}, K. and {Bradley}, L.~J. and {Chaudry}, R.~A. and {Rees}, K. and {Tandy}, J.~A. and {Thomas}, P. and {Whillock}, M.~C.~R. and {Winter}, B. and {Doschek}, G.~A. and {Korendyke}, C.~M. and {Brown}, C.~M. and {Myers}, S. and {Mariska}, J. and {Seely}, J. and {Lang}, J. and {Kent}, B.~J. and {Shaughnessy}, B.~M. and {Young}, P.~R. and {Simnett}, G.~M. and {Castelli}, C.~M. and {Mahmoud}, S. and {Mapson-Menard}, H. and {Probyn}, B.~J. and {Thomas}, R.~J. and {Davila}, J. and {Dere}, K. and {Windt}, D. and {Shea}, J. and {Hagood}, R. and {Moye}, R. and {Hara}, H. and {Watanabe}, T. and {Matsuzaki}, K. and {Kosugi}, T. and {Hansteen}, V. and {Wikstol}, {\O}.},
+  title = "{The EUV Imaging Spectrometer for Hinode}",
+  journal = "{Solar Physics}",
+  year = 2007,
+  volume = {243},
+  number = {1},
+  pages = {19-61},
+  doi = {10.1007/s01007-007-0293-1}
+}
+@ARTICLE{golub:2007,
+  author = {{Golub}, L. and {Deluca}, E. and {Austin}, G. and {Bookbinder}, J. and {Caldwell}, D. and {Cheimets}, P. and {Cirtain}, J. and {Cosmo}, M. and {Reid}, P. and {Sette}, A. and {Weber}, M. and {Sakao}, T. and {Kano}, R. and {Shibasaki}, K. and {Hara}, H. and {Tsuneta}, S. and {Kumagai}, K. and {Tamura}, T. and {Shimojo}, M. and {McCracken}, J. and {Carpenter}, J. and {Haight}, H. and {Siler}, R. and {Wright}, E. and {Tucker}, J. and {Rutledge}, H. and {Barbera}, M. and {Peres}, G. and {Varisco}, S.},
+  title = "{The X-Ray Telescope (XRT) for the Hinode Mission}",
+  journal = "{Solar Physics}",
+  year = 2007,
+  volume = {243},
+  number = {1},
+  pages = {63-86},
+  doi = {10.1007/s11207-007-0182-1}
+}
+@ARTICLE{kosugi:2007,
+  author = {{Kosugi}, T. and {Matsuzaki}, K. and {Sakao}, T. and {Shimizu}, T. and {Sone}, Y. and {Tachikawa}, S. and {Hashimoto}, T. and {Minesugi}, K. and {Ohnishi}, A. and {Yamada}, T. and {Tsuneta}, S. and {Hara}, H. and {Ichimoto}, K. and {Suematsu}, Y. and {Shimojo}, M. and {Watanabe}, T. and {Shimada}, S. and {Davis}, J.~M. and {Hill}, L.~D. and {Owens}, J.~K. and {Title}, A.~M. and {Culhane}, J.~L. and {Harra}, L.~K. and {Doschek}, G.~A. and {Golub}, L.},
+  title = "{The Hinode (Solar-B) Mission: An Overview}",
+  journal = "{Solar Physics}",
+  year = 2007,
+  volume = {243},
+  number = {1},
+  pages = {3-17},
+  doi = {10.1007/s11207-007-9014-6}
+}
+@ARTICLE{tsuneta:2008,
+  author = {{Tsuneta}, S. and {Ichimoto}, K. and {Katsukawa}, Y. and {Nagata}, S. and {Otsubo}, M. and {Shimizu}, T. and {Suematsu}, Y. and {Nakagiri}, M. and {Noguchi}, M. and {Tarbell}, T. and {Title}, A. and {Shine}, R. and {Rosenberg}, W. and {Hoffmann}, C. and {Jurcevich}, B. and {Kushner}, G. and {Levay}, M. and {Lites}, B. and {Elmore}, D. and {Matsushita}, T. and {Kawaguchi}, N. and {Saito}, H. and {Mikami}, I. and {Hill}, L.~D. and {Owens}, J.~K.},
+  title = "{The Solar Optical Telescope for the Hinode Mission: An Overview}",
+  journal = "{Solar Physics}",
+  year = 2008,
+  volume = {249},
+  number = {2},
+  pages = {167-196},
+  doi = {10.1007/s11207-008-9174-z}
+}
diff --git a/docs/bibliography.rst b/docs/bibliography.rst
new file mode 100644
index 000000000..54b204ac0
--- /dev/null
+++ b/docs/bibliography.rst
@@ -0,0 +1,10 @@
+.. _bibliography:
+
+############
+Bibliography
+############
+
+.. The bibliography is built from references contained within
+   bibliography.bib. Add new references to bibliography.bib.
+
+.. bibliography::
diff --git a/docs/conf.py b/docs/conf.py
index 28894cc18..2bed0eabf 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -4,18 +4,16 @@
 # full list see the documentation:
 # http://www.sphinx-doc.org/en/master/config
 
+import os
+
 from datetime import datetime
+from sphinx.application import Sphinx
 
 # -- Project information -----------------------------------------------------
 
 project = "xrtpy"
 author = "Joy Velasquez and Nick Murphy"
-
-# TODO: Simplify the copyright year commands in 2022
-current_year = datetime.utcnow().year
-copyright_years = str(current_year) if current_year == 2021 else f"2021–{current_year}"
-
-copyright = f"{copyright_years}, {author}"
+copyright = f"2015–{datetime.utcnow().year}, {author}"
 
 # The full version, including alpha/beta/rc tags
 # from xrtpy import __version__
@@ -29,53 +27,178 @@
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
 # ones.
 extensions = [
+    "sphinx_automodapi.automodapi",
     "sphinx.ext.autodoc",
     "sphinx.ext.intersphinx",
-    "sphinx.ext.todo",
-    "sphinx.ext.coverage",
-    "sphinx.ext.inheritance_diagram",
-    "sphinx.ext.viewcode",
-    "sphinx.ext.napoleon",
-    "sphinx.ext.doctest",
+    "sphinx.ext.graphviz",
     "sphinx.ext.mathjax",
-    "sphinx_automodapi.automodapi",
-    "sphinx_automodapi.smart_resolver",
+    "sphinx.ext.napoleon",
+    "sphinx.ext.todo",
+    "nbsphinx",
+    "sphinx_copybutton",
+    "sphinx_gallery.load_style",
+    "IPython.sphinxext.ipython_console_highlighting",
+    "sphinx_changelog",
+    "sphinxcontrib.bibtex",
+    "hoverxref.extension",
 ]
 
+bibtex_bibfiles = ["bibliography.bib"]
+bibtex_default_style = "plain"
+bibtex_reference_style = "author_year"
+bibtex_cite_id = "{key}"
+
 # Add any paths that contain templates here, relative to this directory.
 # templates_path = ['_templates']
 
 # List of patterns, relative to source directory, that match files and
 # directories to ignore when looking for source files.
 # This pattern also affects html_static_path and html_extra_path.
-exclude_patterns = ["_build", "Thumbs.db", ".DS_Store"]
+exclude_patterns = [
+    ".DS_Store",
+    "_build",
+    "_links.rst",
+    "_substitutions.rst",
+    "Thumbs.db",
+]
 
 # The suffix(es) of source filenames.
 # You can specify multiple suffix as a list of string:
 source_suffix = ".rst"
 
-# The master toctree document.
-master_doc = "index"
+# The root toctree document.
+root_doc = "index"
 
 # -- Options for intersphinx extension ---------------------------------------
 
 intersphinx_mapping = {
-    "python": ("https://docs.python.org/3", None),
+    "astropy": ("https://docs.astropy.org/en/stable/", None),
+    "ndcube": ("https://docs.sunpy.org/projects/ndcube/en/stable/", None),
     "numpy": ("https://numpy.org/doc/stable/", None),
+    "python": ("https://docs.python.org/3", None),
     "scipy": ("https://docs.scipy.org/doc/scipy/reference/", None),
-    "pandas": ("https://pandas.pydata.org/pandas-docs/stable/", None),
-    "astropy": ("https://docs.astropy.org/en/stable/", None),
     "sunpy": ("https://docs.sunpy.org/en/stable/", None),
-    "ndcube": ("https://docs.sunpy.org/projects/ndcube/en/stable/", None),
 }
 
+hoverxref_intersphinx = [
+    "astropy",
+    "ndcube",
+    "numpy",
+    "python",
+    "scipy",
+    "sunpy",
+]
+
+autoclass_content = "both"
+autodoc_typehints_format = "short"
+
 # -- Options for HTML output -------------------------------------------------
 
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
-html_theme = "bizstyle"
+html_theme = "sphinx_rtd_theme"
 
 # Add any paths that contain custom static files (such as style sheets) here,
 # relative to this directory. They are copied after the builtin static files,
 # so a file named "default.css" will overwrite the builtin "default.css".
-# html_static_path = ['_static']
+html_static_path = ["_static"]
+
+linkcheck_allowed_redirects = {
+    r"https://doi\.org/.+": r"https://.+",  # DOI links are more persistent
+    r"https://docs.+\.org": r"https://docs.+\.org/en/.+",
+    r"https://docs.+\.io": r"https://docs.+\.io/en/.+",
+    r"https://docs.+\.com": r"https://docs.+\.com/en/.+",
+    r"https://docs.+\.dev": r"https://docs.+\.dev/en/.+",
+    r"https://.+\.readthedocs\.io": r"https://.+\.readthedocs\.io/en/.+",
+    r"https://.+/github\.io": r"https://.+/github\.io/en/.+",
+    r"https://pip\.pypa\.io": r"https://pip\.pypa\.io/en/.+",
+    r"https://www.python.org/dev/peps/pep.+": "https://peps.python.org/pep.+",
+}
+
+linkcheck_anchors = True
+linkcheck_anchors_ignore = [
+    "/room",
+    r".+openastronomy.+",
+    "L[0-9].+",
+    "!forum/plasmapy",
+]
+
+# Use a code highlighting style that meets the WCAG AA contrast standard
+pygments_style = "default"
+
+# adapted from sphinx-hoverxref conf.py
+if os.environ.get("READTHEDOCS"):
+    # Building on Read the Docs
+    hoverxref_api_host = "https://readthedocs.org"
+
+    if os.environ.get("PROXIED_API_ENDPOINT"):
+        # Use the proxied API endpoint
+        # - A RTD thing to avoid a CSRF block when docs are using a
+        #   custom domain
+        hoverxref_api_host = "/_"
+
+hoverxref_tooltip_maxwidth = 600  # RTD main window is 696px
+hoverxref_auto_ref = True
+hoverxref_mathjax = True
+hoverxref_sphinxtabs = True
+
+# hoverxref has to be applied to these
+hoverxref_domains = ["py", "cite"]
+hoverxref_roles = ["confval", "term"]
+
+hoverxref_role_types = {
+    # roles with cite domain
+    "p": "tooltip",
+    "t": "tooltip",
+    #
+    # roles with py domain
+    "attr": "tooltip",
+    "class": "tooltip",
+    "const": "tooltip",
+    "data": "tooltip",
+    "exc": "tooltip",
+    "func": "tooltip",
+    "meth": "tooltip",
+    "mod": "tooltip",
+    "obj": "tooltip",
+    #
+    # roles with std domain
+    "confval": "tooltip",
+    "hoverxref": "tooltip",
+    "ref": "tooltip",
+    "term": "tooltip",
+}
+
+# Specify patterns to ignore when doing a nitpicky documentation build.
+
+python_role = "py:.*"
+
+nitpick_ignore_regex = [
+    (python_role, "and"),
+    (python_role, "array .*"),
+    (python_role, "array_like"),
+    (python_role, "callable"),
+    (python_role, "function"),
+    (python_role, ".*integer.*"),
+    (python_role, "iterable"),
+    (python_role, "key"),
+    (python_role, "keyword-only"),
+    (python_role, ".* object"),
+    (python_role, "optional"),
+    (python_role, "or"),
+    (python_role, ".*real number.*"),
+    (python_role, ".*Unit.*"),
+]
+
+# This is added to the end of RST files — a good place to put substitutions to
+# be used globally.
+rst_epilog = ""
+for epilog_file in ["_links.rst", "_substitutions.rst"]:
+    with open(epilog_file) as file:
+        rst_epilog += file.read()
+
+
+def setup(app: Sphinx) -> None:
+    app.add_config_value("revision", "", True)
+    app.add_css_file("css/admonition_color_contrast.css")
+    app.add_css_file("css/plasmapy.css", priority=600)
diff --git a/docs/contributing/data_from_idl.rst b/docs/contributing/data_from_idl.rst
new file mode 100644
index 000000000..64d44d510
--- /dev/null
+++ b/docs/contributing/data_from_idl.rst
@@ -0,0 +1,7 @@
+.. _release guide:
+
+********************************
+Updating Data from SolarSoft IDL
+********************************
+
+This page has not yet been written.
diff --git a/docs/contributing/index.rst b/docs/contributing/index.rst
new file mode 100644
index 000000000..fe4cb6592
--- /dev/null
+++ b/docs/contributing/index.rst
@@ -0,0 +1,13 @@
+.. _contributor guide:
+
+*****************
+Contributor Guide
+*****************
+
+.. toctree::
+   :maxdepth: 3
+
+   install_dev
+   workflow
+   data_from_idl
+   release_guide
diff --git a/docs/contributing/install_dev.rst b/docs/contributing/install_dev.rst
new file mode 100644
index 000000000..c20a0b1f5
--- /dev/null
+++ b/docs/contributing/install_dev.rst
@@ -0,0 +1,7 @@
+.. _installation for development:
+
+****************************
+Installation for Development
+****************************
+
+This page has not yet been written.
diff --git a/docs/contributing/release_guide.rst b/docs/contributing/release_guide.rst
new file mode 100644
index 000000000..2f51004ae
--- /dev/null
+++ b/docs/contributing/release_guide.rst
@@ -0,0 +1,7 @@
+.. _release guide:
+
+*************
+Release Guide
+*************
+
+This page has not yet been written.
diff --git a/docs/contributing/workflow.rst b/docs/contributing/workflow.rst
new file mode 100644
index 000000000..14562f10e
--- /dev/null
+++ b/docs/contributing/workflow.rst
@@ -0,0 +1,7 @@
+.. _contribution workflow:
+
+*********************
+Contribution Workflow
+*********************
+
+This page has not yet been written.
diff --git a/docs/examples.rst b/docs/examples.rst
new file mode 100644
index 000000000..ef1e018d6
--- /dev/null
+++ b/docs/examples.rst
@@ -0,0 +1,16 @@
+Examples
+========
+
+Here we catalog all the example Jupyter notebooks that have been created for
+the various functionality contained in `xrtpy`.
+
+.. contents::
+   :local:
+
+Getting started
+---------------
+
+.. nbgallery::
+  :glob:
+
+  notebooks/getting_started/*
diff --git a/docs/getting_started.rst b/docs/getting_started.rst
new file mode 100644
index 000000000..67fecf76d
--- /dev/null
+++ b/docs/getting_started.rst
@@ -0,0 +1,8 @@
+Getting Started
+===============
+
+This page includes example notebooks intended for new users of `xrtpy`.
+
+.. nbgallery::
+
+  notebooks/getting_started/units
diff --git a/docs/glossary.rst b/docs/glossary.rst
new file mode 100644
index 000000000..69d81ce1b
--- /dev/null
+++ b/docs/glossary.rst
@@ -0,0 +1,10 @@
+.. currentmodule:: xrtpy
+
+.. _glossary:
+
+********
+Glossary
+********
+
+.. glossary::
+   :sorted:
diff --git a/docs/index.rst b/docs/index.rst
index 35fdfa0fe..9d6798984 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -1,14 +1,26 @@
-xrtpy Documentation
--------------------
+:tocdepth: 2
 
-This is the documentation for xrtpy: a Python package being developed
-for the analysis of observations made by the X-Ray Telescope (XRT) on
-the *Hinode* spacecraft.
+.. _xrtpy-documentation:
+
+###################
+XRTpy Documentation
+###################
+
+This is the documentation for `xrtpy`: a Python_ package being developed
+for the analysis of observations made by the `X-Ray Telescope`_ (XRT)
+:cite:p:`golub:2007` on the Hinode_ spacecraft :cite:p:`kosugi:2007`.
 
 .. toctree::
    :maxdepth: 2
    :caption: Contents:
 
+   install
+   getting_started
+   examples
+   bibliography
+   glossary
+   contributing/index
+
 Indices and tables
 ==================
 
diff --git a/docs/install.rst b/docs/install.rst
new file mode 100644
index 000000000..5d23de905
--- /dev/null
+++ b/docs/install.rst
@@ -0,0 +1,233 @@
+.. _xrtpy-install:
+
+****************
+Installing XRTpy
+****************
+
+.. important::
+
+   These instructions were written in preparation for the initial
+   release of `xrtpy` which has not yet happened. At present, `xrtpy` is
+   not able to be installed via ``pip`` from PyPI_, ``conda``, or
+   Anaconda Navigator. No official releases are available on Zenodo or
+   GitHub.
+
+.. .. note::
+   If you would like to contribute to XRTpy, please refer to the
+   instructions on :ref:`installing XRTpy for development
+   <install-xrtpy-dev>`.
+
+.. contents:: Contents
+   :local:
+
+Installing Python
+=================
+
+XRTpy requires Python_ |minpython| or newer. If you do not have Python_
+installed already, here are the instructions to `download Python`_ and
+install it.
+
+.. tip::
+
+   New versions of Python_ are released annually in October, and it can
+   take a few months for the scientific Python ecosystem to catch up. If
+   you have trouble installing `xrtpy` on the most recent Python_
+   version between October and ∼December, then try installing it on the
+   second most recent version.
+
+.. _install-pip:
+
+Installing XRTpy with pip
+============================
+
+To install the most recent release of `xrtpy` on PyPI_ with pip_ into
+an existing Python_ |minpython|\ + environment on macOS or Linux, open a
+terminal and run:
+
+.. code-block:: bash
+
+   python -m pip install xrtpy
+
+On some systems, it might be necessary to specify the Python_ version
+number by using ``python3``, ``python3.8``, ``python3.9``, or
+``python3.10`` instead of ``python``.
+
+To install XRTpy on Windows, run:
+
+.. code-block:: bash
+
+   py -3.10 -m pip install xrtpy
+
+The version of Python_ may be changed from ``3.10`` to another supported
+Python |minpython|\ + release that has been installed on your computer.
+
+For more detailed information, please refer to this tutorial on
+`installing packages`_.
+
+.. _install-conda:
+
+Installing Xrtpy with Conda
+==============================
+
+Conda_ is a package management system and environment manager that is
+commonly used in the scientific Python_ ecosystem. Conda_ lets us create
+and switch between Python_ environments that are isolated from each
+other and the system installation. Conda_ can also be used for packages
+written in languages other than Python_.
+
+After `installing Conda`_ or miniconda_, `xrtpy` can be installed
+into an activated Conda_ environment by opening a terminal and running:
+
+.. code-block:: bash
+
+   conda install -c conda-forge xrtpy
+
+Here ``-c conda-forge`` indicates that `xrtpy` should be installed
+from the conda-forge_ channel.
+
+To install `xrtpy` into another existing Conda_ environment, append
+:samp:`-n {env_name}` to the previous command, where :samp:`{env_name}`
+is replaced with the name of the environment.
+
+To create a new environment with `xrtpy` installed in it, run:
+
+.. code-block:: bash
+
+    conda create -n env_name -c conda-forge xrtpy
+
+where :samp:`{env_name}` is replaced by the name of the environment. To
+activate this environment, run:
+
+.. code-block:: bash
+
+   conda activate env_name
+
+To update `xrtpy` to the most recent version within a currently
+activated Conda_ environment, run:
+
+.. code-block:: bash
+
+   conda update xrtpy
+
+.. tip::
+
+   Creating a Conda_ environment can sometimes take a few minutes. If it
+   takes longer than that, try updating to the newest version of Conda_
+   with ``conda update conda`` or checking out these tips for
+   `improving Conda performance`_.
+
+Installing XRTpy with Anaconda Navigator
+===========================================
+
+.. note::
+
+   This section contains instructions on how to install XRTpy with
+   `Anaconda Navigator`_ at the time of writing. For the most up-to-date
+   information, please go to the official documentation on `installing
+   Anaconda Navigator`_ and `managing packages`_.
+
+`Anaconda Navigator`_ is a graphical user interface (GUI) for Conda_
+that can be used to install Python packages. It is installed
+automatically with newer versions of Conda_. If you are using Miniconda_
+or a different Conda_ environment, you can install it with
+``conda install anaconda-navigator``. After that it can be opened by
+entering ``anaconda-navigator`` in the terminal.
+
+First, go to the :guilabel:`Environments` tab and select
+:guilabel:`Channels`. If ``conda-forge`` is not listed, then go to
+:guilabel:`Add`, enter ``https://conda.anaconda.org/conda-forge``, and
+click on :guilabel:`Update channels` and then :guilabel:`Update index`.
+
+.. Is conda-forge now being added by default?
+.. Is clicking on `Update index` actually necessary?
+
+Next, while on the :guilabel:`Environments` tab, select the environment
+that you would like to install `xrtpy` in. The default is generally
+``base (root)``. Optionally, you may select :guilabel:`Create` to start
+a new environment. In the search bar, enter ``xrtpy``. Click on the
+checkbox next to ``xrtpy``, and select :guilabel:`Apply` to begin the
+installation process.
+
+To test the installation, click on the :guilabel:`▶` icon that should be
+present next to the activated environment, and select
+:guilabel:`Open terminal`. Enter ``python`` in the terminal, and then
+``import xrtpy`` to make sure it works.
+
+Installing XRTpy from source code
+====================================
+
+Obtaining official releases
+---------------------------
+
+A ZIP_ file containing the source code for official releases of
+`xrtpy` can be obtained `from PyPI`_ or `from Zenodo`_.
+
+Alternatively, official releases can be downloaded from the
+releases_ page on `XRTpy's GitHub repository`_.
+
+Obtaining source code from GitHub
+---------------------------------
+
+If you have git_ installed on your computer, you may clone `XRTpy's
+GitHub repository`_ and access the source code from the most recent
+development version by running:
+
+.. code:: bash
+
+   git clone https://github.com/xrtpy/xrtpy.git
+
+The repository will be cloned inside a new subdirectory called
+:file:`xrtpy`.
+
+If you do not have git_ installed on your computer, then you may download
+the most recent source code from `XRTpy's GitHub repository`_ by
+going to :guilabel:`Code` and selecting :guilabel:`Download ZIP`.
+`Unzipping <https://www.wikihow.com/Unzip-a-File>`__ the file will
+create a subdirectory called :file:`XRTpy` that contains the source
+code.
+
+Building and installing
+-----------------------
+
+To install the downloaded version of `xrtpy`, enter the :file:`xrtpy`
+directory and run:
+
+.. code:: bash
+
+   pip install .
+
+If you expect to occasionally edit the source code, instead run:
+
+.. code:: bash
+
+   pip install -e .[developer]
+
+The ``-e`` flag makes the installation editable and ``[developer]``
+indicates that all of the dependencies needed for developing XRTpy
+will be installed.
+
+.. note::
+
+   If you noticed any places where the installation instructions could
+   be improved or have become out of date, please create an issue on
+   `XRTpy's GitHub repository`_. It would really help!
+
+.. .. tip::
+   The :ref:`contributing-to-xrtpy` guide has instructions on how to
+   fork a repository and create branches so that you may make
+   contributions via pull requests.
+
+.. _Anaconda Navigator: https://www.anaconda.com/products/individual
+.. _clone a repository using SSH: https://docs.github.com/en/get-started/getting-started-with-git/about-remote-repositories#cloning-with-ssh-urls
+.. _conda-forge: https://conda-forge.org
+.. _download Python: https://www.python.org/downloads/
+.. _from PyPI: https://pypi.org/project/xrtpy
+.. _from Zenodo: https://doi.org/10.5281/zenodo.1436011
+.. _improving Conda performance: https://docs.conda.io/projects/conda/en/latest/user-guide/concepts/conda-performance.html#improving-conda-performance
+.. _installing Anaconda Navigator: https://docs.anaconda.com/anaconda/navigator/install/
+.. _installing Conda: https://docs.conda.io/projects/conda/en/latest/user-guide/install/index.html
+.. _installing packages: https://packaging.python.org/en/latest/tutorials/installing-packages/#installing-from-vcs
+.. _managing packages: https://docs.anaconda.com/anaconda/navigator/tutorials/manage-packages/#installing-a-package
+.. _miniconda: https://docs.conda.io/en/latest/miniconda.html
+.. _releases: https://github.com/xrtpy/xrtpy/releases
+.. _ZIP: https://en.wikipedia.org/wiki/ZIP_(file_format)
diff --git a/docs/notebooks/getting_started/units.ipynb b/docs/notebooks/getting_started/units.ipynb
new file mode 100644
index 000000000..0c43836cf
--- /dev/null
+++ b/docs/notebooks/getting_started/units.ipynb
@@ -0,0 +1,724 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "6e8f0d92",
+   "metadata": {},
+   "source": [
+    "# Using Astropy Units"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "e2751e56",
+   "metadata": {
+    "nbsphinx": "hidden"
+   },
+   "outputs": [],
+   "source": [
+    "%xmode minimal"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "c566fe1c",
+   "metadata": {},
+   "source": [
+    "In scientific computing, we often represent physical quantities as numbers."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "ee456b33",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "distance_in_miles = 50\n",
+    "time_in_hours = 2\n",
+    "velocity_in_mph = distance_in_miles / time_in_hours\n",
+    "print(velocity_in_mph)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "93658d4f",
+   "metadata": {},
+   "source": [
+    "[astropy.units]: https://docs.astropy.org/en/stable/units/index.html\n",
+    "[xrtpy]: https://xrtpy.readthedocs.io/en/latest\n",
+    "\n",
+    "Representing a physical quantity as a number has risks. We might unknowingly perform operations with different units, like `time_in_seconds + time_in_hours`. We might even accidentally perform operations with physically incompatible units, like `length + time`, without catching our mistake. We can avoid these problems by using a units package.\n",
+    "\n",
+    "This notebook introduces [astropy.units] with an emphasis on the functionality needed to work with [xrtpy]. We typically import this subpackage as `u`."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "8c20320a",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import astropy.units as u"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "ad28288e",
+   "metadata": {},
+   "source": [
+    "## Contents\n",
+    "\n",
+    "1. [Unit basics](#Unit-basics)\n",
+    "2. [Unit operations](#Unit-operations) \n",
+    "3. [Unit conversations](#Unit-conversions)\n",
+    "4. [Detaching units and values](#Detaching-units-and-values)\n",
+    "5. [Equivalencies](#Equivalencies)\n",
+    "6. [Physical constants](#Physical-constants)\n",
+    "7. [Optimizing unit operations](#Optimizing-unit-operations)\n",
+    "8. [Physical Types](#Physical-types)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "a9fad673",
+   "metadata": {},
+   "source": [
+    "## Unit basics\n",
+    "\n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "e9ccbb06",
+   "metadata": {},
+   "source": [
+    "We can create a physical quantity by multiplying or dividing a number or array with a unit."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "8437650a",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "distance = 60 * u.km\n",
+    "print(distance)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "ccc6659f",
+   "metadata": {},
+   "source": [
+    "[Quantity]: https://docs.astropy.org/en/stable/api/astropy.units.Quantity.html#astropy.units.Quantity\n",
+    "\n",
+    "This operation creates a [Quantity]: a number, sequence, or array that has been assigned a physical unit."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "a6354b93",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "type(distance)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "744a9b01",
+   "metadata": {},
+   "source": [
+    "[Quantity]: https://docs.astropy.org/en/stable/api/astropy.units.Quantity.html#astropy.units.Quantity\n",
+    "\n",
+    "We can also create an object by using the [Quantity] class itself."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "8d2bb681",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "time = u.Quantity(120, u.min)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "1bb28951",
+   "metadata": {},
+   "source": [
+    "[Quantity]: https://docs.astropy.org/en/stable/api/astropy.units.Quantity.html#astropy.units.Quantity\n",
+    "\n",
+    "We can create [Quantity] objects with compound units."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "4932159b",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "88 * u.imperial.mile / u.hour"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "9cc9adba",
+   "metadata": {},
+   "source": [
+    "[Quantity]: https://docs.astropy.org/en/stable/api/astropy.units.Quantity.html#astropy.units.Quantity\n",
+    "\n",
+    "We can even create [Quantity] objects that are explicitly dimensionless."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "09e9752c",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "3 * u.dimensionless_unscaled"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "4cffc8a0",
+   "metadata": {},
+   "source": [
+    "[Quantity]: https://docs.astropy.org/en/stable/api/astropy.units.Quantity.html#astropy.units.Quantity\n",
+    "\n",
+    "We can also create a [Quantity] based off of a NumPy array or a list."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "e3235d80",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import numpy as np\n",
+    "\n",
+    "np.array([2.5, 3.2, 1.1]) * u.kg"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "a686fd93",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "[2, 3, 4] * u.m / u.s"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "a60e9ea9",
+   "metadata": {},
+   "source": [
+    "## Unit operations\n",
+    "\n",
+    "[Quantity]: https://docs.astropy.org/en/stable/api/astropy.units.Quantity.html#astropy.units.Quantity\n",
+    "\n",
+    "Operations between [Quantity] objects handle unit conversions automatically. We can add [Quantity] objects together as long as their units have the same physical type."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "65e08284",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "1 * u.m + 25 * u.cm"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "edb43067",
+   "metadata": {},
+   "source": [
+    "Units get handled automatically during operations like multiplication, division, and exponentiation."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "c36788db",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "velocity = distance / time\n",
+    "print(velocity)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "04b48a57",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "area = distance**2\n",
+    "print(area)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "98331629",
+   "metadata": {},
+   "source": [
+    "Attempting an operation between physically incompatible units gives us an error, which we can use to find bugs in our code."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "0877feb6",
+   "metadata": {
+    "tags": [
+     "raises-exception"
+    ]
+   },
+   "outputs": [],
+   "source": [
+    "3 * u.m + 3 * u.s"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "4f0c461e",
+   "metadata": {},
+   "source": [
+    "[Quantity]: https://docs.astropy.org/en/stable/api/astropy.units.Quantity.html#astropy.units.Quantity\n",
+    "[numpy.ndarray]: https://numpy.org/doc/stable/reference/generated/numpy.ndarray.html\n",
+    "\n",
+    "[Quantity] objects behave very similarly to NumPy arrays because [Quantity] is a subclass of [numpy.ndarray]."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "59389429",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "balmer_series = [656.279, 486.135, 434.0472, 410.1734] * u.nm\n",
+    "Hα = balmer_series[0]\n",
+    "print(Hα)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "a6545132",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "np.max(balmer_series)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "e1bb9434",
+   "metadata": {},
+   "source": [
+    "[NumPy]: https://numpy.org/\n",
+    "[SciPy]: https://scipy.org/\n",
+    "\n",
+    "[Quantity]: https://docs.astropy.org/en/stable/api/astropy.units.Quantity.html#astropy.units.Quantity\n",
+    "[Quantity objects lose their units with some operations]: https://docs.astropy.org/en/stable/known_issues.html#quantities-lose-their-units-with-some-operations\n",
+    "\n",
+    "Most frequently encountered [NumPy] and [SciPy] functions can be used with [Quantity] objects.  However, [Quantity objects lose their units with some operations].  "
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "b910a84b",
+   "metadata": {},
+   "source": [
+    "## Unit conversions\n",
+    "\n",
+    "[Quantity]: https://docs.astropy.org/en/stable/api/astropy.units.Quantity.html#astropy.units.Quantity\n",
+    "[to]: https://docs.astropy.org/en/stable/api/astropy.units.Quantity.html#astropy.units.Quantity.to\n",
+    "\n",
+    "The [to] method allows us to convert a [Quantity] to different units of the same physical type. This method accepts strings that represent a unit (including compound units) or a unit object."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "80f4f133",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "velocity.to(\"m/s\")"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "21c46ef1",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "velocity.to(u.m / u.s)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "c1e742ca",
+   "metadata": {},
+   "source": [
+    "[Quantity]: https://docs.astropy.org/en/stable/api/astropy.units.Quantity.html#astropy.units.Quantity\n",
+    "[si]: https://docs.astropy.org/en/stable/api/astropy.units.Quantity.html#astropy.units.Quantity.si\n",
+    "[cgs]: https://docs.astropy.org/en/stable/api/astropy.units.Quantity.html#astropy.units.Quantity.cgs\n",
+    "\n",
+    "The [si] and [cgs] attributes convert the [Quantity] to SI or CGS units, respectively. "
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "02bda4d2",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "velocity.si"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "560a0cfe",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "velocity.cgs"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "1429d5a2",
+   "metadata": {},
+   "source": [
+    "## Detaching units and values\n",
+    "\n",
+    "[value]: https://docs.astropy.org/en/stable/api/astropy.units.Quantity.html#astropy.units.Quantity.value \n",
+    "[Quantity]: https://docs.astropy.org/en/stable/api/astropy.units.Quantity.html#astropy.units.Quantity\n",
+    "\n",
+    "The [value] attribute of a [Quantity] provides the number (as a NumPy scalar) or NumPy array without the unit."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "24e8403c",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "time.value"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "4c6c027b",
+   "metadata": {},
+   "source": [
+    "[unit]: https://docs.astropy.org/en/stable/api/astropy.units.Quantity.html#astropy.units.Quantity.unit\n",
+    "[Quantity]: https://docs.astropy.org/en/stable/api/astropy.units.Quantity.html#astropy.units.Quantity\n",
+    "\n",
+    "The [unit] attribute of a [Quantity] provides the unit without the value."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "2c41a2fa",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "time.unit"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "be0c5349",
+   "metadata": {},
+   "source": [
+    "## Equivalencies"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "07c3b9c1",
+   "metadata": {},
+   "source": [
+    "[electron-volt]: https://en.wikipedia.org/wiki/Electronvolt\n",
+    "[Boltzmann constant]: https://en.wikipedia.org/wiki/Boltzmann_constant\n",
+    "\n",
+    "Occasionally the [electron-volt] (eV) as a unit of temperature. This is a shortcut for describing the thermal energy per particle, or more accurately the temperature multiplied by the [Boltzmann constant], $k_B$. Because an electron-volt is a unit of energy rather than temperature, we cannot directly convert electron-volts to kelvin."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "6b6fafd6",
+   "metadata": {
+    "tags": [
+     "raises-exception"
+    ]
+   },
+   "outputs": [],
+   "source": [
+    "u.eV.to(\"K\")"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "9299c8a1",
+   "metadata": {},
+   "source": [
+    "[astropy.units]: https://docs.astropy.org/en/stable/units/index.html\n",
+    "[equivalencies]: https://docs.astropy.org/en/stable/units/equivalencies.html\n",
+    "[temperature_energy()]: https://docs.astropy.org/en/stable/units/equivalencies.html#temperature-energy-equivalency\n",
+    "\n",
+    "To handle non-standard unit conversions, [astropy.units] allows the use of [equivalencies]. The conversion from eV to K can be done by using the [temperature_energy()] equivalency."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "afac5b4a",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "(1 * u.eV).to(\"K\", equivalencies=u.temperature_energy())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "b4c492cc",
+   "metadata": {},
+   "source": [
+    "[dimensionless_angles()]: https://docs.astropy.org/en/stable/api/astropy.units.equivalencies.dimensionless_angles.html#dimensionless-angles\n",
+    "\n",
+    "[frequency]: https://en.wikipedia.org/wiki/Frequency\n",
+    "[angular frequency]: https://en.wikipedia.org/wiki/Angular_frequency\n",
+    "\n",
+    "Radians are treated dimensionlessly when the [dimensionless_angles()] equivalency is in effect. Note that this equivalency does not account for the multiplicative factor of $2π$ that is used when converting between [frequency] and [angular frequency]."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "9735710b",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "(3.2 * u.rad / u.s).to(\"1 / s\", equivalencies=u.dimensionless_angles())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "7ec6d857",
+   "metadata": {},
+   "source": [
+    "## Physical constants"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "b714de6a",
+   "metadata": {},
+   "source": [
+    "[astropy.constants]: https://docs.astropy.org/en/stable/constants/index.html\n",
+    "\n",
+    "We can use [astropy.constants] to access the most commonly needed physical constants."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "746a79a7",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from astropy.constants import c, e, eps0, hbar, k_B, mu0\n",
+    "\n",
+    "print(c)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "c3ee9feb",
+   "metadata": {},
+   "source": [
+    "[Constant]: https://docs.astropy.org/en/stable/api/astropy.constants.Constant.html#astropy.constants.Constant\n",
+    "[Quantity]: https://docs.astropy.org/en/stable/api/astropy.units.Quantity.html#astropy.units.Quantity\n",
+    "[u.temperature_energy()]: https://docs.astropy.org/en/stable/units/equivalencies.html#temperature-energy-equivalency\n",
+    "\n",
+    "A [Constant] behaves very similarly to a [Quantity]. For example, we can use the Boltzmann constant to mimic the behavior of [u.temperature_energy()]."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "d2d59d08",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "thermal_energy_per_particle = 0.6 * u.keV\n",
+    "temperature = thermal_energy_per_particle / k_B\n",
+    "print(temperature.to(\"MK\"))"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "7c145497",
+   "metadata": {},
+   "source": [
+    "Electromagnetic constants often need the unit system to be specified. Code within PlasmaPy uses SI units."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "015de7fc",
+   "metadata": {
+    "tags": [
+     "raises-exception"
+    ]
+   },
+   "outputs": [],
+   "source": [
+    "2 * e"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "1a90c979",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "2 * e.si"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "f4da2ab0",
+   "metadata": {},
+   "source": [
+    "## Optimizing unit operations\n",
+    "\n",
+    "[performance tips]: https://docs.astropy.org/en/stable/units/index.html#performance-tips\n",
+    "[astropy.units]: https://docs.astropy.org/en/stable/units/index.html\n",
+    "\n",
+    "Astropy's documentation includes [performance tips] for using [astropy.units] in computationally intensive situations. For example, putting compound units in parentheses reduces the need to make multiple copies of the data."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "e3bc2348",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "volume = 0.62 * (u.barn * u.Mpc)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "55b8dcd1",
+   "metadata": {},
+   "source": [
+    "## Physical types"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "0421ee56",
+   "metadata": {},
+   "source": [
+    "[physical type]: https://docs.astropy.org/en/stable/units/physical_types.html\n",
+    "[physical_type]: https://docs.astropy.org/en/stable/api/astropy.units.UnitBase.html#astropy.units.UnitBase.physical_type\n",
+    "[get_physical_type()]: https://docs.astropy.org/en/stable/api/astropy.units.get_physical_type.html#astropy.units.get_physical_type\n",
+    "\n",
+    "A [physical type] corresponds to physical quantities with dimensionally compatible units. Astropy has functionality that represents different physical types. These physical type objects can be accessed using either the [physical_type] attribute of a unit or [get_physical_type()]."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "da6c9c7d",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "(u.m**2 / u.s).physical_type"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "f0d49b03",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "u.get_physical_type(\"number density\")"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "8cd7e09a",
+   "metadata": {},
+   "source": [
+    "These physical type objects can be used for dimensional analysis."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "d03b8eb0",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "energy_density = (u.J * u.m**-3).physical_type\n",
+    "velocity = u.get_physical_type(\"velocity\")\n",
+    "print(energy_density * velocity)"
+   ]
+  }
+ ],
+ "metadata": {
+  "celltoolbar": "Tags",
+  "kernelspec": {
+   "display_name": "Python 3 (ipykernel)",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.10.4"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}
diff --git a/docs/requirements.txt b/docs/requirements.txt
deleted file mode 100644
index 562e92fca..000000000
--- a/docs/requirements.txt
+++ /dev/null
@@ -1,11 +0,0 @@
--r ../requirements.txt
-
-jinja2 < 3.1
-numpydoc
-pillow
-sphinx == 2.4.4
-sphinx-automodapi
-sphinx-gallery
-sphinx_rtd_theme
-pytest
-setuptools-scm
diff --git a/docs/response/index.html b/docs/response/index.html
new file mode 100644
index 000000000..3cbb92aa0
--- /dev/null
+++ b/docs/response/index.html
@@ -0,0 +1,30 @@
+.. _xrtpy-response:
+
+***************************
+Response (`xrtpy.response`)
+***************************
+
+.. py:module:: xrtpy.response
+.. currentmodule:: xrtpy.response
+
+Introduction
+============
+
+The `xrtpy.response` subpackage includes functionality for describing
+XRT_ channels & filters, finding the effective area, and calculating the
+temperature response function.
+
+Submodules
+==========
+
+.. toctree::
+   :maxdepth: 2
+
+   channel
+
+API
+===
+
+.. automodapi:: xrtpy.response
+   :noindex:
+   :no-main-docstring:
diff --git a/pyproject.toml b/pyproject.toml
index ba3843144..1009d034f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,6 +4,10 @@ requires = ["setuptools >= 50.0",
             "wheel >= 0.34.0"]  # ought to mirror 'requirements/build.txt'
 build-backend = "setuptools.build_meta"
 
+[tool.gilesbot]
+
+[tool.gilesbot.pull_requests]
+enabled = true
 
 [tool.isort]
 line_length = 88
@@ -16,7 +20,3 @@ use_parentheses = true
 include_trailing_comma = true
 force_alphabetical_sort_within_sections = true
 lines_between_types = 1
-
-[ tool.gilesbot ]
-  [ tool.gilesbot.pull_requests ]
-    enabled = true
diff --git a/requirements/docs.txt b/requirements/docs.txt
index 38315f499..3a4d8f6ec 100644
--- a/requirements/docs.txt
+++ b/requirements/docs.txt
@@ -5,17 +5,19 @@
 -r extras.txt
 -r install.txt
 docutils < 0.18
+ipykernel
+ipython
 jinja2 < 3.1
 nbsphinx >= 0.8
 numpydoc >= 1.2
 pillow
 pygments >= 2.11.0
-sphinx <= 2.4.4
-sphinx_automodapi
+sphinx >= 4.5.0
 sphinx-changelog
 sphinx-copybutton
 sphinx-gallery
 sphinx-hoverxref
+sphinx_automodapi
 sphinx_rtd_theme >= 1.0.0
 sphinxcontrib-bibtex
 towncrier >= 20.0
diff --git a/setup.cfg b/setup.cfg
index 96e80655d..04d75f42e 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -58,12 +58,14 @@ docs =
   # ought to mirror requirements/docs.txt
   %(extras)s
   docutils < 0.18
+  ipykernel
+  ipython
   jinja2 < 3.1
   nbsphinx >= 0.8
   numpydoc >= 1.2
   pillow
   pygments >= 2.11.0
-  sphinx <= 2.4.4
+  sphinx >= 4.5.0
   sphinx_automodapi
   sphinx-changelog
   sphinx-copybutton
diff --git a/setup.py b/setup.py
index f5a87d166..461b7b0ac 100755
--- a/setup.py
+++ b/setup.py
@@ -5,7 +5,6 @@
 
 from setuptools import setup
 
-
 VERSION_TEMPLATE = """
 # Note that we need to fall back to the hard-coded version if either
 # setuptools_scm can't be imported or setuptools_scm can't determine the
diff --git a/tox.ini b/tox.ini
index 50791feac..397e5cf32 100644
--- a/tox.ini
+++ b/tox.ini
@@ -40,14 +40,11 @@ skip_install = true
 commands = coverage erase
 
 [testenv:build_docs]
-deps =
-  jinja2 < 3.1
-  docutils < 0.18
 changedir = {toxinidir}
 extras = docs
 setenv =
     HOME = {envtmpdir}
-commands = sphinx-build docs docs{/}_build{/}html -W --keep-going -b html {posargs}
+commands = sphinx-build docs docs{/}_build{/}html -W -n --keep-going -b html {posargs}
 
 [testenv:build_docs_no_examples]
 deps =
@@ -57,17 +54,7 @@ changedir = {toxinidir}
 extras = docs
 setenv =
     HOME = {envtmpdir}
-commands = sphinx-build -D nbsphinx_execute='never' docs docs{/}_build{/}html -b html {posargs}
-
-[testenv:build_docs_nitpicky]
-deps =
-  jinja2 < 3.1
-  docutils < 0.18
-changedir = {toxinidir}
-extras = docs
-setenv =
-    HOME = {envtmpdir}
-commands = sphinx-build docs docs{/}_build{/}html -W -n --keep-going -b html {posargs}
+commands = sphinx-build -D nbsphinx_execute='never' docs docs{/}_build{/}html -W -n --keep-going -b html {posargs}
 
 # This env tests minimal versions of each dependency.
 [testenv:py38-all-minimal]
diff --git a/xrtpy/__init__.py b/xrtpy/__init__.py
index 3d3caac2c..51bb2b4ad 100644
--- a/xrtpy/__init__.py
+++ b/xrtpy/__init__.py
@@ -1,4 +1,7 @@
-# Licensed under a 3-clause BSD style license - see LICENSE.rst
+"""
+A Python data analysis package for the `X-Ray Telescope`_ (XRT) on
+Hinode_.
+"""
 
 import warnings
 
diff --git a/xrtpy/response/__init__.py b/xrtpy/response/__init__.py
index 46245627e..ebea88c8d 100644
--- a/xrtpy/response/__init__.py
+++ b/xrtpy/response/__init__.py
@@ -1,5 +1,7 @@
+"""Response analysis for Hinode/XRT"""
+
 from . import channel
-from .channel import Geometry, EntranceFilter, Mirror, Filter, CCD, Channel
+from .channel import Geometry, EntranceFilter, Mirror, Filter, CCD, Channel, resolve_filter_name
 
 __all__ = [
     "channel",
diff --git a/xrtpy/response/channel.py b/xrtpy/response/channel.py
index 55c7e39f6..d2e2e4031 100644
--- a/xrtpy/response/channel.py
+++ b/xrtpy/response/channel.py
@@ -1,5 +1,6 @@
+"""Classes for describing channels on Hinode/XRT."""
+
 __all__ = [
-    "channel",
     "Geometry",
     "EntranceFilter",
     "Mirror",
@@ -40,6 +41,7 @@
 
 
 def resolve_filter_name(name):
+    """Resolve the filter name."""
     name = name.replace("_", "-")
     parts: list = name.split("/")
     new_parts: list = [part.capitalize() for part in name.split("/")]