Rust

Fix track midpoint determination, in CGGTTS tracking #1712

Job	Run time
Documentation	4m 57s
Linter	11s
Build (Workspace default, ., -r)	6m 51s
Tests	8m 44s
Build (Workspace All-features, ., --all-features)	4m 14s
MacOS	7m 3s
Build (RINEX Default, rinex, -r)	58s
Windows	18m 23s
Build (RINEX Observations, rinex, --features "obs")	44s
Build (RINEX Navigation, rinex, --features "nav")	2m 42s
Build (RINEX QC, rinex, --features "qc")	45s
Build (RINEX Meteo, rinex, --features "meteo")	50s
Build (RINEX Clock, rinex, --features "clock")	44s
Build (ANTEX, rinex, --features "antex")	46s
Build (DORIS RINEX, rinex, --features "doris")	44s
Build (RINEX Processing, rinex, --features "processing")	1m 15s
Build (RINEX Full, rinex, --features "full")	2m 49s
Build (RINEX All-features, rinex, --all-features)	2m 51s
Build (SP3 default, sp3, -r)	38s
Build (SP3 QC, sp3, --features "qc")	34s
Build (SP3 Processing, sp3, --features "processing")	42s
Build (SP3 All-features, sp3, --all-features)	37s
Build (RINEX-QC Default, rinex-qc, -r)	3m 36s
Build (RINEX-QC SP3, rinex-qc, --features "sp3")	3m 6s
Build (RINEX-QC All-features, rinex-qc, --all-features)	3m 1s
	1h 17m 45s

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