Multiple ground locations targets

[renato-franze]

Hello!

I am using Basilisk as part of my master thesis, I want to start by expressing my gratitude for this great tool!

I am looking to develop a simulation in which a satellite observes a series of targets within a certain region during an orbital pass. I am using the locationPointing module together with the groundLocation module to set a specific location on Earth as the target. I would like to set multiple locations (and therefore targets) in order to perform a series of pointing manoeuvres and point at one target after the other during the same pass. Could you advise the simplest way to do so?

Cheers,

Renato

[schaubh]

You would need to create your own BSK module to update the ground location target message that feeds locationPointing. If you are not familiar with making C/C++ modules, not that you can make BSK modules in Python as well. See documentation on the details.

[scout-andrew]

Within the sim loop, you need to follow @schaubh's guidance and write a separate module to handle target switching. If you're willing to exit the simulation loop, the bsk-gym-interface repo has some examples of ground pointing with multiple targets.

It works by creating a fake 'pointing objective' target, connecting locationPointing to that fake target, and swapping the position it represents with whichever target you want after the sim executes.

[renato-franze]

Howdy!

Thank you very much for your responses.
I have followed Professor Schaub's advice and added a class to handle the target switch. I am storing the geodetic coordinates of the targets in a matrix and using a flag to call elements of this matrix, switching every time a certain attitude error threshold is reached. It seems that the code runs once without any errors, but the simulation gets stuck at the first iteration and the code never finishes running. Could you suggest why?

AttitudeScheduling.txt

[joaogvcarneiro]

Hello Renato, can you check if what you see corresponds to issue #209?

[renato-franze]

That was the case, thank you very much for pointing it out!