Star Tracker

[RobertPendergrast]

The satellite ADCS system uses a startracker to figure out where it is pointing. This works by having a camera periodically take images of stars and using some interesting algorithm to compare what it sees to a known map of prominent stars. The output of a startracker is its attitude in terms of attitude quaternions. We need to create a star tracker component that does this work.

• Make a new passive component called "startracker" that will interface with a camera driver (detector, should be a component and another branch) to receive images.
• The component should have commands, events, telemetry, and parameters configured.
• The steps are as follows:
  - Receive an image in a buffer
  - Find the bright spots on the image
  - Filter out spots that are wrong (think they are planets, other bodies in space, ect)
  - Find the center of the n brightest points from the image (need sub-pixel accuracy)
  - Find vectors pointing from camera in direction of those stars (this is the vector representing the possible position of that star in space)
  - Use an algorithm to determine the attitude of the satellite based on those stars, look at UW Lost algo for inspiration.

For implementation you can take a look at this open source code from UW. The main goal here is to port it over to fprime and run it successfully. https://github.com/UWCubeSat/lost/tree/master/src

Don't hesitate to reachout in slack if you have any questions! Always happy to walk through code and brainstorm ideas.