Create Star Tracker F Prime Component

[WT-MM]

See test/star-tracker for current star tracker implementation

In order:

• Write the Software Design Document (SDD file) to fully define interface with the rest of the satellite
• Scaffold out the necessary functionality in the StarTracker component
• Implement as best you can the full functionality (Rehaul Star Tracker Algorithm for flight safety and correctness #42 is a potential blocker for this)
• Add unit tests

[kevinthegreat1]

I think Daniel has a prototype component, hopefully I can talk to him tmr. Here's what I think:

• Input port (with return value): someone to call us to compute orientation (should we return quaternion or angles?)
• Calls the camera port to take a picture, and the camera returns us a buffer (and image width and height).
• Commands: Do we need any? e.g. PROCESS_IMAGE to trigger on-demand.
• Parameters: FOCAL_LENGTH_MM, PIXEL_SIZE_UM, TOLERANCE_DEG, NUM_FALSE_STARS, MAX_MISMATCH_PROB, CUTOFF — currently hardcoded in the test's main()
• Telemetry channels: attitude output (RA, Dec, Roll), number of centroids detected, number of stars (filtered centroids), number of identified stars
• Events: success/failure of identification, cutoff reached, not enough stars, database errors, basically all the current cerr in the prototype.