Salute!
Thank you, Megan.
I only know two Blackbird pilots, so I cannot confirm their astrotracking doofer.
The "newer" systems I worked with a bit over twenty years ago watered my eyes. The strapdown inertial for AMRAAM aligned in seconds and could get you within a hundred yards in one minute of manuevering flight.
I really like the idea of using something beside the GPS stuff.
Gums sends...