So flightgear is some alternate reality where the shuttle was equipped with a SSVP and docks to the Russian segment.
Tinkering with the rendezvous state vector filters on SPEC 33 - anyone has an idea what kind of accuracy to expect from the radar in ranging/angle or from the star tracker?
I've found a radar webpage (Shuttle unrelated) that gave me a ranging accuracy estimate of 20-50 m for various types of radar, which sounds pretty miserable for doing a rendezvous with docking in space, I know the figure of merit for an inertial nav is about a mile of drift per hour, but surely knowing one is in orbit and experiencing periodical motion must push the error down quite a bit,... so at this point I'm pretty much happy with any number for an order of magnitude for the various sensors.
Only for COAS I know how to do decent error estimates :lol:
Looks nice, just one thing though: The COAS glass has a purple tint to it, it's not clear like the HUD glass. This photo from STS-106 shows it nicely: https://www.dropbox.com/s/onr1cs84dfm44zn/STS106-375-022~orig.jpg?dl=0First tests with the brand-new mountable COAS frame - ISS visible through the recticie.
Still need to polish the alignment, hook it up properly to the electric system ad such, but it sure adds to the proximity ops experience.
Someone over in the FG forum managed to dig out a good number for the star tracker accuracy - it's in the Rendezvous workbook where it gives the 1 sigma error band to about an arcmin (which is vrey precise...)
Geez, hunting down these numbers surely is tedious...
Looks nice, just one thing though: The COAS glass has a purple tint to it, it's not clear like the HUD glass.
Thorsten, I found some specs for the Ku radar that may be of some help.