Research Article

Real-Time Hardware-in-the-Loop Tests of Star Tracker Algorithms

Table 7

DS1 test cases characteristics.

DS1 test case 1DS1 test case 2DS1 test case 3

OrbitEquatorialPolar
Sensor boresight orientation (w.r.t. orbit)Radial (zenith)Perpendicular to orbit planeRadial (zenith)
Inertial attitude angles (deg) (3-1-3 Euler sequence)
 Rot.1Linear variation (360-deg range)900
 Rot.2
Linear variation (360-deg range)00
 Rot.3Stepwise constant 90; −90; +90; Linear variation (360-deg range)Stepwise constant 0; −180; 0;
Frame rate of simulated star fields (Hz)10
Number of stars in simulated star fields (mean/std over 1 orbit)138/74.0152/60.4143/86.1
Simulated stars size (LCD display pixels) 1 star imaged as a single pixel, >1 star imaged as a pixel strip(mean/std over 1 orbit)1.5/0.51.1/0.31.3/0.6