Variable Angular Rate Measurement for a Spacecraft Based on the Rolling Shutter Mode of a Star Tracker

Angular rate is a piece of useful information for the attitude control spacecraft. The star tracker as space optical sensor can be used to measure angular In this paper, novel approach proposed improve measurement accuracy during spacecraft rotation. electronic rolling shutter (RS) imaging mode complementary metal-oxide semiconductor (CMOS) image in applied obtain much higher sampling frequency reducing change between interval. optic flow vector on plane approximated within second order using three successive images reflect nonlinear effect from variable rate. experiment performed demonstrate advantage new measurement.