IN-FLIGHT ALIGNMENT OF A SPACE TELESCOPE AND A STAR TRACKER CLUSTER AT A SCANNING OBSERVATION OF THE EARTH MARKED OBJECTS

摘要

For high-accuracy pointing an orbital telescope (OT) line-of-sight onto observed objects and fulfilling programs of scanning the Earth surface, it is required that the relative position of reference frames connected with spacecraft (SC) - an orbital telescope and the star trackers (STs) is precisely determined. The elaborated method for solving this problem is based on onboard processing of the information obtained both by the OT at a scanning observation of the Earth marked objects and by the STs. Moreover we apply the multiply digital filtering of measurements, polynomial approximation and the vector spline extrapolation of the quaternion values for the OT and ST attitude in the inertial reference frame.