2.By means of the Lagrange Multiplier, this paper points out the position of celestial bodies when their azimuth varies the slowest during diurnalmotion, thus consummating the conclusion concerned.
3.Through experiment of diurnalmotion determination of the Sun, the guide ability of SGT is verified with a measuring accuracy 1.5″ (3σ) and the updating rate of attitude data is faster than 30Hz. The prototype of SGT meets the demand of AOCS of SST.
