Satellite-Ground time synchronization technology of small satellite control system based on GNSS time scale
With the continuous improvement of the load resolution of our optical remote sensing satellite,the corresponding requirements for the attitude control accuracy and stability of the satellite platform are also gradually improved.For the satellite control platform with high accuracy and stability,the ground semi-physical test verification of control system indicators is also facing challenges.Improving the reliability of ground semi physical test verification needs to be mainly considered.One of the important aspects affecting the reliability of test verification is the satellite ground time synchronization.For this reason,this paper uses GNSS second pulse time latch technology and the method of satellite ground serial port downloading time i-dentification to design a high-precision satellite ground time synchronization system for small satellite control system based on GNSS time scale,thus improving the synchronization of satellite ground time.The test re-sults show that the satellite ground synchronization accuracy can be better than 65 μs.
small satellitecontrol systemGNSShigh-precisionSatellite-Ground time synchronization
万方数据
维普
