Moonlet satellite-and-ground time synchronization method for ground whole-satellite test

The invention discloses a moonlet satellite-and-ground time synchronization method for a ground whole-satellite test. The purpose of satellite-and-ground time synchronization in a simulated flight test is effectively achieved. The satellite service center computer time, the AOCC time and the ground dynamics simulation time are synchronized with the GPS dynamic simulator orbit simulation time by adjusting orbital parameters of a satellite control subsystem, having control over the orbit simulation starting moment of a GPS dynamic simulator and the satellite-and-rocket separation switch state of a moonlet, and using the satellite time correction function, satellite-and-ground time synchronization is achieved, the real in-orbit situation of the moonlet can be simulated, the basis is provided for satellite power distribution, time sequence analysis calculation and instruction arrangement, and reality and effectiveness of the ground whole-satellite test are ensured. Time users use GPS pulse-per-second signals output by a GPS receiver and corresponding integral second time correction data as the time keeping reference and the time correction reference, the difference between the satellite time and the ground time does not change along with the length of the testing time, and accuracy of a ground test system is improved.