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

Abstract

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.

Description

technical field [0001] The invention relates to a small-satellite satellite-ground time synchronization method used for ground whole-satellite testing, and belongs to the technical field of small-satellite testing. Background technique [0002] With the increasing precision and complexity of small satellite missions, more and more missions have to be completed by multiple subsystems on the satellite. The basis for the collaborative work of each subsystem is the unified high-precision time synchronization method on the satellite. In order to more fully and effectively verify the correctness of the scheme design of each subsystem during the ground test phase, a "mock flight test" is usually carried out, based on the principle of simulating the real situation of the satellite in orbit, for satellite power allocation, timing analysis calculation and command arrangement To provide a basis, the authenticity and validity of the model flight should be guaranteed. [0003] The contr...

AI Technical Summary

Problems solved by technology

In the test state of the control system subsystem, the simulated satellite-rocket separation signal can be used as a common excitation source, and the AOCC time, the ground dynamics simulation time and the time of the high-precision time system on the satellite can be started at the same time (at this time, the high-precision time system on the satellite uses the simulated device instead), but in the whole star state, the star-arrow separation signal cannot be used as a public excitation source

Images