A review of GNSS precision timing method in restricted environments
GNSS precision timing technology is widely used in the national defense and military fields,but satellite navigation signals are inherently vulnerable to all kinds of intentional and unintentional interference.In order to improve the robustness and security of GNSS precision timing,it is urgent to develop timing technology under restricted environment.The problems existing in the application of GNSS timing are introduced,the research status of GNSS precision timing method is analyzed in this paper.The recommendations for development reponses are also presented,including using the Beidou-3 PPP-B2b information for real-time PPP timing under the condition of no ground communication network,using the inertial navigation to assisted PPP instantaneous re-convergence and the additional clock difference mode to accelerate PPP re-convergence under the signal occlusion condition,and using the multi-array anti-jamming antenna to improve GNSS timing performance under the complex electromagnetic environment.It provides a reference for expanding the application of GNSS timing technology in time frequency field.
GNSS precision timinganti-jamming algorithmprecise point positioningre-convergence modelclock offset model
万方数据
维普
