高精度星间时差测量探讨

摘要

在三星模式测量目标空间位置时，引入星地时差测量要素，可提高测量精度。阐述了通过地面设备测量星间时差的基本原理与实现方法，提出了地面设备信道间上下行时延不一致的标定方法，并对影响测量精度的主要因素进行了分析。%In order to improve the measuring accuracy, the factor of satellite and ground time difference is introduced when measuring a target＇s space coordinates in three-satellite mode. The basic principles and realizing methods of measuring the satellites time difference by using ground equipments are elaborated, the demarcating methods of measuring the time difference between the uplink and downlink channels of the ground equipments are put forward. The main factors which influence the measuring accuracy are analyzed.