利用DORIS相位数据的Jason-2卫星精密定轨

Jason-2 Precise Orbit Determination Using DORIS RINEX Phase Data

主要研究了DORIS系统RINEX观测值模型的建立及其主要误差——星载接收机钟差的改正方法,在此基础上实现了基于DORIS系统RINEX相位观测值数据的Jason-2卫星精密轨道确定。研究表明,利用拟合接收机钟差和利用RINEX频偏数据这两种钟差改正方法,基于RINEX相位观测值的Jason-2卫星精密定轨均能达到径向1cm量级的精度;而拟合接收机钟差改正能同时削弱接收机钟的高阶振荡误差,可以获得更高的定轨精度。

The new DORIS observations in RINEX format are now available with dual fre- quency phase and pseudo-range measurements. Due to shorter distribution latency with re- spect to the older MVR data in doris2.2 format, this RINEX DORIS data can be widely used in LEO medium orbit determination. With analyzing the phase observation equation, this pa- per has proposed two different methods to correct the main receiver clock error, thus reali- zing the Jason-2 POD based on DORIS phase data. The research shows that 1 cm radial orbit precision can be achieved by using fitted receiver clock offset correction or frequency offset correction. And by weakening the high-order receiver clock error, applying the fitted clock offset correction can further improve the orbit precision.