卫星端宽巷载波相位小数偏差估计方法研究与结果分析
Estimation and Analysis for Widelane Carrier Phase Fractional Bias of Satellite
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摘要: 提出了一种估计星间单差宽巷载波相位FCB的新方法——区间均化法。利用2010年全球约120个IGS测站的数据,估计出所有星间单差宽巷载波相位的FCB,详细比较分析了星间单差宽巷FCB的估计精度。结果表明,使用区间均化法获得的卫星宽巷载波相位的FCB与法国CNES中心发布的FCB产品具有很好的一致性,较差均小于0.1周,94%小于0.05周。不同测站数量和测站分布估计相同卫星组星间单差宽巷载波相位的FCB结果具有较好的一致性,但测站数越多,FCB估值的可靠性越高。绝大部分星间单差宽巷载波相位的FCB在1a内具有较好的稳定性,其时间序列的标准差小于0.01周。卫星工作状态的变化会使FCB重新赋值。Abstract: A new algorithm named interval averaging method for estimating wide-lane single-difference-between-satellite FCBs is proposed.We use GPS data from 120 stations of IGS in 2010,all wide lane FCBs of each satellite are estimated and the estimation precision is analyzed in detail.The experiment results show that the estimated FCBs agree with CNES's very well.The difference between each other is less than 0.1 cycles,and 94% is less than 0.05 cycles.In FCBs estimation,station number and distribution of network have no significant affect on the FCBs value,but more stations you used lead to higher reliability and accuracy.Wide-lane FCBs are very stable in a year.On the other hand,satellite transmission restart will cause a new FCBs.
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