GPS精密定位中对流层延迟误差的研究

对流层延迟是影响GPS精密定位精度的主要因素之一,本文采用不同的数据处理方案对国内4个IGS站一周的观测数据进行处理。实验结果表明,利用高度角加权、水平梯度参数并结合Niell投影函数方案能最大限度地利用低高度角的观测数据,从而提高坐标向量和基线向量高程方向上的精度。

Rse earch on the TroposphereDe lay in GPS Precise Position ing

Troposphere delay is one of the main accuracy -limiting factors for GPS positioning .We possessed one week data of four IGS stations with several methods .The results show that the method of elevation -dependent weighting of the observations , horizontal gradient parameters and Nell mapping function can make good use of low elevation angle observations .Therefore it can improve the ac-curacy of coordinate and baseline in altitude direction .