Error of the Troposphere on GPS Measurements
XIE Shi-jie~1, PAN Bao-yu~2 (1. Surveying and Mapping Bureau of the Headquarters of the General Staff, Beijing 100088, China; 2. Shandong Institute of Surveying and Mapping of Geology, Jinan, Shandong 250011, China)
The authors introduce the nature of troposphere delay effect on GPS positioning, via research, the authors consider that troposphere delay error affects mainly height difference precision. The effective methods evaluating troposphere effect are as follows: getting average value of each period of time at each point, or each observation epoch estimating one using one by means of random model. Troposphere vertex delay is osculation interrelation with angle of altitude; Troposphere delay error could be accurately determined using WVR.
【CateGory Index】： P228.4