The Study of the Relationship Between the Result of GAMIT Processing and the Choice of IGS Station in the Northern China GPS Net
Liang Weifeng · Engineering of Surveying and Mapping · 2002
The observation data from Northern China GPS net has been processed using GAMIT soft-ware.In the processing,the choice of IGS station were divided into four cases:1.Choosing15IGS sta-tions;2.Choosing6IGS stations;3.Choosing3IGS stations;4.No IGS stations choosen.The results of the front four cases were compared form the repeat rate of baseline,baseline vector,site coordinates and the normalized root mean square(nrms).The conclusion is that it would be better choosing the reterence frame offered by IGS for the local net when processing GPS data with GAMIT software.The quantity might not be the most,but the choosen IGS stations should be well distributed in space as possible as they can.For the GPS net within1000Km,the best choice of IGS station is6also.The data of many times observation should use the same IGS stations to process as possible.