天线相位中心改正模型对基线解算的影响

Effects of Receiver Antenna Phase Center Correction Model on GPS Baseline Solutions

利用天线相位中心改正模型并结合GAMIT软件对GPS观测数据进行了处理,分析对比了采用天线相位中心变化的相对改正模型和绝对改正模型对GPS基线解算产生的不同影响,结果显示,使用绝对相位中心改正模型得到的基线解算更为精确,解算结果还表明,若不对天线相位中心变化进行改正,会对解算结果造成数厘米的差异,所以在高精度工程数据处理时应当采用天线相位中心改正。

GAMIT is used to process the GPS data and to com- pare the different effects on GPS Baseline solutions using the relative correction model and absolute correction model of an- tenna phase center variations. A conclusion is drawed that ab- solute phase center correction model gets better results. It also reveals that ignoring the revise of these phase center variations can lead to serious （up to 10cm）errors. Using antenna phase center variation models in processing in high accuracy measur- ing or long baseline measuring is a effective way to avoid these errors.