GAMIT软件基线解算模式的对比研究

A Comparative Study of Baseline Solution Modes Based on GAMIT Software

在使用GAMIT软件进行基线解算时,可使用两种不同高精度的基线解算模式,即BASELINE模式以及RELAX.模式。为了研究这两种基线解算模式对不同基线长度解算结果的差异,并确定其适用范围,分别应用BASELINE模式和RELAX.模式对基线进行解算,并对两种模式的NRMS值、基线重复性、三维基线向量改正数以及点位精度等指标进行对比分析。实验表明,基线长度在1 000 km以内时,两种解算模式的解算效果相当;当基线长度大于1 000 km时,BASELINE模式的基线解算效果要优于RELAX.模式。

When using GAMIT software for baseline calculation,two different high-precision baseline calculation modes can be used,namely BASELINE mode and RELAX.mode.In order to study the differences of the results of the two baseline calculation modes for different baseline lengths,and to determine the scope of their application,the baseline was calculated by using the BASELINE mode and RELAX.mode respectively,and the NRMS value,base⁃line repeatability,three-dimensional baseline vector correction and point accuracy of the two modes were compared and analyzed.The experimental results show that when the baseline length is less than 1000 km,the results of the two methods are equivalent;when the baseline length is more than 1000 km,the baseline solution effect of BASE⁃LINE model is better than that of RELAX.