Analysis of the Impact of Extra Long-baseline in GPS Data Processing with High Precision
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摘要: 针对现有GPS数据处理过程中多余长基线对高精度GPS数据解算影响方面研究较少,文中选择具有不同已知点分布的两种CORS网观测数据,并按照解算时间分为4 h、6 h、8 h、12 h、18 h和24 h共6个时段,以定量分析在不同已知点分布和解算时间时多余长基线对高精度GPS数据解算的影响。最终得出,多余长基线的存在会对GPS数据解算的精度产生影响,且随着解算时间的增加,其影响呈减小趋势;多余长基线的存在也会对解算结果产生较大影响,在已知点分布较差时,影响最大值达到了12.7 mm,在已知点分布较好时最大值也达到了6 mm,且在各时段内,影响均较为明显。因此在进行高精度GPS数据解算时,需考虑多余长基线的影响。Abstract: According to the fact that there is no enough research of the extra long-baseline in GPS data processing with high precision. Focusing on the data of two CORS networks with different given points and dividing the processing time into the following six time periods: 4 hours, 6 hours, 8 hours,12 hours, 18 hours, this paper quantitatively analyzes the effects of different given points and extra long-baseline on GPS data processing with high precision. The result shows that extra long-baseline can make an effect on the accuracy of GPS data processing: the effect gets less as the increase of the processing time. And it also shows that the existence of the extra long-baseline has a relatively great effect on the result: when the given points locate worse, the maximum effect can reach 12.7mm, and when they locate better, the maximum effect gets to 6mm, and the effect is obvious in all of the 6 time periods. So the effect of extra long-baseline should be taken into consideration in GPS data processing with high precision.
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