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中文摘要：
GPS基线解算是高精度GPS相对定位数据处理过程中的一个重要环节。针对GPS长基线中如何有效消除电离层折射影响,GAMIT软件提供了两种长基线解算模型LC_AUTCLN和LC_HELP。本文通过对两种模型的理论分析与实验验证,结果表明在电离层稳定阶段进行10h的GPS连续观测,两种模型的基线解基本收敛且精度相当,若在电离层活跃的赤道附近建议采用LC_AUTCLN基线解。
英文摘要：
GPS baseline solution is an important step for GPS data processing.In order to eliminate the impact of ionosphere delay in GPS long baseline solution,GAMIT software offers two models,LC_AUTCLN and LC_HELP.In this paper,theoretical analysis and real data processing of the two solution models are introduced,the results show that two models are convergent with similar accuracy for the data processing of long baselines when the ionosphere is in stable period.LC_AUTCLN model is selected when GPS sites lies close to the equator where the ionosphere is more active.
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