摘要
中性大气包括对流层和平流层,它们对GPS信号造成的延迟影响是GPS定位的一个主要误差源。与电离层的影响相比,消除中性大气的延迟影响更复杂,只能用经验模型进行改正。本文就中性大气对GPS定位的影响进行详细地分析和说明,对中性大气改正模型及其相关问题进行明确地论述。最后以中国IGS跟踪站一年中不同季节的观测数据为基础,通过对相同的数据采用不同的中性大气改正模型分别进行相同的定位解算,并对不同模型的定位结果进行分析,得出有关中性大气模型改正与GPS定位之间及改正模型间的定性和定量的关系。
The refraction of the neutral atmosphere, including the troposphere and stratosphere, is one of the major error sources for GPS positioning. It is more difficult to eliminate the delay caused by the refraction of the neutral atmosphere comparing to the ionospheric delay, which can be eliminated with observations from different frequencies. Therefore the corrections for the refraction of the neutral atmosphere are typically estimated with empirical models. This paper explains in details the effects of the neutral atmosphere and the related models, and draws a few quantitative and qualitative conclusions regarding to the effects of the neutral atmosphere on GPS positioning based on the analysis of the data sampled from different seasons at the IGS stations in China with different models.
出处
《测绘学报》
EI
CSCD
北大核心
2007年第2期134-140,共7页
Acta Geodaetica et Cartographica Sinica
基金
The Technology Agency of Finland IESR(211/31/04)
国家863计划项目(2006AA12Z306)
