Atmospheric turbulence theory applied to GPS carrier-phase data

被引:33
作者
Schoen, Steffen [1 ]
Brunner, Fritz K. [2 ]
机构
[1] Leibniz Univ Hannover, IfE, D-30167 Hannover, Germany
[2] Graz Univ Technol, EGMS, A-8010 Graz, Austria
关键词
GPS; physical correlations; turbulence theory; atmospheric refractivity fluctuations;
D O I
10.1007/s00190-007-0156-y
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
Turbulent irregularities in the lower atmosphere cause physical correlations between Global Positioning System (GPS) carrier-phase measurements. Based on turbulence theory, a variance-covariance model is developed in this paper that reflects these correlations. The main result shows that the obtained fully-populated variance-covariance matrices depend not only on the satellite-station geometry, but also on the prevailing atmospheric conditions, which are parameterised by, e.g., the von Karman spectrum of refractivity fluctuations and the wind velocity vector. It is shown that the amount of the correlation between two GPS carrier-phase observations is inversely related to the separation distance of the corresponding ray paths through the turbulent atmosphere. Furthermore, the wind velocity and direction play a key role in the correlation.
引用
收藏
页码:47 / 57
页数:11
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