대한원격탐사학회:학술대회논문집 (Proceedings of the KSRS Conference)
- 대한원격탐사학회 2007년도 Proceedings of ISRS 2007
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- Pages.382-385
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- 2007
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- 1226-9743(pISSN)
A STUDY OF TROPOSPHERIC EFFECT ON HIGH PRECISION GPS HEIGHT DETERMINATION
- Wang, Chuan-Sheng (Institute of Space Sciences, NCU) ;
- Liou, Yuei-An (Center for Space and Remote Sensing Research, NCU)
- 발행 : 2007.10.31
초록
Constantly enhancing positioning accuracy by the Global Positioning System (GPS) technique is of great importance, but challenging, especially after the GPS positioning technique has been improved considerably during the past two decades. The associated main error sources have been reduced substantially, if not eliminated. Troposhpeic influence with its highly temporal and spatial variability appears to be one of the major error sources. It is hence an increased interest among GPS researchers to reduce the tropospheric influence or delay. Two techniques have been commonly implemented to correct the tropospheric impact. The first technique, known as parameter estimation, characterizes the path delay with empirical models and the parameters of interest are determined from the GPS measurements. The second strategy, termed as external correction, involves independent path delay measurements. The present study is an integration of both techniques in which the parameter estimation as well as external correction are used to correct the path delay for