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- Title
Analysis of Higher-order Ionospheric Effects on Reference Frame Realization and Coordinate Variations.
- Authors
DENG Liansheng; JIANG Weiping; LI Zhao; PENG Lifeng
- Abstract
Based on the higher-order ionospheric corrections model, the impact magnitude of higher-order ionospheric delay on GPS observables was determined. Then, GPS data from 104 globally distributed IGS stations spanning the years 1999 to 2003 were reprocessed to study the effects of higher-order ionospheric corrections on GPS reference frame realization and site coordinates using GAMIT with state of the art models according to the 2010 IERS conventions. We compared the differences generated when applying different geomagnetic models to higher-order delays. Results show that both the reference frame origin and scale are influenced by the higher-order corrections, especially for the Z translation, which can add up to 20 mm, while the X and Y translation had a relatively smaller difference, less than 5 mm. Higher-order ionospheric effects can result in regional bias phenomenon at stations. Differences in the geomagnetic model lead to a change of up to 10 mm for the Z translation. Notable coordinate differences are found in some areas, these results are analyzed and discussed.
- Publication
Geomatics & Information Science of Wuhan University, 2015, Vol 40, Issue 2, p193
- ISSN
1671-8860
- Publication type
Article
- DOI
10.13203/j.whugis20130460