期刊
ADVANCES IN SPACE RESEARCH
卷 51, 期 11, 页码 2035-2042出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.asr.2012.12.018
关键词
Thin shell model; Altitude; Conversion errors; Experimental mapping function
类别
资金
- National Natural Science Foundation [41104096]
The most frequently used mapping function for converting slant total electron content (STEC) to vertical total electron content (VTEC) uses a simplified ionospheric single layer model in satellite based augmentation system (SBAS). Aiming at ionospheric single layer model altitude variation, we analyzed the statistical characteristic of mapping function in systemic approach particular for the region of China, and then experimental mapping function was proposed. The experimental mapping function is used in SBAS ionospheric correction and the precision of vertical correction is compared with standard mapping function. The results show that conversion factor errors depend on latitude, time and elevation, experimental mapping function is helpful to the vertical TEC estimation and may improve the precision of SBAS ionospheric refraction correction especially for the low latitude region of China. (c) 2012 COSPAR. Published by Elsevier Ltd. All rights reserved.
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