標題: Gravity recovery using COSMIC GPS data: application of orbital perturbation theory
作者: Hwang, C
土木工程學系
Department of Civil Engineering
關鍵字: COSMIC;GPS;orbit perturbation;temporal gravity variation;El Nino
公開日期: 1-五月-2001
摘要: COSMIC is a joint Taiwan-US mission to study the atmosphere using the Global Positioning System (GPS) occultation technique. Improved formulas are developed for the radial, along-track, and cross-track perturbations, which are more accurate than the commonly used order-zero formulas. The formulas are used to simulate gravity recovery using the geodetic GPS data of COSMIC in the operational phase. Results show that the EGM96 model can be improved up to degree 26 using 1 year of COSMIC data. TOPEX/POSEIDON altimeter data are used to derive a temporal gravity variation. COSMIC cannot reproduce this gravity variation perfectly because of data noise and orbital configuration, but the recovered field clearly shows the gravity signature due to mass movement in an El Nine.
URI: http://dx.doi.org/10.1007/s001900100159
http://hdl.handle.net/11536/29653
ISSN: 0949-7714
DOI: 10.1007/s001900100159
期刊: JOURNAL OF GEODESY
Volume: 75
Issue: 2-3
起始頁: 117
結束頁: 136
顯示於類別:期刊論文


文件中的檔案:

  1. 000169042200006.pdf