1、中文中文 5030 字字 出处：出处： GPS solutions, 2009, 13(3): 173-182 外文原文 Kalman-filter-based GPS clock estimation for near real-time positioning Andre Hauschild . Oliver Montenbruck Abstract： In this article, an algorithm for clock offset estimation of the GPS satellites is presented. The algorithm is based on
2、a Kalman-filter and processes undifferenced code and carrier-phase measurements of a global tracking network. The clock offset and drift of the satellite clocks are estimated along with tracking station clock offsets, troposphericzenith path delay and carrier-phase ambiguities. The article provides
3、a brief overview of already existing nearreal-time and real-time clock products. The filter algorithm and data processing scheme is presented. Finally, theaccuracy of the orbit and clock product is assessed with aprecise orbit determination of the MetOp satellite andcompared to results gained with o
4、ther real-time products. Keyword :Clock estimation Precise orbit determination Real-time Kalman filter Introduction A growing number of near real-time precise point positioning (PPP) applications raise the need for precise GPS orbit and clock products with short latency. One of these applications is the precise orbit determination (POD) of remote-sensing satellites, which is to be performed shortly after a ground station pass. The observations of the satellites GPS receiver are available imme
