NDLI: Precise orbit determination for GRACE with zero-difference kinematic method

Content Provider	Springer Nature Link
Author	Li, JianCheng Zhang, ShouJian Zou, XianCai Jiang, WeiPing
Copyright Year	2009
Abstract	Thanks to the high performance of the spaceborne GPS receiver and the availability of precise IGS orbit and clock products, zero-difference kinematic precise orbit determination (POD) has been turned out to be a new effective method in orbit determination for the LEO satellites. Zero-difference kinematic POD, which is based on the GPS measurements only from the spaceborne GPS receiver, does not depend on the force models and orbit design. From this point of view, kinematic POD is suitable for the Earth observation satellites at very low altitudes, such as CHAMP, GRACE and GOCE, etc. This paper first reviews the basic zero-difference GPS observation model. Then a modified data quality control scheme is put forward. Finally, a block-wise least squares algorithm, which first separates the parameters into several groups and then solves the parameters by elimination and back-substitution, is discussed and proposed for the kinematic orbit determination. With the above algorithms, we developed kinematic POD software to solve the orbit suitable for one-week GRACE observations. Comparisons with the published Rapid Science Orbit (RSO) indicate that, using our approach to determine the orbit, the accuracy in the radial direction can achieve 3–4 cm for GRACE-A, and 3–5 cm for GRACE-B.
Starting Page	600
Ending Page	606
Page Count	7
File Format	PDF
ISSN	10016538
Journal	Chinese Science Bulletin
Volume Number	55
Issue Number	7
e-ISSN	18619541
Language	English
Publisher	SP Science in China Press
Publisher Date	2009-06-08
Publisher Place	Heidelberg
Access Restriction	Subscribed
Subject Keyword	GPS orbit determination POD GRACE kinematic zero-difference Engineering Earth Sciences Chemistry/Food Science Physics Life Sciences Science
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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