Simulation of precise orbit determination of COSMIC from onboard GPS zero-difference phase data with kinematic method

Jinyun Guo; Cheinway Hwang; Zipang Tseng; Xiaotao Chang

doi:10.1117/12.773977

10 November 2007 Simulation of precise orbit determination of COSMIC from onboard GPS zero-difference phase data with kinematic method

Jinyun Guo, Cheinway Hwang, Zipang Tseng, Xiaotao Chang

Author Affiliations +

Proceedings Volume 6795, Second International Conference on Space Information Technology; 67951W (2007) https://doi.org/10.1117/12.773977
Event: Second International Conference on Spatial Information Technology, 2007, Wuhan, China

Abstract

COSMIC is a constellation mission to study the climate, ionosphere and geodesy. The main geodetic mission of COSMIC is to determine the global gravity field model and its temporal variations, which need the precise geometric orbit of COSMIC. GPS observations onboard COSMIC are simulated using the GPS precise final orbit and high-rate clock of CODE, the designed orbit of COSMIC and the GPS antennae for precise orbit determination (POD). The precise geometric orbits of COSMIC are determined with the kinematic method from the space-borne simulated observations to test the POD capability of GPS antennae. There are two POD GPS antennae onboard COSMIC, named as POD +X and -X. The orbit from POD -X antenna has the approximately same precision as that from POD +X antenna, and the errors of both are greater than the given random error while simulating GPS data. The main reason is that the designed positions of POD antennae are not good. There are the different angels between the boresight vector and zenith direction of two antennae. Another reason is that POD +X antenna is in the flying direction and POD -X antenna is in the inverse direction. In order to get the high precision of POD, a virtual antenna is constructed from POD +X and -X, whose center is the center of mass of COSMIC. Observations from POD +X and -X then are reduced to the virtual antenna. Comparing with the referenced orbit and the kinematic orbit from the virtual antenna, the precision of orbit is consistent to the given random error when simulating GPS data, up to centimeter level.

Citation Download Citation

Jinyun Guo, Cheinway Hwang, Zipang Tseng, and Xiaotao Chang "Simulation of precise orbit determination of COSMIC from onboard GPS zero-difference phase data with kinematic method", Proc. SPIE 6795, Second International Conference on Space Information Technology, 67951W (10 November 2007); https://doi.org/10.1117/12.773977

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available