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Satellite on-orbit orbit predication method based on GPS measurement data

A technology for orbit prediction and measurement data, which is applied in the directions of measurement devices, radio wave measurement systems, satellite radio beacon positioning systems, etc., to achieve the effect of simplifying the amount of calculation and achieving good convergence.

Active Publication Date: 2015-04-08
AEROSPACE DONGFANGHONG DEV LTD
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Problems solved by technology

[0004] In order to solve the defects existing in the prior art, the present invention provides a method for forecasting satellite orbits based on GPS measurement data. The method is aimed at the currently commonly used low-orbit near-circular satellite orbits, based on an analytical orbit dynamics model, using On-orbit estimation of relevant ephemeris model parameters using Kalman filtering technique using GPS measurement information

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  • Satellite on-orbit orbit predication method based on GPS measurement data
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  • Satellite on-orbit orbit predication method based on GPS measurement data

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0023] The invention adopts the quasi-average radical method and Kalman filter technology based on no singular point variable, utilizes GPS measurement information to estimate relevant ephemeris model parameters on-orbit, and realizes on-orbit orbit prediction of satellites. In order to reduce the impact of calculation errors and rounding errors on the positive definiteness of the filter state error covariance matrix during the filtering process and avoid filter divergence during the long-term calculation process, the Kalman filtering technology in the form of Bierman-UD decomposition can be used.

[0024] According to different definitions, the average number of roots can be divided into average number of roots and quasi-average number of roots. The average number of roots only includes long-term change items, and the pseudo-average number of r...

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Abstract

The invention discloses a satellite on-orbit orbit predication method based on GPS measurement data. A satellite parsing ephemeris parameter model is mainly given with regard to a low-orbit near-circular satellite orbit, on-orbit predication is carried out on the ephemeris model parameters by virtue of GPS measurement information, and satellite ephemeredes with random time interval can be predicated. A simulation result indicates that the predication accuracy can achieve less than 20km with regard to near-circular orbits with distances of more than 450km; the satellite on-orbit orbit predication method based on GPS measurement data has great practicability.

Description

technical field [0001] The invention relates to the technical field of satellite orbit prediction in celestial mechanics, in particular to a satellite on-orbit orbit prediction method based on GPS measurement data. Background technique [0002] With the continuous development of satellite technology at home and abroad, especially the development of satellite networking, the demand for on-orbit autonomy of satellites continues to increase, and real-time orbit determination has become the primary condition for judging whether a satellite has autonomous capabilities. With the application of low-cost global navigation system receivers (including GPS in the United States and Beidou navigation system in China), it has become a development trend to perform real-time orbit determination on small satellites and improve the autonomy of small satellites. [0003] At present, the real-time on-orbit orbit determination of satellites based on GPS measurement information mainly uses Kalman...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/02G01C21/20
CPCG01S19/50
Inventor 刘燎丁强强孙华苗魏巍陶钊榕
Owner AEROSPACE DONGFANGHONG DEV LTD
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