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http://dx.doi.org/10.5139/JKSAS.2003.31.10.051

A Study on Autonomous Update of Onboard Orbit Propagator  

Jeong,Ok-Cheol (전북대학교 항공우주공학과 대학원)
No,Tae-Su (전북대학교 기계항공시스템공학부)
Lee,Sang-Ryul (한국항공우주연구원 다목적체계연구그룹)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.31, no.10, 2003 , pp. 51-59 More about this Journal
Abstract
A method of autonomous update is presented for onboard orbit propagator. On board propagator is an alternative means that could be used for navigation purpose in case of CPS receiver's failure. Although the ground station is not a able to upload a new propagator, the onboard propagator must be maintained most up-to-date. For this, a filtering technique is proposed wherein GPS data are effectively used to continuously update the on board propagator which was uploaded previously. Even if the ground station has generated the on board propagator based on the wrong information, the onboard propagator with updating scheme can automatically correct the errors in the coefficients of residual reconstruction function. Several scenarios were used to show the validity of the scheme for updating the onboard propagator using KOMPSAT-1 orbit data.
Keywords
Onboard Orbit Propagator; Kalman Filter; Reference Orbit; Residual Reconstruction Function;
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