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Journal Article
Performance Comparison of KOMPSAT-5 Precision Orbit Determination with GRACE
- Authors
- Kyoung-Min Roh, Yoola Hwang
- Issue Date
- 2020-02
- Citation
- International Journal of Aerospace Engineering, v.2020, pp.1-11
- ISSN
- 1687-5966
- Publisher
- Hindawi Publishing
- Language
- English
- Type
- Journal Article
- Abstract
- The Korean Multipurpose Satellite-5 (KOMPSAT-5) launched on 22 August 2013 was equipped with a global positioning system (GPS) receiver for precision orbit determination (POD). Even though the GPS receiver of KOMPSAT-5 shares the same heritage as the BlackJack receiver onboard in Gravity Recovery and Climate Experiment (GRACE) satellites, KOMPSAT-5 has a lower orbital position accuracy (10 cm) compared with GRACE (2 cm). The reduced dynamic and kinematic methods are applied for POD of KOMPSAT-5 and GRACE to investigate the GPS observation quality due to the satellite operation concept and hardware design. The results are analyzed in terms of the number of observations and their spatial distribution, GPS signal quality, and orbital position accuracies. The results show that the frequent attitude maneuvers of KOMPSAT-5 affect the quality of the GPS signals and solutions obtained from the kinematic method compared with that determined from the reduced-dynamic method. The onboard patch GPS antenna installed in KOMPSAT-5 and its geometrical position resulted in more erratic measurement residuals by 140% compared with the choke ring antenna of GRACE. The POD accuracy is dependent on the hardware design and regular attitude tilting for the synthetic aperture radar (SAR) imaging even though the same GPS receiver performances.
- KSP Keywords
- GPS antenna, GPS observation, GPS receiver, GPS signal, Global positioning system(GPS), Kinematic method, Korea Multi-Purpose SATellite-5(KOMPSAT-5), Observation quality, Performance comparison, Precision Orbit Determination(POD), Reduced-dynamic method
This work is distributed under the term of Creative Commons License (CCL)
(CC BY)
(CC BY)
