The Bulletin of The Korean Astronomical Society (천문학회보)

The Korean Astronomical Society (한국천문학회)
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Effective Strategy for Precise Orbital and Geodetic Parameter Estimation Using SLR Observations for ILRS AAC

  • Kim, Young-Rok (Astrodynamics and Control Lab., Department of Astronomy, Yonsei University) ;
  • Oh, Jay (Astrodynamics and Control Lab., Department of Astronomy, Yonsei University) ;
  • Park, Sang-Young (Astrodynamics and Control Lab., Department of Astronomy, Yonsei University) ;
  • Park, Chandeok (Astrodynamics and Control Lab., Department of Astronomy, Yonsei University) ;
  • Park, Eun-Seo (Korea Astronomy and Space Science Institute) ;
  • Lim, Hyung-Chul (Korea Astronomy and Space Science Institute)
  • Published : 2012.10.17
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Abstract

In this study, we propose an effective strategy for precise orbital and geodetic parameter estimation using SLR (Satellite Laser Ranging) observations for ILRS AAC (Associate Analysis Center). The NASA/GSFC GEODYN II software and SLR normal point observations of LAGEOS-1, LAGEOS-2, ETALON-1, and ETALON-2 are utilized for precise orbital and geodetic parameter estimation. Weekly-based precise orbit determination strategy is applied to process SLR observations, and Precise Orbit Ephemeris (POE), TRF (Terrestrial Reference Frame), and EOPs (Earth Orientation Parameters) are obtained as products of ILRS AAC. For improved estimation results, selection strategies of dynamic and measurement models are experimently figured out and configurations of various estimation parameters are also carefully chosen. The results of orbit accuracy assessment of POE and precision analysis of TRF/EOPs for each case are compared with those of existing results. Finally, we find an appropriate strategy for precise orbital and geodetic parameter estimation using SLR observations for ILRS AAC.

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