Volume 34 Issue 2
Feb.  2009
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QIN Xianping, YANG Yuanxi. GPS-Based Orbit Determination for LEO Using Bidirectional Filter[J]. Geomatics and Information Science of Wuhan University, 2009, 34(2): 231-235.
Citation: QIN Xianping, YANG Yuanxi. GPS-Based Orbit Determination for LEO Using Bidirectional Filter[J]. Geomatics and Information Science of Wuhan University, 2009, 34(2): 231-235.
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GPS-Based Orbit Determination for LEO Using Bidirectional Filter

  • 1Institute of Surveying and Mapping,Information Engineering University,66 Middle Longhai Road,Zhengzhou 450052,China;2Xi'an Research Institute of Surveying and Mapping,1 Middle Section,Yanta Road,Xi'an 710054,China

Funds: 国家自然科学基金资助项目(40474001,40604003)
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  • Received Date: December 04, 2008
  • Revised Date: December 04, 2008
  • Published Date: February 04, 2009
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  • We analyzed the difference between bidirectional filter and other methods of precise orbit determination(POD) for LEO using GPS.The theory of GPS-based orbit determination for LEO using bidirectional filter was deduced from satellite motion equation and LEO GPS zero-differential(ZD) phase observation equation.Two GRACE satellites orbits were computed using the software developed by our institute.We compared results with the orbits provided by JPL and independently validated with k-band ranging(KBR) data.We found that POD using bidirectional filter improves not only the accuracy of individual filter result at the beginning of the data arc evidently,but also the accuracy of orbits in the whole data arc.We also found that the method of GPS-based orbit determination for LEO using bidirectional filter is feasible and the orbits of GRACE computed by the software are at a level of better than 5 cm in radial,transverse and normal direction,respectively.
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