Volume 33 Issue 9
Sep.  2008
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WANG Zhigang, BIAN Shaofeng. Passive Location of Underwater Target Based on Local Gravity Field Model[J]. Geomatics and Information Science of Wuhan University, 2008, 33(9): 918-921.
Citation: WANG Zhigang, BIAN Shaofeng. Passive Location of Underwater Target Based on Local Gravity Field Model[J]. Geomatics and Information Science of Wuhan University, 2008, 33(9): 918-921.
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Passive Location of Underwater Target Based on Local Gravity Field Model

  • 1Department of Navigation,Naval University of Engineering,717 Jiefang Road,Wuhan 430033,China;2Institute of Geodesy and Geophysics,Chinese Academy of Sciences,340 Xudong Street,Wuhan 430077,China

Funds: 国家杰出青年科学基金资助项目(40125013)
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  • Received Date: July 28, 2008
  • Revised Date: July 28, 2008
  • Published Date: September 04, 2008
    Graphical Abstract
    • Abstract
  • A new pattern for passive location which based on local gravity field model is presented.A fast Fourier series based local gravity field model is firstly introduced，then by which the measured gravity is expressed as continual analytical equation.Finally the classical extended Kalman filter is introduced to estimate the target position with measured gravity as measurement containing the information of target positon.Simulation is done on 0.2′×0.2′ gravity anomaly database，the result shows that the mean error of analytic equation of local gravity anomalies is less than 0.133 1 mGal，and the mean location errors in longitude and latitude are less than 0.777 0 nmile and 1.244 4 nmile respectively.
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