Acta Geodaetica et Cartographica Sinica ›› 2019, Vol. 48 ›› Issue (4): 512-519.doi: 10.11947/j.AGCS.2019.20180095

• Marine Survey • Previous Articles     Next Articles

Overall calibration method of multibeam echo sounder installation biases based on terrain feature matching

LI Tie1,2, ZHOU Fengnian3, ZHAO Jianhu1,2   

  1. 1. School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China;
    2. Institute of Marine Science and Technology, Wuhan University, Wuhan 430079, China;
    3. The Survey Bureau of the Hydrology and Water Resources of Changjiang Estuary, Changjiang Water Resources Commission, Shanghai 200136, China
  • Received:2018-03-12 Revised:2018-06-21 Online:2019-04-20 Published:2019-05-15
  • Supported by:
    The National Science and Technology Major Project of China (No. 2016YFB0501703); The National Natural Science Foundation of China (Nos. 4157060571; 41376109)

Abstract: The patch test method based on decoupling principle to determine MBES (multibeam echo sounders)installation biases often results in complex operation and low accuracy due to theoretical imperfections. Therefore, the overall calibration of the biases is proposed. Firstly, MBES sounding terrain is converted into grayscale image. Then, SIFT(scale-invariant feature transform) is used for matching related terrain images and founding matching point pairs. Finally, the inequality-constrained least square adjustment is used for obtaining the MBES installation biases by the matching point pairs coordinates. The experiment verifies the validation of this method in simplifying the implementation and improving the accuracy of determining these biases.

Key words: MBES installation biases, SIFT match, matching point pairs, overall calibration of biases

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