Acta Geodaetica et Cartographica Sinica >

2016 , Vol. 45 >Issue 12: 1434 - 1440

DOI: https://doi.org/10.11947/j.AGCS.2016.20160182

Spaceborne SAR Image Geometric Rectification Method without Ground Control Points Using Orbit Parameters Modulation

  • CHEN Jiwei ,
  • ZENG Qiming ,
  • JIAO Jian ,
  • YE Fawang ,
  • ZHU Lijiang
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  • 1. Institute of Remote Sensing and Geographic Information System, Peking University, Beijing 100871, China;
    2. National Key Laboratory of Remote Sensing Information and Image Analysis Technology, Beijing Research Institute of Uranium Geology, Beijing 100029, China

Received date: 2016-04-25

  Revised date: 2016-11-01

  Online published: 2017-01-02

Supported by

The National Natural Science Foundation of China (No.41571337);China National Nuclear Corporation Projects (No.YAO HXY111-1)

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Abstract

When using the Range-Doppler model for SAR image geometric correction, the error of satellite orbit, imaging parameter and DEM elevation will affect the geometric correction accuracy. A new geometric rectification method has been presented for spaceborne SAR image. First, polynomial was used for parameterizing SAR orbit. Then orbit parameters were corrected by control points that acquired by matching of simulated SAR image and real SAR image. Finally, the precise geometric rectification using corrected parameters was accomplished. The presented method can be applied for SAR image geometric rectification where the ground control points are difficult to be acquired. It has higher precision compared to the geometric rectification based on image simulation and polynomial correction. The Radarsat-2 image was used in experiments, and the ground control points measured by GPS validated the proposed approach.

Key words： SAR image; geometric rectification; orbit parameter; Range-Doppler model

Cite this article

CHEN Jiwei , ZENG Qiming , JIAO Jian , YE Fawang , ZHU Lijiang . Spaceborne SAR Image Geometric Rectification Method without Ground Control Points Using Orbit Parameters Modulation[J]. Acta Geodaetica et Cartographica Sinica, 2016 , 45(12) : 1434 -1440 . DOI: 10.11947/j.AGCS.2016.20160182

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