Image registration method for improving the positioning accuracy of HISEA-1 SAR image

doi:10.13474/j.cnki.11-2246.2023.0137

Abstract

Abstract: HISEA-1 is the first domestic C-band commercial SAR satellite bench marking with international advanced indicators. The highest imaging resolution is 1 m, and the whole satellite mass is less than 185 kg. It has the advantages of light, small, low cost and flexible scheduling. However, the positioning accuracy of the image products is still far behind that of domestic and foreign satellite images with high geometric accuracy, such as Sentinel-1 interferometric wide band mode image products. This paper presents a method to improve the geometric accuracy of SAR image by using image registration technology. Sentinel-1 data with known high-precision geographical coordinates is used as the reference datum, and HISEA-1 SAR data is used as the image to be registered. By completing the accurate matching between the two images, the positioning accuracy of HISEA-1 SAR image is corrected.

Key words: HISEA-1 SAR, position accuracy, Sentinel-1, phase congruency, image registration

CLC Number:

P237

ZHU Linhong, ZHONG Ruofei, WANG Ya, LI Qingyang. Image registration method for improving the positioning accuracy of HISEA-1 SAR image[J]. Bulletin of Surveying and Mapping, 2023, 0(5): 62-66.

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