A geocoding method for SAR image based on TIN lookup table

A geocoding method for SAR image based on Triangulated Irregular Network (TIN) lookup table is proposed in this paper. Firstly, TIN DEM is generated from Grid DEM. Then, each node in TIN DEM is geocoded by Range-Doppler model to produce a TIN lookup table. Finally, geocoded image is resampled by TIN...

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Bibliographic Details
Published in2016 IEEE International Geoscience and Remote Sensing Symposium (IGARSS) pp. 5998 - 6001
Main Authors Jiwei Chen, Qiming Zeng, Jian Jiao, Jianghui Huang, Junsong Huang
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.07.2016
Subjects
Azimuth
geocoding
Indexes
lookup table
Mathematical model
Radar imaging
SAR
Surfaces
Synthetic aperture radar
Tin
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Summary:A geocoding method for SAR image based on Triangulated Irregular Network (TIN) lookup table is proposed in this paper. Firstly, TIN DEM is generated from Grid DEM. Then, each node in TIN DEM is geocoded by Range-Doppler model to produce a TIN lookup table. Finally, geocoded image is resampled by TIN lookup table. Experimental results show TIN lookup table can reduce file size with losing less precision, which compared with original Grid lookup table. Although TIN lookup table takes some time to create TIN DEM from Grid DEM, it takes less time than original lookup table in geocoding process. So it could save running time for large number of SAR images geocoding in the same area. TIN lookup table can balance between precision and file size, when its height tolerance approximately is less than accuracy of DEM products.
ISSN:2153-7003
DOI:10.1109/IGARSS.2016.7730567