| Autor: |
WU Wenhao, ZHANG Lei, LI Tao, LONG Sichun, DUAN Meng, ZHOU Zhiwei, ZHU Chuanguang, JIANG Tingchen |
| Jazyk: |
čínština |
| Rok vydání: |
2019 |
| Předmět: |
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| Zdroj: |
Acta Geodaetica et Cartographica Sinica, Vol 48, Iss 11, Pp 1439-1451 (2019) |
| ISSN: |
1001-1595 |
| Popis: |
With the development of radar imaging technology and the diversification of imaging modes, the accuracy of coregistration in the direction of azimuth required by SAR interferometry is different. At present, due to the strict theoretical model and the high accuracy, the coregistration scheme with the image information based on geometric coregistration under the condition of precise orbits become the first choice for interference processing. In this paper, TerraSAR-X images have been taken as an example to demonstrate the accuracy of interferometric coregistration and satellite orbit required by different imaging modes. Furthermore, theoretical analysis and experimental validation have also been applied. It is proved that under the condition of precise orbits, SAR interferometric processing of strip-mode image of TerraSAR-X and other satellites can be achieved by geometric registration. While, spotlight imaging mode requires image coherence or spectral diversity to further optimization of the geometric coregistration results. Since the ESD (Enhanced Spectral Diversity) offset estimation method offers the highest accuracy. It has been used to estimate the geometric coregistration errors of Sentinel-1 satellite images with different orbit and DEM conditions. The results suggest that geometric coregistration error is mainly caused by the tangential error of the satellite orbit, and the difference of geometric corregistration of three kinds of DEM is much less than 0.001 pixels, which can meet the needs of Sentinel-1 image interference registration. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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