1. Interferometric Calibration Model for the LuTan-1 Mission: Enhancing Digital Elevation Model Accuracy.
- Author
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Mou, Jingwen, Wang, Yu, Hong, Jun, Wang, Yachao, Wang, Aichun, Sun, Shiyu, and Liu, Guikun
- Subjects
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DIGITAL elevation models , *SYNTHETIC aperture radar , *AMBIGUITY , *FORMATION flying , *SPATIAL resolution - Abstract
The LuTan-1 (LT-1) mission, China's first civilian bistatic spaceborne Synthetic Aperture Radar (SAR) mission, comprises two L-band SAR satellites. These satellites operate in bistatic InSAR strip map mode, maintaining a formation flight with an adjustable baseline to generate global digital elevation models (DEMs) with high accuracy and spatial resolution. This research introduces a dedicated interferometric calibration model for LT-1, tackling the unique challenges of the bistatic system, such as interferometric parameter coupling and the π -ambiguity problem caused by synchronization phase errors. This study validates the model using SAR images from LT-1 and Xinjiang corner reflector data, achieving interferometric phase accuracy better than 0.1 rad and baseline accuracy better than 2 mm, thereby producing high-precision DEMs with a height accuracy meeting the 5 m requirement. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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