An Airborne SAR Radiometric Calibration Method with Random Constrained Evolution

Chen, Xi; Cao, Han; Sun, Lingma; Tong, Lieshu

doi:10.1109/icgmrs55602.2022.9849261

Cited by 1 publication

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“…Suppose scattering reciprocity is valid, that is, S hv =S vh , the unbalance between the polarized channels can be calibrated with the trihedral corner reflector, and the crosstalk between the polarized channels can be calibrated with the illuminated extended targets, for example, farm land or grass land. After polarimetric calibration, radiometric calibration is applied on each polarized images [8]. The crucial step is how to accurately measure the antenna radiation pattern in the range.…”

Section: Processing Chain and The Imaging Productsmentioning

confidence: 99%

An airborne P-band synthetic aperture radar system and its application in the southwest China

Yang,

Zhong

2024

Fourth International Conference on Geology, Mapping, and Remote Sensing (ICGMRS 2023)

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Mapping, monitoring and parameter inversion in the mountain areas covered with dense vegetation as well as cloud and mist is always a complicated subject. Synthetic aperture radar (SAR) is an effective sensor of great potential to solve this problem. In this paper, a high resolution P-band airborne SAR system is developed, which is the first quantitative airborne P-band SAR system for business operation in China. The inherent signal ambiguity phenomenon for wide beam radar system is discussed, and the solution is suggested and validated with this radar system. Then a flight campaign is launched with this P-band SAR system in the Southwest China. The defocusing introduced by the dramatic terrain undulations is analysed detailedly. By co-registering the external digital elevation model (DEM)to the SAR image and motion compensation, the refocused quality of the polarimetric SAR images satisfies the user's requirement. After polarimetric and radiometric calibration, the polarized composite and geocoded image products are obtained for further studies. With this P-band airborne SAR system, the repeat-pass interferometric data are expected to be collected in the future for the vegetated mountainous area, and it will play more important role in the fields of topographic mapping and deformation monitoring.

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Section: Processing Chain and The Imaging Productsmentioning

confidence: 99%