Airborne SAR radiometric calibration using point targets

35th International Symposium on Remote Sensing of Environment

地球科学;生态环境科学

Zongmin, Feng^1,2 ; Lei, Huang^1 ; Zhihua, Tang^3 ; Jiuli, Liu^3 ; Liangbo, Zhao^3

Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing, China^1

Capital Normal University, Beijing, China^2

Beijing Institute of Spacecraft System Engineering, CAST, Beijing, China^3

关键词: Airborne SAR;    Backscattering coefficients;    Calibration constants;    Corner reflector;    Integral method;    Point targets;    Radiometric calibrations;    Sar calibrations;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/17/1/012186/pdf
DOI  :  10.1088/1755-1315/17/1/012186

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The trihedral corner reflector, with high stability, large RCS and little change within a wide angle range, is widely used in SAR radiometric calibration. Results from airborne SAR overflights of corner reflectors are utilized to compute calibration constant, transfer function of the system and backscattering coefficient of different targets. The key step of SAR calibration is the derivation of calibration constant. In this paper, we used two methods, the peak and integral method, to compute the calibration constant. Through real flight data, we found that, using point target for SAR calibration is simple and practicable.