A Radiometric Calibration and Error Analysis Method for HWRS SAR at S-band

Yabo LIU; Lin LIU; Zhiyong TONG; Zhongjun YU

doi:10.11999/JEIT180983

Volume 41 Issue 8

Aug. 2019

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Article Navigation > Journal of Electronics & Information Technology > 2019 > 41(8): 1946-1951

Yabo LIU, Lin LIU, Zhiyong TONG, Zhongjun YU. A Radiometric Calibration and Error Analysis Method for HWRS SAR at S-band[J]. Journal of Electronics & Information Technology, 2019, 41(8): 1946-1951. doi: 10.11999/JEIT180983

Citation:

Yabo LIU, Lin LIU, Zhiyong TONG, Zhongjun YU. A Radiometric Calibration and Error Analysis Method for HWRS SAR at S-band[J]. Journal of Electronics & Information Technology, 2019, 41(8): 1946-1951. doi: 10.11999/JEIT180983

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A Radiometric Calibration and Error Analysis Method for HWRS SAR at S-band

doi: 10.11999/JEIT180983

Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China

Funds: The National Natural Science Foundation of China (61201405), The Youth Innovation Promotion Association of Chinese Academy of Sciences (2017170)

Received Date: 2018-10-19
Rev Recd Date: 2019-03-14

Available Online: 2019-04-16

Publish Date: 2019-08-01

Abstract

Abstract

The radiometric calibration of Synthetic Aperture Radar (SAR) can establish a mapping relationship between SAR image and Radar Cross Section (RCS) of ground objects, which benefits the inversion of target physical properties, and further meets the needs of quantitative remote sensing. Compared with other wavebands, the reports about SAR works in S-band are rare. This paper focuses on the radiometric calibration of radar at S-band by using the known parameters of radar and plane. Firstly, the relationship between image pixel intensity and RCS of target is derived. Then, a detailed analysis on each error component is implemented, in which, the affection of antenna direction on radiometric calibration precision is given by the analytic expression. The analysis and simulation is propitious to error allocation during the design period. In addition, the mean RCS statistics of grass, road and calm water are given. The real data processing results show that a sufficient accuracy in 20° view angle can be achieved by using the radiometric calibration method.
- Synthetic Aperture Radar (SAR),
- S-band,
- Radiometric calibration,
- Error analysis,
- Radar Cross Section (RCS)

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References(15)

References

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