Research on sea surface temperature retrieval by the  one-dimensional synthetic aperture microwave radiometer, 1D-SAMR

Weihua Ai; Mengyan Feng; Guanyu Chen; Wen Lu

doi:10.1007/s13131-020-1540-1

Volume 39 Issue 5

May 2020

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Weihua Ai, Mengyan Feng, Guanyu Chen, Wen Lu. Research on sea surface temperature retrieval by the one-dimensional synthetic aperture microwave radiometer, 1D-SAMR[J]. Acta Oceanologica Sinica, 2020, 39(5): 115-122. doi: 10.1007/s13131-020-1540-1

Citation:

Weihua Ai, Mengyan Feng, Guanyu Chen, Wen Lu. Research on sea surface temperature retrieval by the one-dimensional synthetic aperture microwave radiometer, 1D-SAMR[J]. Acta Oceanologica Sinica, 2020, 39(5): 115-122. doi: 10.1007/s13131-020-1540-1

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Research on sea surface temperature retrieval by the one-dimensional synthetic aperture microwave radiometer, 1D-SAMR

doi: 10.1007/s13131-020-1540-1

1.
College of Meteorology and Oceanography, National University of Defense Technology, Nanjing 211101, China
2.
PLA Troop 32033, Haikou 570100, China

Funds: The National Natural Science Foundation of China under contract Nos 41475019, 41575028, 41705007, 41605016, and 41505016.

More Information

Corresponding author: E-mail: a1044175130@163.com
Received Date: 2019-03-19
Accepted Date: 2019-05-17

Available Online: 2020-12-28

Publish Date: 2020-05-25

Abstract

Abstract

Due to the low spatial resolution of sea surface temperature (T_S) retrieval by real aperture microwave radiometers, in this study, an iterative retrieval method that minimizes the differences between brightness temperature (T_B) measured and modeled was used to retrieve sea surface temperature with a one-dimensional synthetic aperture microwave radiometer, temporarily named 1D-SAMR. Regarding the configuration of the radiometer, an angular resolution of 0.43° was reached by theoretical calculation. Experiments on sea surface temperature retrieval were carried out with ideal parameters; the results show that the main factors affecting the retrieval accuracy of sea surface temperature are the accuracy of radiometer calibration and the precision of auxiliary geophysical parameters. In the case of no auxiliary parameter errors, the greatest error in retrieved sea surface temperature is obtained at low T_S scene (i.e., 0.710 6 K for the incidence angle of 35° under the radiometer calibration accuracy of 0.5 K). While errors on auxiliary parameters are assumed to follow a Gaussian distribution, the greatest error on retrieved sea surface temperature was 1.330 5 K at an incidence angle of 65° in poorly known sea surface wind speed (W) (the error on W of 1.0 m/s) over high W scene, for the radiometer calibration accuracy of 0.5 K.
- sea surface temperature,
- synthetic aperture microwave radiometer,
- retrieval accuracy,
- radiometer calibration accuracy,
- auxiliary parameter errors,
- high spatial resolution

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References(24)

References

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