Volume 43 Issue 1
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Article Navigation >  Chinese Journal of Space Science  > 2023  >  43(1): 190-198 Open Access
ZHAO Xiaokang, LIN Wenming, WANG Zhixiong, HE Yijun. Effects of Sea Surface Temperature on the CFOSAT Scatterometer Measurements (in Chinese). Chinese Journal of Space Science, 2023, 43(1): 190-198 doi: 10.11728/cjss2023.01.220216017
Citation: ZHAO Xiaokang, LIN Wenming, WANG Zhixiong, HE Yijun. Effects of Sea Surface Temperature on the CFOSAT Scatterometer Measurements (in Chinese). Chinese Journal of Space Science, 2023, 43(1): 190-198 doi: 10.11728/cjss2023.01.220216017
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Effects of Sea Surface Temperature on the CFOSAT Scatterometer Measurements

doi: 10.11728/cjss2023.01.220216017 cstr: 32142.14.cjss2023.01.220216017
  • 1.

    School of Marine Science, Nanjing University of Information Science and Technology, Nanjing 210044

  • 2.

    Key Laboratory of Space Ocean Remote Sensing and Application, Ministry of Natural Resources, Beijing 100081

  • Received Date: 2022-02-15
  • Rev Recd Date: 2022-11-09
    • Available Online: 2023-02-11
    Abstract
  • Satellite scatterometer is designed to retrieve global sea surface winds by measuring the sea surface roughness. For Ku-band scatterometers, the sea surface roughness is not only affected by winds, but also by certain secondary effect, namely Sea Surface Temperature (SST). This paper presents a quantitative analysis of the SST effects on the China-France Oceanography Satellite (CFOSAT) scatterometer (CSCAT) backscatter measurements and wind retrievals. The results show that the backscatter coefficients measured by CSCAT vertically and horizontally polarized beams are both effected by SST, while for vertically polarized beams, the SST effect is nearly negligible at moderate and low incidence angles (θ < 36°). Consequently, the wind speed bias of CSCAT also changes along with SST, e.g., large SST-induced bias is associated with high incidence angles and/or low wind speed conditions. Finally, an SST-dependence Geophysical Model Function (GMF) is proposed, which opens a door for further improving the quality of CFOSAT scatterometer wind products.

     

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