Atmospheric Measurement Techniques
Atmospheric Measurement Techniques
AMT
Articles | Volume 16, issue 20
Articles | Volume 16, issue 20
https://doi.org/10.5194/amt-16-4769-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-16-4769-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 16, issue 20
Research article
 | 
20 Oct 2023
Research article |  | 20 Oct 2023

Higher-order calibration on WindRAD (Wind Radar) scatterometer winds

Zhen Li, Ad Stoffelen, Anton Verhoef, Zhixiong Wang, Jian Shang, and Honggang Yin

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Cited articles

Chi, C. Y. and Li, F. K.: A comparative study of several wind estimation algorithms for spaceborne scatterometers, IEEE T. Geosci. Remote, 26, 115–121, https://doi.org/10.1109/36.3011, 1988. a
CMA: FY-3E WindRAD, CMA [data set], http://satellite.nsmc.org.cn/portalsite/default.aspx?currentculture=en-US, last access: 12 October 2023. a
Cornford, D., Csató, L., Evans, D. J., and Opper, M.: Bayesian Analysis of the Scatterometer Wind Retrieval Inverse Problem: Some New Approaches, J. Roy. Stat. Soc. B, 66, 609–652, https://doi.org/10.1111/j.1467-9868.2004.02054.x, 2004. a
Li, Z., Stoffelen, A., Verhoef, A., and Verspeek, J.: Numerical Weather Prediction Ocean Calibration for the Chinese‐French Oceanography Satellite Wind Scatterometer and Wind Retrieval Evaluation, Earth and Space Science, 8, 1–17, https://doi.org/10.1029/2020ea001606, 2021. a, b, c
Li, Z., Verhoef, A., Stoffelen, A., Shang, J., and Dou, F.: First Results from the WindRAD Scatterometer on Board FY-3E: Data Analysis, Calibration and Wind Retrieval Evaluation, Remote Sens.-Basel, 15, 2087, https://doi.org/10.3390/15082087, 2023. a, b, c, d, e, f, g, h, i
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Short summary
WindRAD (Wind Radar) is the first dual-frequency rotating fan-beam scatterometer in orbit. We observe non-linearity in the backscatter distribution. Therefore, higher-order calibration (HOC) is proposed, which removes the non-linearities per incidence angle. The combination of HOC and NOCant is discussed. It can remove not only the non-linearity but also the anomalous harmonic azimuth dependencies caused by the antenna rotation; hence the optimal winds can be achieved with this combination.
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