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Acta Oceanologica Sinica

, Volume 36, Issue 5, pp 83–89 | Cite as

An advanced wind vector retrieval algorithm for the rotating fan-beam scatterometer

Article

Abstract

The rotating fan-beam scatterometer (RFSCAT) is a new type of satellite scatterometer that is proposed approximately 10 a ago. However, similar to other rotating scatterometers, relatively larger wind retrieval errors occur in the nadir and outer regions compared with the middle regions of the swath. For the RFSCAT with the given parameters, a wind direction retrieval accuracy decreases by approximately 9 in the outer regions compared with the middle region. To address this problem, an advanced wind vector retrieval algorithm for the RFSCAT is presented. The new algorithm features an adaptive extension of the range of wind direction for each wind vector cell position across the whole swath according to the distribution histogram of a retrieved wind direction bias. One hundred orbits of Level 2A data are simulated to validate and evaluate the new algorithm. Retrieval experiments demonstrate that the new advanced algorithm can effectively improve the wind direction retrieval accuracy in the nadir and outer regions of the RFSCAT swath. Approximately 1.6 and 9 improvements in the wind direction retrieval are achieved for the wind vector cells located at the nadir and the edge point of the swath, respectively.

Key words

rotating fan-beam scatterometer objective function wind vector retrieval distribution histogram of bias wind direction extension 

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Notes

Acknowledgements

The authors thank PO.DAAC for providing the SeaWinds L2B data.

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Copyright information

© The Chinese Society of Oceanography and Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  1. 1.School of Geographical SciencesGuangzhou UniversityGuangzhouChina
  2. 2.College of Natural Resources and EnvironmentSouth China Agricultural UniversityGuangzhouChina
  3. 3.Institute of Remote Sensing and Geographical Information SystemPeking UniversityBeijingChina

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