Calibration and Validation of HY-2 Scatterometer Using NWP and Buoy Data

doi:10.3969/j.issn.0372-2112.2015.11.015

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ACTA ELECTRONICA SINICA ›› 2015, Vol. 43 ›› Issue (11) : 2237-2242. DOI: 10.3969/j.issn.0372-2112.2015.11.015

Calibration and Validation of HY-2 Scatterometer Using NWP and Buoy Data

ZHU Jin-tai^1,2, DONG Xiao-long², YUN Ri-sheng²

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Abstract

The scatterometer onboard HY-2 satellite is calibrated using Numerical Ocean Calibration and its retrieval winds after calibration are validated from 130 global buoys and winds from the European Centre for Medium-Range Weather Foresting Numerical Weather Prediction model using triple-collocation during December 2012,resulting in 3112 collocated triplets.The KNMI QC flag is used to collocate the data without rain efforts.It is found that functional relationship employing the error-in-variables method is more accuracy than that using linear regression for the validation of retrieval wind from HY-2 scatterometer.Moreover,using the wind component domain is confirmed to be favourable.It is shown that the uncertainties after ocean calibration is less than 0.15dB,resulting in 0.2m/s systematic wind effects.For both zonal and meridional winds,the similar wind fields comparing with buoys and ECMWF indicate that the effective of the calibration and high quality of the retrieval winds.

Key words

HY-2 satellite / scatterometer / calibration and validation / wind field

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ZHU Jin-tai, DONG Xiao-long, YUN Ri-sheng. Calibration and Validation of HY-2 Scatterometer Using NWP and Buoy Data[J]. Acta Electronica Sinica, 2015, 43(11): 2237-2242. https://doi.org/10.3969/j.issn.0372-2112.2015.11.015

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