Wind Speed Retrieval Algorithm Using Ku-Band Radar Onboard GPM Satellite

In this study, sea surface wind speed was retrieved using the Global Precipitation Measurement (GPM) dual-frequency precipitation radar (DPR) Ka-band data. In order to establish the Ka-band model at low incidence angles, the dependence of the DPR Ka-band normalized radar cross section (NRCS) on the wind speed, incidence angle, sea surface temperature (SST), significant wave height (SWH), and sea surface current speed (CSPD) was analyzed first. We confirmed that the normalized radar cross section depends on the wind speed, incidence angle, and SST. Second, an empirical model at low incidence angles was established. This model links the Ka-band NRCS to the incidence angle, wind speed, and SST. Additionally, the wind speed was retrieved by the model and was validated via the GPM Microwave Imager (GMI) wind product. The validation yielded a root mean square error (RMSE) of 1.45 m/s and the RMSE was better at a lower incidence angle and a higher SST. This model may expand the use of GPM DPR data in enriching the sea surface wind speed data set. It is also helpful for other Ka-band spaceborne radars at low incidence angles to measure wind speed in the future.

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Gale Wind Speed Retrieval Algorithm Using Ku-Band Radar Data Onboard GPM Satellite

Panfilova

Karaev

2022

Remote Sensing

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An algorithm to retrieve the wind speed within a wide swath from the normalized radar cross section (NRCS) is developed for the data of Ku-band radar operating in scanning mode installed onboard the Global Precipitation Measurement (GPM) satellite. NRCS at the nadir is calculated within a wide swath and is used to obtain the wind speed. The scatterometer data are used to obtain the dependence between NRCS at the nadir and the wind speed for gale winds. The algorithm was validated also using the Advanced Scatterometer (ASCAT) data and revealed good accuracy.

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Wind Speed Retrieval Algorithm Using Ku-Band Radar Onboard GPM Satellite

Cited by 4 publications

References 26 publications

Monitoring of the Arctic Region Using Optical and Infrared Data from the Highly Elliptical Arktika-M Space System and Microwave Measurements from Low Earth Orbit Satellites

Monitoring of the Arctic Region Using Optical and Infrared Data from the Highly Elliptical Arktika-M Space System and Microwave Measurements from Low Earth Orbit Satellites

Wind Speed Retrieval Using Global Precipitation Measurement Dual-Frequency Precipitation Radar Ka-Band Data at Low Incidence Angles

Gale Wind Speed Retrieval Algorithm Using Ku-Band Radar Data Onboard GPM Satellite

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