Wind retrieval capability of rotating range-gated fanbeam spaceborne scatterometer

Chung-Chi Lin; Ad Stoffelen; Joost de Kloe; Volkmar R. Wismann; Sven Bartha; Hans-Reiner Schulte

doi:10.1117/12.462995

8 April 2003 Wind retrieval capability of rotating range-gated fanbeam spaceborne scatterometer

Chung-Chi Lin, Ad Stoffelen, Joost de Kloe, Volkmar R. Wismann, Sven Bartha, Hans-Reiner Schulte

Proceedings Volume 4881, Sensors, Systems, and Next-Generation Satellites VI; (2003) https://doi.org/10.1117/12.462995
Event: International Symposium on Remote Sensing, 2002, Crete, Greece

Abstract

The primary mission of a wind scatterometer is to determine wind speed and direction over the ocean. This is achieved by performing a set of radar cross-section measurements at different azimuth view-angles over the resolution cell, and inverting the backscatter model, a so-called geophysical model function (GMF), to extract the wind information using the azimuth anisotropy of the radar backscatter by sea-surface in presence of wind. A new concept of rotating fanbeam radar was introduced which operates in C-band. The present paper describes an analysis of the new concept by means of wind retrieval simulations and an investigation of advanced features such as multi-beam, dual-polarisation, dual-frequency and polarimetric capabilities in improving the wind retrieval accuracy. End-to-end simulations of the complete system are performed starting from wind-fields which are sampled by the scatterometer model. The simulated radar echos are then converted to sets of backscattering coefficients (sigma-naught) which are inverted to obtain again the wind-fields containing measurement errors and noise. The performance of the system is assessed by analysing the quality of retrieved wind as functions of the instrument configuration and characteristics (parameters).

Citation Download Citation

Chung-Chi Lin, Ad Stoffelen, Joost de Kloe, Volkmar R. Wismann, Sven Bartha, and Hans-Reiner Schulte "Wind retrieval capability of rotating range-gated fanbeam spaceborne scatterometer", Proc. SPIE 4881, Sensors, Systems, and Next-Generation Satellites VI, (8 April 2003); https://doi.org/10.1117/12.462995

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