3D wind field retrieval from spaceborne Doppler radar

Y. Lemaître; N. Viltard

doi:10.1117/12.976835

13 November 2012 3D wind field retrieval from spaceborne Doppler radar

Y. Lemaître, N. Viltard

Proceedings Volume 8523, Remote Sensing of the Atmosphere, Clouds, and Precipitation IV; 85230Q (2012) https://doi.org/10.1117/12.976835
Event: SPIE Asia-Pacific Remote Sensing, 2012, Kyoto, Japan

Abstract

Numerous space missions carrying a radar are presently envisioned, particularly to study tropical rain systems. Among those missions, BOITATA is a joint effort between Brazil (INPE/AEB) and France (CNES). The goal is to embark a Doppler radar with scanning possibilities onboard a low-orbiting satellite. This instrument should be implemented in addition to a Passive Microwave Radiometer (PMR) between 19 and 183 GHz, an improved ScaraB-like broadband radiometer, a mm/submm PMR and a lightning detection instrument. This package would be meant to document the feedback of the ice microphysics on the rain systems life cycle and on their heat and radiative budgets. Since the microphysics and the water and energy budgets are strongly driven by the dynamics, the addition of a Doppler radar with scanning possibilities could provide precious information (3D wind and rain fields). It would allow us to build a large statistics of such critical information over the entire tropics and for all the stages of development of the convection. This information could be used to better understand the tropical convection and to improve convection parameterization relevant for cloud and climate models and associated applications such as now-casting and risk prevention. The present work focuses on the feasibility to retrieve 3D winds in precipitating areas from such a radar. A simulator of some parts of the spaceborne radar is developed to estimate the precision on the retrieved wind field depending on the scanning strategies and instrumental parameters and to determine the best sampling parameters.

Citation Download Citation

Y. Lemaître and N. Viltard "3D wind field retrieval from spaceborne Doppler radar", Proc. SPIE 8523, Remote Sensing of the Atmosphere, Clouds, and Precipitation IV, 85230Q (13 November 2012); https://doi.org/10.1117/12.976835

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KEYWORDS

Radar

Doppler effect

Antennas

Meteorology

Convection

Wind energy

Radiometry

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