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遥感学报 1998
A Method for Retrieving Inhomogeneous Reflectivity Fields within the Radar Beam
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Abstract:
A retrieval scheme by using deconvolution method and dense data acquisition is proposed for extracting the information of inhomogenous reflectivities in a radar beam and therefore increasing the angular resolution of radar observation. Preliminary nomerical simulations show that the retrieval method can increase the angular resolution by a factor of 3 in comparison with conventional radar measurement. and has a distinct inversion ability for reflectivity variations especially with the periods of 0.58-2.0HW (here HW is the 3dB antenna beam width). The influence of measurement errors on the retrieved result is also investigated by numerical simulation. Some technical specification requirements in radar observations for this retrieval scheme are discussed. This retrieval method will he useful for the accuracy improvement of measurements of precipitation, cloud water content and other parameters by radar, in particular by spaceborne active or passive remote sensors.
