Title :
Analysis of cross-beam resolution effects in rainfall rate profile retrieval from a spaceborne radar
Author :
Amayenc, P. ; Marzoug, Mongi ; Testud, Jacques
Author_Institution :
CNET-CNRS, Centre de Recherches en Phys. de l´´Environnement, Issy les Moulineaux, France
fDate :
3/1/1993 12:00:00 AM
Abstract :
The performance (stability and accuracy) of a range profiling algorithm (kZS), using the measurement of surface echo as a constraint on total path integrated attenuation, for rainfall retrieval from a spaceborne radar was presented and discussed by C. Matzler (1987). Omitting other causes of errors previously examined, the present authors focus specifically on possible bias due to nonuniform beam filling effects. This problem is studied analytically to identify the physical origin of the biasing terms. In addition, bias in rainfall profile estimates is quantified through simulations of Ku-band spaceborne radar data processing, featuring the intercept of a raincell model by the downward looking radar beam
Keywords :
atmospheric techniques; radar theory; rain; remote sensing by radar; Ku-band; bias; cross-beam resolution effects; data processing; downward looking radar beam; nonuniform beam filling; performance; raincell model; rainfall rate profile retrieval; range profiling algorithm; remote sensing; spaceborne radar; surface echo; total path integrated attenuation; Algorithm design and analysis; Attenuation; Filling; Frequency; Integrated circuit modeling; Radar antennas; Radar measurements; Rain; Reflectivity; Spaceborne radar;
Journal_Title :
Geoscience and Remote Sensing, IEEE Transactions on
