Title :
Standard Deviation of Spatially Averaged Surface Cross Section Data From the TRMM Precipitation Radar
Author :
Meneghini, Robert ; Jones, Jeffrey A.
Author_Institution :
Goddard Space Flight Center, NASA, Greenbelt, MD, USA
fDate :
3/1/2011 12:00:00 AM
Abstract :
We investigate the spatial variability of the normalized radar cross section of the surface (NRCS or σ0) derived from measurements of the Tropical Rainfall Measuring Mission (TRMM) Precipitation Radar (PR) for the period from 1998 to 2009. The purpose of this letter is to understand the way in which the sample standard deviation (SSD) of the σ0 data changes as a function of spatial resolution, incidence angle, and surface type (land/ocean). The results have implications regarding the accuracy by which the path-integrated attenuation (PIA) from precipitation can be inferred by the use of surface-scattering properties.
Keywords :
hydrological techniques; radar cross-sections; rain; remote sensing by radar; AD 1998 to 2009; TRMM precipitation radar; Tropical Rainfall Measuring Mission; atmospheric attenuation; incidence angle; normalized radar cross section; path-integrated attenuation; sample standard deviation; spatial resolution; spatially averaged surface cross section data; surface type; surface-scattering properties; Atmospheric attenuation; Tropical Rainfall Measuring Mission (TRMM) Precipitation Radar (PR); normalized radar cross section (NRCS); surface cross section;
Journal_Title :
Geoscience and Remote Sensing Letters, IEEE
DOI :
10.1109/LGRS.2010.2064755
