Next-Generation Radar (NEXRAD) Weather Surveillance Radar 1988 (WSR-88D) measurements were used to support AMSR-E rainfall validation efforts in Eureka, California, USA. WSR-88D radar has a measurement range radius of 150-200 km. It measures instantaneous rain rate, stratiform/convective rain type, in addition to radar reflectivity, with a 2 km resolution for most products. Level 2 and level 3 products are available from NOAA National Climatic Data Center.
The Advanced Microwave Scanning Radiometer - Earth Observing System (AMSR-E) is a mission instrument launched aboard NASA's Aqua Satellite on 04 May 2002. AMSR-E validation studies linked to rainfall experiments are designed to evaluate the accuracy of AMSR-E precipitation data.