_:genid1 . _:genid1 "NSIDC-0184" . _:genid2 . _:genid2 . _:genid2 "42.732"^^ . _:genid2 "41.694"^^ . _:genid2 "-93.161"^^ . _:genid2 "-93.827"^^ . _:genid3 . _:genid3 . _:genid3 "2002-06-06T00:00:00"^^ . _:genid3 "2002-07-17T00:00:00"^^ . "nasa-nsidcdaac-0184" . "SMEX02 Iowa Satellite Vegetation and Water Index (NDVI and NDWI) Data"^^ . "10.5067/2R7KUXDQ3S44" . _:genid1 . . "This data set is part of the Soil Moisture Experiment 2002 (SMEX02) project, which is associated with the Advanced Microwave Scanning Radiometer - Earth Observing System (AMSR-E) validation project. It consists of Normalized Difference Vegetation Index (NDVI) and Normalized Difference Water Index (NDWI) data, derived from Landsat 5 Thematic Mapper (TM) and Landsat 7 Enhanced Thematic Mapper plus (ETM+) imagery. The satellite data were acquired during select dates in June and July 2002. These data cover the SMEX02 Walnut Creek watershed and the regional Iowa study areas in south-central Iowa, USA. Data are provided as flat binary files and are available via FTP. These data were collected as part of a validation study for the Advanced Microwave Scanning Radiometer - Earth Observing System (AMSR-E). AMSR-E is a mission instrument launched aboard NASA's Aqua Satellite on 04 May 2002. AMSR-E validation studies linked to SMEX are designed to evaluate the accuracy of AMSR-E soil moisture data. Specific validation objectives include assessing and refining soil moisture algorithm performance; verifying soil moisture estimation accuracy; investigating the effects of vegetation, surface temperature, topography, and soil texture on soil moisture accuracy; and determining the regions that are useful for AMSR-E soil moisture measurements."^^ . "2003-08-29T00:00:00"^^ . _:genid2 . _:genid3 . . . . _:genid4 . _:genid4 . _:genid4 . _:genid4 . "oai:nsidc/NSIDC-0184" . "http://nsidc.org/api/dataset/2/oai?verb=GetRecord&metadataPrefix=dif&identifier=oai:nsidc/NSIDC-0184" . .