---
access_dt: ~
aliases:
  - context: dataset
    lexicon: nsidc
    term: oai:nsidc/NSIDC-0189
    url: http://nsidc.org/api/dataset/2/oai?verb=GetRecord&metadataPrefix=dif&identifier=oai:nsidc/NSIDC-0189
attributes: ~
cite_metadata: ~
cited_by: []
contributors:
  - display_name: 'Data Archive : National Snow & Ice Data Center Distributed Active Archive Center '
    href: http://52.38.26.42:8080/contributor/4440.yaml
    id: 4440
    organization:
      country_code: US
      display_name: National Snow & Ice Data Center Distributed Active Archive Center
      identifier: national-snow-ice-data-center-distributed-active-archive-center
      name: National Snow & Ice Data Center Distributed Active Archive Center
      organization_type_identifier: federal
      type: organization
      url: http://nsidc.org/daac
    organization_uri: /organization/national-snow-ice-data-center-distributed-active-archive-center
    person: {}
    person_id: ~
    person_uri: ~
    role_type_identifier: data_archive
    uri: /contributor/4440
data_qualifier: ~
description: "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 Vegetation Water Content (VWC) data. VWC was derived from Normalized Difference Water Index (NDWI), which was derived from Landsat 5 Thematic Mapper (TM) and Landsat 7 Enhanced Thematic Mapper plus (ETM+) imagery. The TM 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 Iowa, USA. Data are provided as flat binary files and are available via FTP. Data must be divided by 25.5 to obtain the actual vegetation water content in kg/m<sup>3</sup>. 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."
description_attribution: ~
display_name: 'SMEX02 Vegetation Water Content, Iowa Regional and Walnut Creek Watershed'
doi: 10.5067/0X2GRYXDM3EA
end_time: 2003-07-18T00:00:00
files: []
href: http://52.38.26.42:8080/dataset/nasa-nsidcdaac-0189.yaml
identifier: nasa-nsidcdaac-0189
instrument_measurements:
  - dataset_identifier: nasa-nsidcdaac-0189
    display_name: landsat-7/enhanced-thematic-mapper-plus/nasa-nsidcdaac-0189
    instrument_identifier: enhanced-thematic-mapper-plus
    platform_identifier: landsat-7
    type: instrument_measurement
  - dataset_identifier: nasa-nsidcdaac-0189
    display_name: landsat-5/thematic-mapper/nasa-nsidcdaac-0189
    instrument_identifier: thematic-mapper
    platform_identifier: landsat-5
    type: instrument_measurement
lat_max: 42.732
lat_min: 41.694
lon_max: -93.161
lon_min: -93.841
name: 'SMEX02 Vegetation Water Content, Iowa Regional and Walnut Creek Watershed'
native_id: NSIDC-0189
parents: []
processing_level: ~
publication_year: ~
references: []
release_dt: 2003-09-30T00:00:00
scale: ~
scope: ~
spatial_extent: ~
spatial_ref_sys: ~
spatial_res: ~
start_time: 2003-06-25T00:00:00
temporal_extent: ~
temporal_resolution: ~
type: dataset
uri: /dataset/nasa-nsidcdaac-0189
url: http://nsidc.org/data/NSIDC-0189
variables: ~
version: ~
vertical_extent: ~