---
access_dt: ~
aliases:
  - context: dataset
    lexicon: nsidc
    term: oai:nsidc/NSIDC-0577
    url: http://nsidc.org/api/dataset/2/oai?verb=GetRecord&metadataPrefix=dif&identifier=oai:nsidc/NSIDC-0577
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 comprised of browse images acquired over the regional study areas of Alabama, Georgia, and Oklahoma USA as part of the 2003 Soil Moisture Experiment (SMEX03). The experiment was conducted from March through July 2003 via the Advanced Synthetic Aperture Radar (ASAR) instrument on board the European Space Agency's (ESA) Environmental Satellite (ENVISAT). Cross-polarized C-band ASAR images were acquired in order to obtain a backscatter coefficient measurement over a range of natural vegetation types. However, the images provided here are only browse images and therefore cannot be used to derive backscatter coefficient values. Researchers interested in backscatter coefficient values must obtain the ASAR data. The total volume for this combined data set is approximately 65 megabytes. Data are available via FTP and are provided as JPEG image files and JGW georeference files. Also included and available via FTP are the following types of header files: HAN files, ASCII text files, and INI files. 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: 'SMEX03 ENVISAT ASAR Data, Oklahoma'
doi: 10.5067/YXYV5M9B6I1J
end_time: 2003-07-15T00:00:00
files: []
href: http://52.38.26.42:8080/dataset/nasa-nsidcdaac-0577.yaml
identifier: nasa-nsidcdaac-0577
instrument_measurements:
  - dataset_identifier: nasa-nsidcdaac-0577
    display_name: environmental-satellite/advanced-synthetic-aperture-radar/nasa-nsidcdaac-0577
    instrument_identifier: advanced-synthetic-aperture-radar
    platform_identifier: environmental-satellite
    type: instrument_measurement
lat_max: 35.61
lat_min: 34.47
lon_max: -97.31
lon_min: -98.53
name: 'SMEX03 ENVISAT ASAR Data, Oklahoma'
native_id: NSIDC-0577
parents: []
processing_level: ~
publication_year: ~
references: []
release_dt: 2013-11-14T00:00:00
scale: ~
scope: ~
spatial_extent: ~
spatial_ref_sys: ~
spatial_res: ~
start_time: 2003-03-26T00:00:00
temporal_extent: ~
temporal_resolution: ~
type: dataset
uri: /dataset/nasa-nsidcdaac-0577
url: http://nsidc.org/data/NSIDC-0577
variables: ~
version: ~
vertical_extent: ~