---
access_dt: ~
aliases:
  - context: dataset
    lexicon: nsidc
    term: oai:nsidc/NSIDC-0340
    url: http://nsidc.org/api/dataset/2/oai?verb=GetRecord&metadataPrefix=dif&identifier=oai:nsidc/NSIDC-0340
attributes: ~
cite_metadata: ~
cited_by: []
contributors:
  - href: https://data.globalchange.gov/contributor/4440.yaml
    id: 4440
    organization:
      country_code: US
      identifier: national-snow-ice-data-center-distributed-active-archive-center
      international: ~
      name: National Snow & Ice Data Center Distributed Active Archive Center
      organization_type_identifier: federal
      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 includes data collected over the Soil Moisture Experiment 2004 (SMEX04) area of Sonora, Mexico during 1 June to 30 September 2004. The SeaWinds scatterometer on NASA's Quick Scatterometer (QuikSCAT) satellite collected backscatter data. Data are provided in Brigham Young University - Microwave Earth Remote Sensing (BYU-MERS) Scatterometer Image Reconstruction (SIR) images and Graphics Interchange Format (GIF) images, 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."
description_attribution: http://nsidc.org/data/amsr_validation/soil_moisture/index.html
doi: 10.5067/KUPSUNBZQ3ZQ
end_time: 2004-09-30T00:00:00
files: []
gcmd_keywords: []
href: https://data.globalchange.gov/dataset/nasa-nsidcdaac-0340.yaml
identifier: nasa-nsidcdaac-0340
instrument_measurements: []
lat_max: 35
lat_min: 20
lon_max: -105
lon_min: -115
name: 'SMEX04 QuikSCAT/SeaWinds Backscatter Data: Sonora'
native_id: NSIDC-0340
parents: []
processing_level: ~
publication_year: ~
references: []
regions: []
release_dt: 2008-04-30T00:00:00
scale: ~
scope: ~
spatial_extent: ~
spatial_ref_sys: ~
spatial_res: ~
start_time: 2004-06-01T00:00:00
temporal_extent: ~
temporal_resolution: ~
type: ~
uri: /dataset/nasa-nsidcdaac-0340
url: http://nsidc.org/data/NSIDC-0340
variables: ~
version: ~
vertical_extent: ~