SMEX02 Atmospheric Aerosol Optical Properties Data

Metadata Updated: November 25, 2015

This data set consists of observations of atmospheric parameters including spectral aerosol optical depths, precipitable water, sky radiance distributions and aerosol volume, and particle size distribution. Data were collected by the Aerosol Robotic Network (AERONET) program, a federation of ground-based remote sensing aerosol networks composed of automatic sun and sky scanning radiometers. AERONET's goal is to assess aerosol optical properties and validate satellite data. The study site was in the Soil Moisture Experiment 2002 (SMEX02) area of Iowa, USA for the period from 20 June to 17 July 2002.

A sun photometer was set up at a centrally located site within the Walnut Creek watershed for the collection of aerosol optical properties throughout the course of the SMEX02 field campaign. Three levels of data are available: Level 1.0 (unscreened), Level 1.5 (cloud-screened), and Level 2.0 (cloud-screened and quality-assured).

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.

Access & Use Information

Public: This dataset is intended for public access and use. License: U.S. Government Work

Downloads & Resources


Metadata Created Date October 8, 2014
Metadata Updated Date November 25, 2015
Data Update Frequency irregular

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date October 8, 2014
Metadata Updated Date November 25, 2015
Publisher National Aeronautics and Space Administration
Unique Identifier C1580-NSIDCV0
NSIDC User Services
Maintainer Email
Id {$oid: 55942a75c63a7fe59b4971ff}
Public Access Level public
Data Update Frequency irregular
Bureau Code 026:00
Metadata Context
Schema Version
Catalog Describedby
Harvest Object Id 4638a06a-154d-4ba6-98a2-1c417f809329
Harvest Source Id 39e4ad2a-47ca-4507-8258-852babd0fd99
Harvest Source Title NASA Data.json
Data First Published 2004-08-18T12:00:00.000Z
Homepage URL
Language en-US
Metadata Type geospatial
Data Last Modified 2009-10-08T12:00:00.000Z
Program Code 026:001
Source Datajson Identifier True
Source Hash 5f640463ea320fd778b5f15542a7243ba1cc4ee8
Source Schema Version 1.1
Spatial <?xml version="1.0" encoding="UTF-8"?><gml:LineString xmlns:gml="" srsName="EPSG:9825">41.0 -93.0 56.0 -93.0</gml:LineString>
Temporal 2002-06-19T01:00:00Z/2002-07-18T23:59:59Z
Category geospatial

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