Barreal Blanco
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The Barreal Blanco site is located in the San Juan Province in northwest Argentina. It is a small homogeneous bright site that may be prone to saturation during times of high sun angle but exhibits low temporal spectral variations (less than 3-4 percent in the visible spectral region). However, there are several uniform areas that are limited to 0.5 km by 0.5 km or less. One study found that this site has very low Aerosol Optical Thickness (AOT) which was also invariant throughout the measurements [1].
This site was used on a joint campaign with Argentina's Comisión Nacional de Actividades Espaciales (CONAE) to calibrate the NASA Earth Observing One (EO-1) satellite’s Advanced Land Imager (ALI) and Hyperion instruments, as well as the Landsat 7 Enhanced Thematic Mapper Plus (ETM+) and the Terra Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) instrument. It is a high-altitude dry lakebed which has been used as vicarious calibration target.
| Location (City, State, Country): |
Barreal Blanco, San Juan, Argentina, South America
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| Landsat WRS - 2 Path / Row: |
232/82
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| Center Latitude (degrees): |
S 31.86
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| Center Longitude (degrees): |
W 69.45
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| CEOS Region of Interest |
S 31.86, W 69.45 Search this area in EarthExplorer (Landsat 8-9 Collection 2 Level-1) - date range, datasets, cloud cover and other criteria can be modified once initial results are returned |
| Size of Usable Area (km): |
0.5 x 0.5
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| Altitude above sea level (meters): |
1,872
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| Purpose: |
Radiometry
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| Co-located Instrumented Networks: |
AERONET
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| Status: |
Active
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- Griffith, D. J., M. Horlent, Guillermo Ibañez, Meena D. Lysko, Minette Lubbe, Azwitamisi E. Mudau, Sandra Torrusio, Venkataraman Sivakumar, and Lufuno M. Vhengani. "Vicarious calibration campaign in Argentina for radiometric calibration of a multispectral imager onboard sumbandila satellite." In 2011 IEEE International Geoscience and Remote Sensing Symposium, pp. 993-996. IEEE, 2011.
- Bacour, C.; Briottet, X.; Bréon, F.-M.; Viallefont-Robinet, F.; Bouvet, M. Revisiting Pseudo Invariant Calibration Sites (PICS) Over Sand Deserts for Vicarious Calibration of Optical Imagers at 20 km and 100 km Scales. Remote Sens. 2019, 11, 1166.
Note: This information has been compiled by the USGS ECCOE Team, using the best sources currently known. Updates will be made as more information becomes available. Please contact eccoe@usgs.gov with any updates you would like to contribute.