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Global Radiometry Test Sites Network

Explore a network of instrumented and pseudo-invariant sites worldwide used for radiometric gain calibration and sensor cross-comparison. These sites provide a harmonized platform for international efforts to evaluate sensor biases and long-term stability.

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Global Radiometry Test Sites Network

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  1. http://calval.cr.usgs.gov/sites_catalog_map.php

  2. Test Sites Gallery

  3. Radiometry Sites

  4. Online Catalog Example:Railroad Valley Playa, North America

  5. Reference Standard Test Sites • Instrumented Sites: • These instrumented sites are primarily used for field campaigns to obtain radiometric gain and these sites can serve as a focus for international efforts, facilitating traceability and cross-comparison to evaluate biases of in-flight and future sensors in a harmonized manner • Pseudo-invariant Sites: • The pseudo-invariant desert sites have high reflectance and are usually made up of sand dunes with low aerosol loading and practically no vegetation • Consequently, these pseudo-invariant reference standard test sites can be used to evaluate the long-term stability of a sensor and to facilitate cross-comparison of multiple sensors

  6. “Instrumented” Sites Railroad Valley Ivanpah Lspec La Crau Dunhuang Negev Tuz Golu Dome C

  7. “Pseudo-Invariant” Sites • Libya 4 • Mauritania 1/2 • Algeria 3 • Libya 1 • Algeria 5 Libya 4 Mauritania 2 Libya 1 Algeria 5 Algeria 3

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