La Crau
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The La Crau site is about 50 kilometers (km) northwest of Marseille, France off the coast of the Mediterranean Sea. This is one of eight instrumented sites that are Committee on Earth Observation Satellites (CEOS) reference test sites. The area has a dry and sunny Mediterranean climate. The soil is composed of pebbles and is sparsely covered by a low vegetation [1]. Overall, the area near the site is relatively homogeneous, but imagery may be saturated due to the possibility of atmospheric water vapor and aerosol problems.
La Crau has been used for vicarious and absolute calibration of different satellite sensors such as Sentinel-2/MSI, along with its on-board calibrator [1], and Landsat 8 OLI. La Crau has also been used for longstanding calibration analysis by the Satellite Pour l’Observation de la Terre–Végétation (SPOT) cameras. The site has been analyzed in vicarious calibration and validation by the Modular Optoelectronic Multispectral Scanner (MOMS)-2P-camera onboard the Russian Mir space station and by the High-Resolution Visible (HRV) cameras on the SPOT satellites and Sentinel-2 [2].
| Location (City, State, Country): |
La Crau, France, Europe
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|---|---|
| Landsat WRS - 2 Path / Row: |
196/30
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| Center Latitude (degrees): |
N 43.56
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| Center Longitude (degrees): |
E 4.86
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| CEOS Region of Interest |
N 43.56 E 4.86 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): |
1 x 2
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| Altitude above sea level (meters): |
28
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| Purpose: |
Radiometry
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| Co-located Instrumented Networks: |
AERONET
RadCalNet
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| Status: |
Active
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- Shrestha, Mahesh, Dennis Helder, and Jon Christopherson. 2021. "DLR Earth Sensing Imaging Spectrometer (DESIS) Level 1 Product Evaluation Using RadCalNet Measurements" Remote Sensing 13, no. 12: 2420. https://doi.org/10.3390/rs13122420
- Bouvet, Marc, Kurtis Thome, Béatrice Berthelot, Agnieszka Bialek, Jeffrey Czapla-Myers, Nigel P. Fox, Philippe Goryl, Patrice Henry, Lingling Ma, Sébastien Marcq, Aimé Meygret, Brian N. Wenny, and Emma R. Woolliams. 2019. "RadCalNet: A Radiometric Calibration Network for Earth Observing Imagers Operating in the Visible to Shortwave Infrared Spectral Range" Remote Sensing 11, no. 20: 2401. https://doi.org/10.3390/rs11202401
- Six, Catherine. "Station automatique de mesures pour l'étalonnage en vol des capteurs satellitaires: application à SPOT/HRV sur le site de La Crau." Université du Littoral Côte d'Opale, 2002.
- Charlotte Revel, Vincent Lonjou, Sébastien Marcq, Camille Desjardins, Bertrand Fougnie, Céline Coppolani-Delle Luche, Nicolas Guilleminot, Anne-Sophie Lacamp, Emmanuel Lourme, Christine Miquel & Xavier Lenot (2019) Sentinel-2A and 2B absolute calibration monitoring, European Journal of Remote Sensing, 52:1, 122-137, DOI: 10.1080/22797254.2018.1562311
- Rondeaux, G., M.D. Steven, J.A. Clark, and G Mckay. “La Crau: A European Test Site for Remote Sensing Validation.” Taylor & Francis. https://www.tandfonline.com/doi/abs/10.1080/014311698214505
- Milton, E.J.. (2008). The Network for Calibration and Validation in Earth Observation (NCAVEO) 2006 field campaign.
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.