Arabia 1
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The region of Arabia 1 contains dunes at several scales across the entire area, but also consists of reasonably spatially homogeneous areas, especially north and northwest of the center coordinates. Overall, the area is very uniform in intensity and saturation, although the surface appears lighter in intensity toward the east. The driest season is spring for the western sites, and summer for the eastern sites of Arabia. A recent study [1] found that, among the 20 Cosnefroy sites [2], the Arabia 1 site shows better performance with respect to temporal and spatial stability.
Arabia 1 can potentially be used as calibration test sites in the solar reflected spectrum. Such sites have been used previously to monitor the calibration temporal drifts of the AVHRR (Holben et al., 1990; Staylor, 1990; Santer et al., 1991; Kaufman and Holben, 1993; Santer and Roger,1993; Cabot et al., 1994), Meteosat (Dedieu, 1992; Cabot et al., 1994) and HRV ~ /Spot sensors (Henry et al., 1993). In the recent years, the site has been used for vicarious method-based calibration as well as cross-calibration.
| Location (City, State, Country): |
Najran, Saudi Arabia, Asia
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|---|---|
| Landsat WRS - 2 Path / Row: |
165/47
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| Center Latitude (degrees): |
N 18.88
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| Center Longitude (degrees): |
E 46.76
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| CEOS Region of Interest |
N 18.88, E 46.76 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): |
50 x 50
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| Altitude above sea level (meters): |
2,223
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| Purpose: |
Radiometry
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| Status: |
Active
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- Bacour, Cédric, Xavier Briottet, François-Marie Bréon, Françoise Viallefont-Robinet, and Marc Bouvet. "Revisiting Pseudo Invariant Calibration Sites (PICS) over sand deserts for vicarious calibration of optical imagers at 20 km and 100 km scales." Remote Sensing 11, no. 10 (2019): 1166.
- Cosnefroy, Helene, Marc Leroy, and Xavier Briottet. "Selection and characterization of Saharan and Arabian desert sites for the calibration of optical satellite sensors." Remote Sensing of Environment 58, no. 1 (1996): 101-114.
- Bhatt, R., D. R. Doelling, B. R. Scarino, A. Gopalan, C. O. Haney, P. Minnis, and K. M. Bedka, 2016: A Consistent AVHRR Visible Calibration Record Based on Multiple Methods Applicable for the NOAA Degrading Orbits. Part I: Methodology. J. Atmos. Oceanic Technol., 33, 2499–2515.
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.