Egypt 1
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The Egypt 1 site is located in the Sahara Desert near a Libyan Pseudo Invariant Calibration Site (PICS). This site shows good spatial and temporal stability (within 3 percent in relative scale) and is one of the 20 sites selected from the Saharan and Arabian desert regions by Cosnefroy et al. (1996) for satellite sensor calibration based on the longstanding spatial uniformity criterion.[1]. According to the study, this site showed very little monthly average precipitation, minimal cloud coverage and moderate seasonal variations.
Egypt 1 has been used for different purposes by calibration groups over the past few years. It has been used by the USGS and its partner, South Dakota State University (SDSU) for radiometric characterization of Landsat Collection 1 products [2] as well as for Landsat absolute radiometric calibration analysis [3]. Egypt 1 is also used for cross- calibration of Landsat with other satellite sensors (e.g. MODIS) [4] and for long term stability monitoring of different satellite sensors [5]. Closest AERONET station: El_Farafra [ 27.06, 27.99], 187.5 km
| Location (City, State, Country): |
Egypt, Africa
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|---|---|
| Landsat WRS - 2 Path / Row: |
179/41
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| Center Latitude (degrees): |
N 27.41
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| Center Longitude (degrees): |
E 26.38
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| CNES Region of Interest |
N 27.22, E 26.00 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 |
| SDSU Region of Interest |
N 26.91, E 26.31 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): |
100 x 100
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| UTM Zone: |
37 N
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| Altitude above sea level (meters): |
226
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| Purpose: |
Radiometry
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| Status: |
Active
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- 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.
- Micijevic, Esad, Md Obaidul Haque, and Nischal Mishra. "Radiometric characterization of Landsat Collection 1 products." In Earth Observing Systems XXII, vol. 10402, p. 104021D. International Society for Optics and Photonics, 2017.
- Helder, Dennis, Kurtis J. Thome, Nischal Mishra, Gyanesh Chander, Xiaoxiong Xiong, Amit Angal, and Taeyoung Choi. "Absolute radiometric calibration of Landsat using a pseudo invariant calibration site." IEEE Transactions on Geoscience and Remote Sensing 51, no. 3 (2013): 1360-1369.
- Angal, Amit, Nischal Mishra, Xiaoxiong Xiong, and Dennis Helder. "Cross-calibration of Landsat 5 TM, and Landsat 8 OLI with Aqua MODIS using PICS." In Earth Observing Systems XIX, vol. 9218, p. 92180K. International Society for Optics and Photonics, 2014.
- Micijevic, Esad, Nischal Mishra, and Dennis Helder. "Assessing Long Term Stability of Landsat 5 TM, Landsat 7 ETM+ and Landsat 8 OLI." (2017).
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.