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Astronaut Photography of Earth - Display Record
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IdentificationMission: ISS010 Roll: E Frame: 5266 Mission ID on the Film or image: ISS010
Country or Geographic Name: LIBYA
Features: AL KHUFRAH OASIS, AGR., ROADS
Center Point Latitude: 24.0 Center Point Longitude: 23.5 (Negative numbers indicate south for latitude and west for longitude)
Stereo: (Yes indicates there is an adjacent picture of the same area)
ONC Map ID: JNC Map ID:
CameraCamera Tilt: 19
Camera Focal Length: 180mm
Camera: E4: Kodak DCS760C Electronic Still Camera
Film: 3060E : 3060 x 2036 pixel CCD, RGBG array.
Percentage of Cloud Cover: 10 (0-10)
NadirDate: 20041028 (YYYYMMDD)GMT Time: 065827 (HHMMSS)
Nadir Point Latitude: 23.9, Longitude: 24.6 (Negative numbers indicate south for latitude and west for longitude)
Nadir to Photo Center Direction: West
Sun Azimuth: 124 (Clockwise angle in degrees from north to the sun measured at the nadir point)
Spacecraft Altitude: 195 nautical miles (361 km)
Sun Elevation Angle: 31 (Angle in degrees between the horizon and the sun, measured at the nadir point)
Orbit Number: 1922
CaptionsGreen circles in the desert frequently indicate tracts of agriculture supported by center-pivot irrigation. The Al Khufrah Oasis in southeastern Libya (near the Egyptian border) is one of Libya’s largest agricultural projects, and is an easy-to-recognize landmark for orbiting astronauts aboard the International Space Station. Because only about 2 percent of Libya’s land receives enough rainfall to be cultivated, this project uses fossil water from a large underground aquifer. The Libyan government also has a plan called the Great Man Made River to pump and transport these groundwater reserves to the coast to support Libya’s growing population and industrial development.
The center-pivot irrigation system pumps water under pressure into a gantry or tubular arm from a central source. Anchored by a central pivot, the gantry slowly rotates over the area to be irrigated, thereby producing the circular patterns. Although the field diameters vary, these fields are approximately 0.6 mile (1 kilometer) in diameter. Darker colors indicate fields where such crops as wheat and alfalfa are grown. Lighter colors can indicate a variety of agricultural processes: fields that have been harvested recently; fields that are lying fallow; fields that have just been planted; or fields that have been taken out of production.
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