ISS010-E-5266
| NASA Photo ID | ISS010-E-5266 |
| Focal Length | 180mm |
| Date taken | 2004.10.28 |
| Time taken | 06:58:27 GMT |
Resolutions offered for this image:
1000 x 1298 pixels 540 x 701 pixels 540 x 540 pixels 3032 x 2064 pixels 639 x 435 pixels
1000 x 1298 pixels 540 x 701 pixels 540 x 540 pixels 3032 x 2064 pixels 639 x 435 pixels
Cloud masks available for this image:
Spacecraft nadir point: 23.9° N, 24.6° E
Photo center point: 24.0° N, 23.5° E
Photo center point by machine learning:
Photo center point: 24.0° N, 23.5° E
Photo center point by machine learning:
Nadir to Photo Center: West
Spacecraft Altitude: 195 nautical miles (361km)
Country or Geographic Name: | LIBYA |
Features: | AL KHUFRAH OASIS, AGR., ROADS |
| Features Found Using Machine Learning: | |
Cloud Cover Percentage: | 10 (1-10)% |
Sun Elevation Angle: | 31° |
Sun Azimuth: | 124° |
Camera: | Kodak DCS760c Electronic Still Camera |
Focal Length: | 180mm |
Camera Tilt: | 19 degrees |
Format: | 3060E: 3060 x 2036 pixel CCD, RGBG array |
Film Exposure: | |
| Additional Information | |
| Width | Height | Annotated | Cropped | Purpose | Links |
|---|---|---|---|---|---|
| 1000 pixels | 1298 pixels | No | Yes | Earth From Space collection | Download Image |
| 540 pixels | 701 pixels | Yes | Yes | Earth From Space collection | Download Image |
| 540 pixels | 540 pixels | Yes | Yes | NASA's Earth Observatory web site | Download Image |
| 3032 pixels | 2064 pixels | No | No | Download Image | |
| 639 pixels | 435 pixels | No | No | Download Image |
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Image Caption: Green 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.
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.
