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Astronaut Photography of Earth - Display Record

STS052-80-66

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Identification

Mission: STS052 Roll: 80 Frame: 66 Mission ID on the Film or image: STS52
Country or Geographic Name: NIGERIA
Features: LAKE CHAD
Center Point Latitude: 13.0 Center Point Longitude: 14.0 (Negative numbers indicate south for latitude and west for longitude)
Stereo: Yes (Yes indicates there is an adjacent picture of the same area)
ONC Map ID: JNC Map ID:

Camera

Camera Tilt: Low Oblique
Camera Focal Length: 100mm
Camera: HB: Hasselblad
Film: 5017 : Kodak, natural color positive, Ektachrome, X Professional, ASA 64, standard base.

Quality

Film Exposure: Normal
Percentage of Cloud Cover: 0 (0-10)

Nadir

Date: 199210__ (YYYYMMDD)GMT Time: (HHMMSS)
Nadir Point Latitude: , Longitude: (Negative numbers indicate south for latitude and west for longitude)
Nadir to Photo Center Direction:
Sun Azimuth: (Clockwise angle in degrees from north to the sun measured at the nadir point)
Spacecraft Altitude: nautical miles (0 km)
Sun Elevation Angle: (Angle in degrees between the horizon and the sun, measured at the nadir point)
Orbit Number:

Captions

STS052-080-066 Lake Chad, Africa November 1992
With standing water visible only in its southern basin, Lake Chad can be seen in this south-southeast-looking, low-oblique view. A major drought, which has been under way since 1970 with few interruptions, has plagued this and other regions of northern Africa. The northern basin, which is very vulnerable to any fluctuations in the climate, has dried and shrunk, displaying many sand dunes. The darker areas visible within the northern basin are marshland and swampland with dense scrub-type vegetation. The flow of the Komadugu Gana River into the northern basin of the lake from the west has also been reduced by the prolonged drought. In the southern basin of the lake, and especially in the eastern part of the lake, many sand dunes or islets can be seen scattered throughout. The flow of water into the southern basin from the Chari River has also been reduced by the prolonged drought. The average depth of the southern basin has been reduced to less than 15 feet (4.5 meters) compared to its average depth in 1968 of 20 feet (6 meters). To the east of Lake Chad, the sand of the Manga Desert is visible. Due to the prevailing wind, the sand is moving westward. Encroaching sand can already be seen as light-colored material moving into the eastern portions of the northern basin. (See AS7-008-1932 for a photograph that shows the condition of Lake Chad before the prolonged drought began in 1970.)

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