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  Image: Geographic Location Direction Photo #: STS052-99-9 Date: Oct. 1992
Geographic Region: CHAD
Feature: LAKE CHAD

Ordering information for space photography
 
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  STS052-099-009 Lake Chad, Chad October 1992
The four north-central African countries of Chad, Niger, Nigeria, and Cameroon share a common featureóborders that extend into Lake Chad. Millions of years ago, Lake Chad encompassed more than 100 000 square miles (260 000 square kilometers) in central Africa. This low-oblique, color infrared photograph shows approximately 965 square miles (2500 square kilometers) of open water in the south basin (blue). Since the mid-1970s, only the south basin has had open water; many sand dunes cover the former lake floor, forming inlets into the remaining area of open water. Climatic changes, dynamic shifts in the Earthís crust, and evaporation interacted to reduce the lakeís surface area. The Chari River, with its substantial delta on the southern side of the lake, supplies approximately 95 percent of the lakeís water. The Komadougou Yobe River of Niger and its ephemeral tributary streams enter the northern basin of Lake Chad along the western shoreline, but no large areas of vegetation exist in the north basin. In contrast, the south basin shows a large area of vigorous vegetation (reddish and darker areas). (Refer to STS-061-075-022, AS7-008-1932, and STS-026-043-098 to further document the changes occurring in Lake Chad.)
 
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Images: All Available Images Low-Resolution 151k
Mission: STS052  
Roll - Frame: 99 - 9
Geographical Name: CHAD  
Features: LAKE CHAD  
Center Lat x Lon: 13.0N x 14.0E
Film Exposure: N   N=Normal exposure, U=Under exposed, O=Over exposed, F=out of Focus
Percentage of Cloud Cover-CLDP: 0
 
Camera: HB
 
Camera Tilt: 29   LO=Low Oblique, HO=High Oblique, NV=Near Vertical
Camera Focal Length: 100  
 
Nadir to Photo Center Direction: NW   The direction from the nadir to the center point, N=North, S=South, E=East, W=West
Stereo?: Y   Y=Yes there is an adjacent picture of the same area, N=No there isn't
Orbit Number: 62  
 
Date: 19921026   YYYYMMDD
Time: 131210   GMT HHMMSS
Nadir Lat: 12.2N  
Latitude of suborbital point of spacecraft
Nadir Lon: 15.2E  
Longitude of suborbital point of spacecraft
Sun Azimuth: 237   Clockwise angle in degrees from north to the sun measured at the nadir point
Space Craft Altitude: 157   nautical miles
Sun Elevation: 45   Angle in degrees between the horizon and the sun, measured at the nadir point
Land Views: DESERT, PLAIN, DUNE  
Water Views: RIVER, DELTA, LAKE, SWAMP  
Atmosphere Views:  
Man Made Views:  
City Views:  
Associated Photos in Sequence:

IMAGEPhoto #: AS07-8-1932
Description: AFRICA, LAKE CHAD-1968--LAKE LEVELS BEFORE BEGINNING OF DROUGHT, 1970
Sequence ID: 3A

IMAGEPhoto #: STS052-99-9 ** Currently displayed photo **
Description: AFRICA, LAKE CHAD-1992--LAKE LEVELS FROM DROUGHT THAT BEGAN IN 1970
Sequence ID: 3B

IMAGEPhoto #: STS052-80-66
Description: AFRICA, LAKE CHAD-1992--LAKE LEVELS FROM DROUGHT THAT BEGAN IN 1970
Sequence ID: 3C

IMAGEPhoto #: STS061-75-22
Description: AFRICA, LAKE CHAD-1993--LAKE LEVELS FROM DROUGHT THAT BEGAN IN 1970
Sequence ID: 3D

IMAGEPhoto #: STS061-75-23
Description: AFRICA, LAKE CHAD-1993--LAKE LEVELS FROM DROUGHT THAT BEGAN IN 1970
Sequence ID: 3E



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