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			Photo #: STS061-75-23 Date: Dec. 1993 Geographic Region: NIGERIA Feature: L. CHAD, RIVER, DESERT



	STS061-075-023 Lake Chad (North Basin), Chad December 1993 The north basin of Lake Chad shows little evidence of vegetation. Agriculture occurs in a few fragmented areas, primarily in the lowland dunes. This photograph shows water conditions that have prevailed in the north basin during the decades of 1980s and 1990s. The last major documentation of substantial water in the north basin was obtained when Apollo astronauts collected photographs of this lake in the late 1960s. The light tan areas northwest of the basin are classified as salty, dry lakebeds. Most of the moisture that reaches the north basin is provided by intermittently flowing rivers that enter the lake from the west-southwest. (Refer to photograph STS-061-075-022 to see extensive vegetation and standing water in the south basin.)

Images:	All Available Images Low-Resolution 155k
Mission:	STS061
Roll - Frame:	75 - 23
Geographical Name:	NIGERIA
Features:	L. CHAD, RIVER, DESERT
Center Lat x Lon:	14.0N x 13.5E
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:	22	LO=Low Oblique, HO=High Oblique, NV=Near Vertical
Camera Focal Length:	40
Nadir to Photo Center Direction:	W	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:	15
Date:	19931203	YYYYMMDD
Time:	080052	GMT HHMMSS
Nadir Lat:	13.6N	Latitude of suborbital point of spacecraft
Nadir Lon:	15.4E	Longitude of suborbital point of spacecraft
Sun Azimuth:	130	Clockwise angle in degrees from north to the sun measured at the nadir point
Space Craft Altitude:	290	nautical miles
Sun Elevation:	36	Angle in degrees between the horizon and the sun, measured at the nadir point
Land Views:	BASIN, DESERT, DUNE
Water Views:	LAKE, RIVER, DELTA
Atmosphere Views:
Man Made Views:
City Views:

Associated Photos in Sequence:

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

Photo #: STS052-99-9
Description: AFRICA, LAKE CHAD-1992--LAKE LEVELS FROM DROUGHT THAT BEGAN IN 1970
Sequence ID: 3B

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

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

Photo #: STS061-75-23 ** Currently displayed photo **
Description: AFRICA, LAKE CHAD-1993--LAKE LEVELS FROM DROUGHT THAT BEGAN IN 1970
Sequence ID: 3E

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