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			Photo #: STS008-33-993 Date: na 1983 Geographic Region: BOTSWANA Feature: ZAMBEZI & CHOBE RIVER



	At the junction of the Chobe and Zambezi Rivers, Botswana, increasing elephant populations are having large impacts on local vegetation. Scientists working in the region used spectral analysis of an astronaut photograph digitized from film to identify areas where woodland vegetation had been heavily damaged by the elephants. The technique used the analysis of texture of the red band (or channel) in the image. In the image above, the natural color photo has been combined with a texture analysis of the red band. The lighter colored areas near the labels a, b and c represent the areas with the heaviest elephant damage. Field teams working on the ground verified the presence of damage. This image is one of the examples of the applications of astronaut photography to conservation biology presented in a paper by Robinson et al. in the August 2001 issue of the scientific journal Conservation Biology. The paper is part of a special section on "Contributions of Remote Sensing to Biodiversity Conservation" (//www.conbio.org/scb/Services/Tips/2001-4-August.cfm) featuring a number of different NASA-sponsored studies.

Images:	All Available Images Low-Resolution 65k
Mission:	STS008
Roll - Frame:	33 - 993
Geographical Name:	BOTSWANA
Features:	ZAMBEZI & CHOBE RIVER
Center Lat x Lon:	18S x 25.0E
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:	LO	LO=Low Oblique, HO=High Oblique, NV=Near Vertical
Camera Focal Length:	100
Nadir to Photo Center Direction:		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:	33
Date:	1983____	YYYYMMDD
Time:		GMT HHMMSS
Nadir Lat:	N	Latitude of suborbital point of spacecraft
Nadir Lon:	E	Longitude of suborbital point of spacecraft
Sun Azimuth:		Clockwise angle in degrees from north to the sun measured at the nadir point
Space Craft Altitude:		nautical miles
Sun Elevation:		Angle in degrees between the horizon and the sun, measured at the nadir point
Land Views:
Water Views:	RIVER
Atmosphere Views:
Man Made Views:
City Views:

Photo is not associated with any sequences

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