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Spacecraft nadir point: 13.0° N, 32.6° E

Photo center point: 14.0° N, 33.5° E

Nadir to Photo Center: Northeast

Spacecraft Altitude: 192 nautical miles (356km)
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Image Caption:
S49-77-072, S49-96-003 - Khartoum Region, Sudan Two near-vertical
photographs of the irrigated agricultural area south of Khartoum,
Sudan, are part of a series of more than a dozen frames. The Blue
Nile, which bounds the agricultural area on the east, can be seen
traversing the photographs from bottom (south) to top (north) of
the color-infrared (CIR) photograph; and from lower right to
upper left of the color photograph. The agricultural region con-
tains thousands of rectangular fields bounded by canals, which
carry water from both the Blue and White Niles. A rotation system
is used for soil fallow and pest control, so that part of the
fields will be vacant while others contain crops (cotton, durra
[what's that?], and millet). The CIR photograph helps identify
fields having actively-growing crops (for example, top center on
the east side of the river), helps identify natural vegetation
along the stream, and tends to cut haze because it is used with a
"minus-blue" filter. Hasselblad cameras, 250 lenses.

This herringbone pattern of irrigated agricultural fields near Khartoum, Sudan (14.5N, 33.5E) was imaged with infrared film as part an experiment to compare the merits of color film versus color infrared film. Color film presents the image as it appears to the eye whereas color infrared film has an excellent haze penetration and vegetation definition capability. See color film image STS049-77-072 for a detailed scene description.