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  Image: Geographic Location Direction Photo #: ISS007-E-15177 Date: Sep. 2003
Geographic Region: BRAZIL
Feature: LENCOIS MARANHENSES, DUNES

Ordering information for space photography
 
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  View Low-Resolution Image  
  The area shown here (10 km across) is a small part of the dune field which is now protected as the LenÁůis Maranhenses National Park, on Brazilís north coast, about 700 km east of the Amazon River mouth. Persistent winds blow off the equatorial Atlantic Ocean onto Brazil from the east, driving white sand inland from the 100 km stretch of coast (upper margin of the image), to form a large field of dunes. The strongly regular pattern of these dunes is a common characteristic of dune fields. The basic shape of each sand mass, repeated throughout the view, is a crescent-shaped dune. In an area with a rich supply of sand such as coastal Brazil, individual crescents coalesce to form entire chains many miles long. The wind strength and supply of sand are sufficient to keep the dunes active, and thus free of vegetation, despite 1500 mm (60 inches) of rainfall annually. The dark areas between the white dunes are fresh water ponds that draw fisherman to this newly established park.

The characteristic regularity of the dune landscape can be detected downwind (west) for more than 100 km, beyond the present dune field. Now covered by dense forest, the greater extent of this dune field indicates that climates have been substantially drier at the Equator in the recent geological past.
 
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Images: All Available Images Low-Resolution 83k
Mission: ISS007  
Roll - Frame: E - 15177
Geographical Name: BRAZIL  
Features: LENCOIS MARANHENSES, DUNES  
Center Lat x Lon: 2.5S x 43W
Film Exposure:   N=Normal exposure, U=Under exposed, O=Over exposed, F=out of Focus
Percentage of Cloud Cover-CLDP: 10
 
Camera: E4
 
Camera Tilt: 22   LO=Low Oblique, HO=High Oblique, NV=Near Vertical
Camera Focal Length: 400  
 
Nadir to Photo Center Direction: SE   The direction from the nadir to the center point, N=North, S=South, E=East, W=West
Stereo?:   Y=Yes there is an adjacent picture of the same area, N=No there isn't
Orbit Number: 3609  
 
Date: 20030921   YYYYMMDD
Time: 194325   GMT HHMMSS
Nadir Lat: 1.7S  
Latitude of suborbital point of spacecraft
Nadir Lon: 44.1W  
Longitude of suborbital point of spacecraft
Sun Azimuth: 271   Clockwise angle in degrees from north to the sun measured at the nadir point
Space Craft Altitude: 205   nautical miles
Sun Elevation: 16   Angle in degrees between the horizon and the sun, measured at the nadir point
Land Views: COAST, DUNE  
Water Views: OCEAN, RIVER  
Atmosphere Views:  
Man Made Views:  
City Views:  
Photo is not associated with any sequences


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