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Photographing the Earth from the International Space Station

Astronaut Photography of Earth - Display Record

ISS007-E-15177

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File NameFile Size (bytes)WidthHeightAnnotatedCroppedPurposeComments
View ISS007-E-15177.JPG 85729540540 Yes Yes NASA's Earth Observatory web site
View ISS007-E-15177.JPG 85729540540 Yes Yes NASA's Earth Observatory web site
View ISS007-E-15177.JPG 89503639435 No No
View ISS007-E-15177.JPG 94149435540 Photographic Highlights(resized 540 px images)
View ISS007-E-15177_2.JPG 170840619768 Photographic Highlights(actual files used)
View ISS007-E-15177.JPG 121122330322064 No No
View ISS007-E-15177.JPG 163125910001236 No Yes NASA's Earth Observatory web siteColor adjusted
View ISS007-E-15177_2.JPG 634486761444068 No No PresentationEarth Sciences Results Briefing/Ed Lu
View ISS007-E-15177.JPG 673214130322064 No No Earth From Space collectionColor adjusted

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Electronic Image Data

Camera Files >> No sound file available.

Identification

Mission: ISS007 Roll: E Frame: 15177 Mission ID on the Film or image: ISS007
Country or Geographic Name: BRAZIL
Features: LENCOIS MARANHENSES, DUNES
Center Point: Latitude: -2.5 Longitude: -43.0 (Negative numbers indicate south for latitude and west for longitude)

Stereo: (Yes indicates there is an adjacent picture of the same area)
ONC Map ID: JNC Map ID:

Camera

Camera Tilt: 22
Camera Focal Length: 400mm
Camera: E4: Kodak DCS760C Electronic Still Camera
Film: 3060E : 3060 x 2036 pixel CCD, RGBG array.

Quality

Film Exposure:
Percentage of Cloud Cover: 10 (0-10)

Nadir

GMT Date: 20030921 (YYYYMMDD) GMT Time: 194325 (HHMMSS)
Nadir Point Latitude: -1.7, Longitude: -44.1 (Negative numbers indicate south for latitude and west for longitude)

Nadir to Photo Center Direction: Southeast
Sun Azimuth: 271 (Clockwise angle in degrees from north to the sun measured at the nadir point)
Spacecraft Altitude: 205 nautical miles (380 km)
Sun Elevation Angle: 16 (Angle in degrees between the horizon and the sun, measured at the nadir point)
Orbit Number: 3609

Captions

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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