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Astronaut Photography of Earth - Display Record

ISS004-E-7267

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	File Name	File Size (bytes)	Width	Height	Annotated	Cropped	Purpose	Comments
View	ISS004-E-7267.JPG	63888	639	435	No	No		From STIC, color adjusted
View	ISS004-E-7267.JPG	140634	540	424	Yes	Yes	NASA's Earth Observatory web site
View	ISS004-E-7267_2.JPG	154681	540	425	Yes	Yes	NASA's Earth Observatory web site
View	ISS004-E-7267_3.JPG	157122	540	426	Yes	Yes
View	ISS004-E-7267.JPG	188842	540	404			Photographic Highlights	540 px resized images

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	File Name	File Size (bytes)	Width	Height	Annotated	Cropped	Purpose	Comments
Request	ISS004-E-7267.JPG	734796	1024	767			Photographic Highlights	actual files used
Request	ISS004-E-7267.JPG	944095	3032	2064	No	No		From STIC, color adjusted

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Electronic Image Data

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Identification

Mission: ISS004 Roll: E Frame: 7267 Mission ID on the Film or image: ISS004
Country or Geographic Name: CHILE
Features: SAN QUINTIN GLACIER
Center Point Latitude: -47.0 Center Point Longitude: -74.0 (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: 16
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

Date: 20020207 (YYYYMMDD)GMT Time: 150213 (HHMMSS)
Nadir Point Latitude: -46.5, Longitude: -74.9 (Negative numbers indicate south for latitude and west for longitude)
Nadir to Photo Center Direction: Southeast
Sun Azimuth: 52 (Clockwise angle in degrees from north to the sun measured at the nadir point)
Spacecraft Altitude: 212 nautical miles (393 km)
Sun Elevation Angle: 49 (Angle in degrees between the horizon and the sun, measured at the nadir point)
Orbit Number: 2384

Captions

The San Quintín Glacier is the largest outflow glacier of the Northern Patagonian Ice Field in southern Chile. Its terminus is a piedmont lobe just short of the Golfo de Penas on the Pacific Ocean and just north of 47°S. Like many glaciers worldwide during the twentieth century, San Quintín appears to be losing mass and possibly retreating. Such a change is evident in these two photographs taken by astronauts only seven years apart. The first was taken by the crew of STS-068 in October 1994 (STS068-260-73) and the second by the Increment 4 crew of the International Space Station in February 2002.

Even with the reversal of season and different lighting conditions of these two acquisitions, a loss of mass and change of structure, particularly in the lobe, are strikingly evident in these comparative photos. Glaciers are one of the special topics identified as scientific objectives for monitoring with photography from the International Space Station. Astronaut photography is a complimentary source of remote sensing data available for use with other sensor systems being used to monitor and study glaciers (see an ASTER image of the San Quintín Glacier). They also provide strong, visual context information on glacier environments and processes using a familiar medium, the camera.

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