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Photographing the Earth from the International Space Station

Astronaut Photography of Earth - Display Record

ISS015-E-5481

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File NameFile Size (bytes)WidthHeightAnnotatedCroppedPurposeComments
View ISS015-E-5481.JPG 94057639435 No No
View ISS015-E-5481.JPG 337785385540 Yes Yes NASA's Earth Observatory web site
View ISS015-E-5481.JPG 9873017131000 No Yes NASA's Earth Observatory web site
View ISS015-E-5481.JPG 142654730322064 No No

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Electronic Image Data

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Identification

Mission: ISS015 Roll: E Frame: 5481 Mission ID on the Film or image: ISS015
Country or Geographic Name: USA-MARYLAND
Features: PATUXENT R. AIR TEST CENTER
Center Point: Latitude: 38.3 Longitude: -76.4 (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: 25
Camera Focal Length: 800mm
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: 20070428 (YYYYMMDD) GMT Time: 171919 (HHMMSS)
Nadir Point Latitude: 39.6, Longitude: -76.0 (Negative numbers indicate south for latitude and west for longitude)

Nadir to Photo Center Direction: South
Sun Azimuth: 190 (Clockwise angle in degrees from north to the sun measured at the nadir point)
Spacecraft Altitude: 174 nautical miles (322 km)
Sun Elevation Angle: 64 (Angle in degrees between the horizon and the sun, measured at the nadir point)
Orbit Number: 296

Captions

Patuxent River Naval Air Station, Maryland:
Maryland’s Patuxent River Naval Air Station is located on a small peninsula, bordered by the Patuxent River to the north-northeast and Chesapeake Bay to the east and southeast. The air station was commissioned in 1943, replacing farmlands that had occupied the peninsula less than a year earlier. The primary purpose of “Pax River” (as the site is known by the U.S. Navy) was to consolidate geographically dispersed testing facilities that existed prior to World War II. The Patuxent River station is now the primary center for naval air technology research, development, testing, and support, as well as being the location of the Navy Test Pilot School.

International Space Station crews frequently use the Patuxent River Naval Air Station as a geographic reference point and photographic training target. This astronaut photograph illustrates why—the distinctive pattern of the airfield runways and the station’s location in Chesapeake Bay make it easy to spot from orbit. The sharp boundaries between different kinds of land surfaces are good for camera focusing practice.

This particular image also captures surface water current patterns around the peninsula. Wind- and wave-roughened water surfaces appear silver-gray due to increased reflectance of light back towards the camera (sunglint), whereas dark blue water patches indicate water smoothed by the presence of oils and surfactants (smooth water reflects less light back to the observer) from either natural or human sources. A zone of mixing from converging shoreline currents extends northeast into the bay from Cedar Point.

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