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The Gateway to Astronaut Photography of Earth
(NASA Crew Earth Observations)
Astronaut Photography of Earth - Display Record
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IdentificationMission: ISS002 Roll: E Frame: 5677 Mission ID on the Film or image: ISS002
Country or Geographic Name: TUAMOTU ARCHIPELAGO
Features: NUKUTAVAKE ISLAND
Center Point: Latitude: -19.5 Longitude: -139.0 (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:
CameraCamera Tilt: 14
Camera Focal Length: 800mm
Camera: E2: Kodak DCS460 Electronic Still Camera
Film: 3060E : 3060 x 2036 pixel CCD, RGBG array.
Percentage of Cloud Cover: 10 (0-10)
GMT Date: 20010418 (YYYYMMDD) GMT Time: 201800 (HHMMSS)
Nadir Point Latitude: -19.2, Longitude: -139.8 (Negative numbers indicate south for latitude and west for longitude)
Nadir to Photo Center Direction: East
Sun Azimuth: 27 (Clockwise angle in degrees from north to the sun measured at the nadir point)
Spacecraft Altitude: 205 nautical miles (380 km)
Sun Elevation Angle: 56 (Angle in degrees between the horizon and the sun, measured at the nadir point)
Orbit Number: 1782
CaptionsThis image of the Tuamotu Archipelago, French Polynesia, illustrates diversity in the morphology of atolls, one of the major types of coral reef formations. A typical atoll structure is a lagoon surrounded by a closed rim of cays and shallow spillways that control the exchange of water between the ocean and the lagoon. However, like human beings, this general scheme may vary according to the history of each individual atoll, resulting in a high diversity of morphology, especially for small atolls. On Nukutavake (138°48' W 19°17' S, 6.2 km2), what was a lagoon on is now dry and completely covered by vegetation. Images such as these are useful to classify and study the atolls according to their spatial structure.
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