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File NameFile Size (bytes)WidthHeightAnnotatedCroppedPurposeComments
View ISS020-E-45018.JPG 65098640438 No No
View ISS020-E-45018.JPG 204013540358 Yes Yes NASA's Earth Observatory web site
View ISS020-E-45018.JPG 5630071000663 No Yes NASA's Earth Observatory web site
View ISS020-E-45018.JPG 81094942562913 No No

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Mission: ISS020 Roll: E Frame: 45018 Mission ID on the Film or image: ISS020
Country or Geographic Name: EGYPT
Center Point: Latitude: 30.4 Longitude: 32.4 (Negative numbers indicate south for latitude and west for longitude)

Stereo: (Yes indicates there is an adjacent picture of the same area)


Camera Tilt: 18
Camera Focal Length: 800mm
Camera: N3: Nikon D3
Film: 4256E : 4256 x 2832 pixel CMOS sensor, 36.0mm x 23.9mm, total pixels: 12.87 million, Nikon FX format.


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


GMT Date: 20091002 (YYYYMMDD) GMT Time: 064955 (HHMMSS)
Nadir Point Latitude: 31.1, Longitude: 31.7 (Negative numbers indicate south for latitude and west for longitude)

Nadir to Photo Center Direction: Southeast
Sun Azimuth: 122 (Clockwise angle in degrees from north to the sun measured at the nadir point)
Spacecraft Altitude: 186 nautical miles (344 km)
Sun Elevation Angle: 36 (Angle in degrees between the horizon and the sun, measured at the nadir point)
Orbit Number: 2282


Great Bitter Lake, Egypt

The Great Bitter Lake is one of several lakes located along the Suez Canal, which connects the eastern Mediterranean and Red Seas. As the canal is built only to allow ships to travel in a single lane, the Great Bitter Lake is a location where ships can change their position in line (like the passing lane on the highway) before proceeding to either Port Said to the north, or the port of Suez to the south. The lake also provides an intermediate harbor for ships traversing the Canal—a journey that typically takes 14 hours end to end. Several ships, some under power and some anchored, are visible at image right.

Prior to the opening of the Suez Canal in 1869, Great Bitter Lake was a large salt flat; in the arid climate, basins rarely accumulate enough water to become true lakes. Large expanses of white and tan sandy sediments at image left and top attest to the desert conditions surrounding the lake. Located at the approximate midpoint of the Suez Canal, Great Bitter Lake is now filled with water derived from both the Red and Mediterranean Seas, and this steady influx of water balances the water lost to evaporation. The town of Fayid (also spelled as Fayed), visible along the western shore of the lake (bottom) is a tourist destination for residents of Cairo, particularly in the summer months.

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