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Astronaut Photography of Earth - Display Record
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IdentificationMission: ISS013 Roll: E Frame: 78506 Mission ID on the Film or image: ISS013
Country or Geographic Name: MONGOLIA
Features: HAR LAKE, SPREADING DUNES
Center Point: Latitude: 48.3 Longitude: 96.1 (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: High Oblique
Camera Focal Length: 400mm
Camera: E4: Kodak DCS760C Electronic Still Camera
Film: 3060E : 3060 x 2036 pixel CCD, RGBG array.
Percentage of Cloud Cover: 10 (0-10)
GMT Date: 20060907 (YYYYMMDD) GMT Time: 083026 (HHMMSS)
Nadir Point Latitude: 51.7, Longitude: 104.3 (Negative numbers indicate south for latitude and west for longitude)
Nadir to Photo Center Direction: West
Sun Azimuth: 242 (Clockwise angle in degrees from north to the sun measured at the nadir point)
Spacecraft Altitude: 184 nautical miles (341 km)
Sun Elevation Angle: 27 (Angle in degrees between the horizon and the sun, measured at the nadir point)
Orbit Number: 612
CaptionsISS013-E-78506 (7 Sept. 2006) --- Sand dunes near Mongolia's Har Lake are featured in this image photographed by an Expedition 13 crewmember on the International Space Station. Har (or Black) Lake is located in the western part of the country within the Valley of Lakes--part of a system of closed basins that stretches across central Asia. According to scientists, these basins are the remnants of larger paleolakes that had begun to shrink in size by approximately five thousand years ago as regional climate became drier. Today, the Valley of Lakes is an important ecological resource for study of steppe grasslands, and as resting points for large numbers of migratory birds. Portions of the basin are designated as national parks or other protected areas, and Har Lake itself is an ecotourism destination (usually by horseback). This oblique view captures the dynamic nature of the landscape of Har Lake. The lake is encircled by sand dune fields which encroach on the lower slopes of the Tobhata Mountains to the west and south. Gaps in the mountains have been exploited by sand dunes moving eastward (indicating westerly winds) -- the most striking example being a series of dunes entering Har Lake along its southwestern shoreline. Here, the dune forms reflect the channeling of winds through the break in the mountain ridgeline, leading to dune crests oriented transverse to northwesterly winds. Another well-developed line of dunes is visible between Har and Baga Lakes. While these dunes appear to cut across a lake surface, the dunes have in fact moved across a narrow stream channel.
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Recommended Citation: Earth Science and Remote Sensing Unit, NASA-Johnson Space Center. "The Gateway to Astronaut Photography of Earth." .