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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: ISS038 Roll: E Frame: 57977 Mission ID on the Film or image: ISS038
Country or Geographic Name: USA-WISCONSIN
Features: WASHINGTON ISLAND, ICE
Center Point: Latitude: 45.3 Longitude: -86.7 (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: 33
Camera Focal Length: 1000mm
Camera: N4: Nikon D3X
Film: 6048E : 6048 x 4032 pixel CMOS sensor, 35.9mm x 24.0mm, total pixels: 25.72 million, Nikon FX format.
Percentage of Cloud Cover: 10 (0-10)
GMT Date: 20140222 (YYYYMMDD) GMT Time: 195259 (HHMMSS)
Nadir Point Latitude: 46.4, Longitude: -88.8 (Negative numbers indicate south for latitude and west for longitude)
Nadir to Photo Center Direction: Southeast
Sun Azimuth: 210 (Clockwise angle in degrees from north to the sun measured at the nadir point)
Spacecraft Altitude: 221 nautical miles (409 km)
Sun Elevation Angle: 29 (Angle in degrees between the horizon and the sun, measured at the nadir point)
CaptionsSnow-covered fields appear as geometric patterns on Lake Michiganís Washington Island in this photograph taken by the crew of the International Space Station. The island is 9 km long (5.6 miles) and lies on Lake Michiganís western shore, as a continuation of Wisconsinís Door Peninsula. (Note that north is to the lower left in the image.)
White coastal ice hugs the shoreline and connects Washington Island with Detroit Island and Rock Island. Ice typically accumulates first near land, where cooling is more rapid than in deeper lake water. Two other snow-covered islands (image top left) are small enough and far enough from land to evade the collars of ice.
On the day this image was taken, southwesterly winds were blowing ice into the lake in the form of long, coherent stringers. The thickness of a stringer is related to the length of coastline that feeds it. The smallest northern stringer (image left) is fed by the shortest section of upwind coastline, and the longest (image right) is supplied by the large amount of shore ice around Detroit Island. These dominant winds keep a narrow zone (along the western shore of the lake) clear of ice, even as accumulations in the winter of 2014 reach the highest levels ever recorded in Lake Michigan.
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Recommended Citation: Earth Science and Remote Sensing Unit, NASA-Johnson Space Center. "The Gateway to Astronaut Photography of Earth." .