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  Image: Geographic Location Direction Photo #: ISS020-E-29216 Date: Aug. 2009
Geographic Region: CANADA-BC

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  Heiltskuk Icefield, British Columbia, Canada

The Heiltskuk (also written Ha-Iltzuk) Icefield covers an area of approximately 3,600 square kilometers (1,389 square miles) in the southern Coast Mountains of British Columbia. This detailed astronaut photograph illustrates the icefield--mostly covered by snow across the upper mountain slopes--and two major valley glaciers that extend from it. Valley glaciers are large masses of slowly flowing ice and entrained debris that move downhill, carving out wide U-shaped valleys in the process. The locations of former valley glaciers can frequently be identified by the presence of these U-shaped valleys on a now glacier-free landscape.

The two largest valley glaciers in the image, Silverthrone Glacier and Klinaklini Glacier, both flow towards Knight Inlet to the south (not shown). Several moraines--accumulations of rock and soil debris along the edges and surface of a glacier--are drawn out into long, dark lines by the flowing ice, and they extend along the length of both glaciers. The confluence of the two glaciers at image center illustrates how a moraine located along the side of a glacier can become a medial moraine, in the center of the joined ice mass. Smaller valley glaciers are visible near Mount Silverthrone.
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Images: All Available Images Low-Resolution 228k
Mission: ISS020  
Roll - Frame: E - 29216
Geographical Name: CANADA-BC  
Center Lat x Lon: 51.5N x 125.9W
Film Exposure:   N=Normal exposure, U=Under exposed, O=Over exposed, F=out of Focus
Percentage of Cloud Cover-CLDP: 10
Camera: N3
Camera Tilt: 32   LO=Low Oblique, HO=High Oblique, NV=Near Vertical
Camera Focal Length: 400  
Nadir to Photo Center Direction: N   The direction from the nadir to the center point, N=North, S=South, E=East, W=West
Stereo?:   Y=Yes there is an adjacent picture of the same area, N=No there isn't
Orbit Number: 1394  
Date: 20090806   YYYYMMDD
Time: 215752   GMT HHMMSS
Nadir Lat: 49.7N  
Latitude of suborbital point of spacecraft
Nadir Lon: 126.7W  
Longitude of suborbital point of spacecraft
Sun Azimuth: 215   Clockwise angle in degrees from north to the sun measured at the nadir point
Space Craft Altitude: 187   nautical miles
Sun Elevation: 53   Angle in degrees between the horizon and the sun, measured at the nadir point
Water Views: ICE  
Atmosphere Views:  
Man Made Views:  
City Views:  
Photo is not associated with any sequences

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