Earth from Space - Image Information

LOCATION Direction Photo #: ISS018-E-5660 Date: Oct. 2008
Geographic Region: USA-COLORADO

Great Divide, Rocky Mountains, Colorado

This astronaut photograph highlights a portion of the Great Divide in the Rocky Mountains approximately 31 kilometers due west of Boulder, Colorado. The Great Divide is one of four continental divides recognized by geographers and hydrologists in North America--the others being the Northern, Eastern, and Saint Lawrence Seaway Divides--but it is still generally (and erroneously) known as the Continental Divide. The Great Divide is a hydrologic boundary defined by the ultimate destination of precipitation; rainfall on the western side of the Divide flows to the Pacific Ocean, while rainfall on the eastern side flows to the Gulf of Mexico. It is easy to visualize such a boundary traced along the high ridges of the Rocky Mountains (dashed line), but in regions of less obvious topography, more detailed study of the local geomorphology and hydrology are required to map the location of the Divide.

This portion of the Rocky Mountains also hosts the Niwot Ridge Long Term Ecological Research (LTER) Site. Part of the National Science Foundation's LTER program, the Niwot Ridge site is used for studies of climate interactions with tundra and alpine ecosystems. Niwot Ridge is visible in this image as a large eastward spur off the central spine of the mountains (center right). The entire Niwot LTER site is located at elevations higher than 3000 meters, and it includes an active cirque glacier and glacial landforms, tarns (glacial lakes), and permafrost.

Lake Granby, located to the west of the Great Divide, is a reservoir on the Colorado River. It is the second-largest manmade body of water in the state of Colorado. Storage of water began in 1949. Today, the lake is popular location for fishing, boating, and camping.

Images: All Available Images Low-Resolution 267k
Mission: ISS018  
Roll - Frame: E - 5660
Geographical Name: USA-COLORADO  
Center Lat x Lon: 40.0N x 105.7W
Film Exposure:   N=Normal exposure, U=Under exposed, O=Over exposed, F=out of Focus
Percentage of Cloud Cover-CLDP: 10
Camera:: N2
Camera Tilt: 18   LO=Low Oblique, HO=High Oblique, NV=Near Vertical
Camera Focal Length: 180  
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: 954  
Date: 20081028   YYYYMMDD
Time: 172040   GMT HHMMSS
Nadir Lat: 39.0N  
Latitude of suborbital point of spacecraft
Nadir Lon: 105.4W  
Longitude of suborbital point of spacecraft
Sun Azimuth: 155   Clockwise angle in degrees from north to the sun measured at the nadir point
Space Craft Altitude: 188   nautical miles
Sun Elevation: 34   Angle in degrees between the horizon and the sun, measured at the nadir point
Land Views:  
Water Views: LAKE, RESERVOIR  
Atmosphere Views:  
Man Made Views:  
City Views:  

Photo is not associated with any sequences

Home Page
Home Page
JSC Digital
Image Collection
Earth Science &
Remote Sensing

NASA meatball logo
This service is provided by the International Space Station program and the JSC Earth Science & Remote Sensing Unit, ARES Division, Exploration Integration Science Directorate.
ESRS logo