Image:Earth Western Hemisphere.jpg

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http://earthobservatory.nasa.gov/Newsroom/BlueMarble/Images/globe_west_2048.jpg

Much of the information contained in this image came from a single remote-sensing device-NASA’s Moderate Resolution Imaging Spectroradiometer, or  MODIS. Flying over 700 km above the Earth onboard the Terra satellite, MODIS provides an  integrated tool for observing a variety of terrestrial, oceanic, and  atmospheric features of the Earth. The land and  coastal ocean portions of these images are  based on surface observations collected from June through September 2001 and  combined, or  composited, every eight days to compensate for clouds that might block the sensor’s view of the surface on any single day. Two different types of ocean data were used in these images: shallow water true color data, and  global ocean color (or chlorophyll) data. Topographic shading is  based on the GTOPO 30 elevation dataset compiled by the U.S. Geological Survey’s EROS Data Center. MODIS observations of polar sea ice were combined with observations of Antarctica made by the National Oceanic and  Atmospheric Administration’s AVHRR sensor—the Advanced Very High Resolution Radiometer. The cloud image is  a composite of two days of imagery collected in visible light wavelengths and  a third day of thermal infra-red imagery over the poles. Global city lights, derived from 9 months of observations from the Defense Meteorological Satellite Program, are  superimposed on a darkened land surface map.

Source files and  technical details (ftp)

   * Credits: NASA Goddard Space Flight Center
   * Image by Reto Stöckli (land surface, shallow water, clouds). Enhancements by Robert Simmon (ocean color, compositing, 3D globes, animation).
   * Data and 
technical support: MODIS Land Group; MODIS Science Data Support Team; MODIS Atmosphere Group; MODIS Ocean Group
   * Additional data: USGS EROS Data Center (topography); USGS Terrestrial Remote Sensing Flagstaff Field Center (Antarctica); Defense Meteorological Satellite Program (city lights).

[edit] See also

The following pages on the English Wikipedia link to this file (pages on other projects are  not listed):

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STATIC WIKIPEDIA JUNE 2008 on wikipedia2006.classicistranieri.com

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STATIC WIKIPEDIA APRIL 2007 on wikipeda2006classicistranieri.com
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