File:Earth Western Hemisphere 2002.png

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Original file ‎(2,048 × 2,048 pixels, file size: 4.47 MB, MIME type: image/png)

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Summary[edit]

Description
English: “Blue Marble”. Original caption:
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.
Date
Source https://visibleearth.nasa.gov/view.php?id=57723 (converted from the TIFF image)
Author
  • Reto Stöckli (land surface, shallow water, clouds)
  • Robert Simmon (enhancements: 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).
Other versions
  • Eastern Hemisphere in PNG format
    Eastern Hemisphere in PNG format
  • Eastern Hemisphere in JPEG format
    Eastern Hemisphere in JPEG format
  • Western Hemisphere in JPEG format
    Western Hemisphere in JPEG format
  • Eastern Hemisphere in TIFF format
    Eastern Hemisphere in TIFF format
  • Western Hemisphere in TIFF format
    Western Hemisphere in TIFF format
  • Hemispheres side by side
    Hemispheres side by side

Licensing[edit]

Public domain This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
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Date/TimeThumbnailDimensionsUserComment
current23:05, 16 April 2018Thumbnail for version as of 23:05, 16 April 20182,048 × 2,048 (4.47 MB)Alexis Jazz (talk | contribs)User created page with UploadWizard

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