File:Blue_Marble_2002.png
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DeskrivadurBlue Marble 2002.png |
العربية: صور ساتليَّة مُجمَّعة لتُظهر سطح الأرض كاملًا.
English: This spectacular “blue marble” image is the most detailed true-color image of the entire Earth to date. Using a collection of satellite-based observations, scientists and visualizers stitched together months of observations of the land surface, oceans, sea ice, and clouds into a seamless, true-color mosaic of every square kilometer (.386 square mile) of our planet. These images are freely available to educators, scientists, museums, and the public.
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. |
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Mammenn | NASA Visible Earth: Blue Marble: Land Surface, Shallow Water, and Shaded Topography |
Aozer | NASA’s Terra satellite for the MODIS imageries, combined by Meow. Credit: 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). |
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Public domainPublic domainfalsefalse |
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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Items portrayed in this file
diskouez a ra
11 C'hwe 2002
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image/png
checksum saozneg
3db4ee4ab241d9afd554c54b1b657675a8643017
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Istor ar restr
Klikañ war un deiziad/eur da welet ar restr evel ma oa da neuze.
Deiziad/Eur | Munud | Mentoù | Implijer | Notenn | |
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red | 23 Gou 2023 da 10:34 | 43 200 × 21 600 (529,58 Mio) | Gioppolognomo | Reverted to version as of 11:53, 5 August 2016 (UTC) | |
23 Gou 2023 da 10:28 | 5 400 × 2 700 (41,8 Mio) | Gioppolognomo | |||
5 Eos 2016 da 11:53 | 43 200 × 21 600 (529,58 Mio) | Meow | c:User:Rillke/bigChunkedUpload.js: |
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