http://gcmd.gsfc.nasa.gov/
A comprehensive directory of information about Earth science data, including broad coverage of the oceans, atmosphere, hydrosphere, solid earth, biosphere and human dimensions of global change.
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NovAtel designs, markets and sells high-precision GPS and other positioning components and sub-systems used in a wide variety of commercial applications principally in the aviation, geomatics (surveying and mapping), mining, precision agriculture, and marine and defence industries.
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