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Topic: Reference ground

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	Global Positioning System - Wikipedia, the free encyclopedia
		This system uses a series of ground reference stations to calculate GPS correction messages, which are uploaded to a series of additional satellites in geosynchronous orbit for transmission to GPS receivers, including information on ionospheric delays and individual satellite clock drift.
		Because of their constant movement with respect to the Earth's reference frame, the clocks on the satellites are affected by both special and general relativity.
		From the Earth's reference frame, satellite clocks are perceived as running at a slightly faster rate than clocks on the Earth's surface.
	en.wikipedia.org /wiki/GPS (6690 words)

	'ground' @ encyclopaediaOnline: the FREE online encyclopaedia (encyclopedia), dictionary, and grammar reference site (Site not responding. Last check: 2007-10-26)
		Grounds are usually put up first and the plastering floated flush with them.
		Sediment at the bottom of liquors or liquids; dregs; lees; feces; as, coffee grounds.
		One of the chief pieces of framing of a building; a timber laid horizontally on or near the ground to support the uprights; a ground sill or groundsel.
	www.encyclopaediaonline.com /article.asp?topic=ground (1391 words)

	Encyclopedia :: encyclopedia : Cartography (Site not responding. Last check: 2007-10-26)
		General maps exhibit many reference and location systems and often are produced in a series.
		For example the 1:24,000 scale topographic maps of the United States Geological Survey (USGS) are a standard as compared to the 1:50,000 scale Canadian maps.
		A listing of over 5000 websites describing holdings of manuscripts, archives, rare books, historical photographs, and other primary sources for the research scholar
	www.hallencyclopedia.com /Cartography (1579 words)

	Berkshire Blog: a global point of reference: From the ground up
		Berkshire Blog: a global point of reference: From the ground up
		« Googling and the reference road ahead
		There were lots of other things that helped me get through our first ALA, and my first trade show (David was the experienced hand, having done anthropology exhibits during his e-publishing days at HRAF).
	www.berkshirepublishing.com /blog/archives/2005/01/from_the_ground_1.html (223 words)

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