Talk:Global Navigation Satellite System

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 Definition A system which allows small electronic devices to determine their location (Longitude, Latitude, and Altitude) as well as time with an accuracy of up to a few centimetres using time signals transmitted along a line of sight by radio from satellites. [d] [e]
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 Workgroup categories Engineering and Military [Categories OK]
 Subgroup category:  Marine electronics
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I've created a redirect from Global Positioning System to here, after seeing a note about the GPS article being moved here. If this is inappropriate, feel free to undo it, and let me know. Thanks, Anthony Argyriou 19:41, 28 February 2007 (CST)

What are "L1 and L2"?

The section on GPS says that its satellites "broadcast on L1 and L2," without any further explanation. Are those frequencies, frequency bands, encoding techniques, characters in "The Cat in the Hat" who live in a box, or what? Bruce M.Tindall 22:10, 21 August 2008 (CDT)