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:Well, looking at the [[geosynchronous]] article here on Wikipedia gives the distance to a GEO satellite (approx. 36000 km), and the [[speed of light]] is 300000 km/s. The round-trip distance is twice the altitude, or 72000 km, and 72000 / 300000 = 0.24 s (or 240 msec), a significant delay in many types of communication. [[User:Europrobe|europrobe]] 10:38, 14 January 2006 (UTC)
::I believe the reference is to deep-space satellie communications; the latency introduced in that case is on the order of minutes to hours. 15 April 2007
== The Shannon Limit ==
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