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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: NY ranks #1 in Internet b/w
> Over 300 ms for less than 10000 km (6000 miles) is not great. Even a good > satellite should be able to provide better round trip times... That sounds somewhat erroneous. Geosynchronus orbit is about 22,500 miles; up+down+roundtrip makes that 22,500 * 4, or 90,000 miles; 90,000 / 186,000 miles/sec = 483 milliseconds, which, or course, due to routers inducing very measureable delay, and the fact that an IP Packet takes adds a little delay due to its lenght, is usually a bit more. When working on this stuff (specifically on a hop from Oslo to Jerusalem), I recall 630 ms being the average latency. But, to make my point, Geosync orbit could never, ever be less than 483 milliseconds, ever. -- Alex Rubenstein, AR97, K2AHR, [email protected], latency, Al Reuben -- -- Net Access Corporation, 800-NET-ME-36, http://www.nac.net --
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