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To: Bradley W. Price who wrote (1195)	4/8/1999 11:19:00 AM
From: Valueman	Respond to of 5853

Orbit at 1414 Km, with anywhere from 2 to 4 sats in view at any one time. Approximately 10,000 circuits available over North America, for instance, at any one time. This is the upper limit on simultaneous users--definitely not total users. That number would be some multiple based on use patterns. These numbers account for the soft handoffs and multipath diversity that you allude to in saying the sats "fade in and out." Only for Iridium can you see, or more correctly, use, one satellite at a time. As in terrestrial CDMA, satellite CDMA ala G* will be able to use signals from multiple sats if need be.

To: Bradley W. Price who wrote (1195)	4/8/1999 2:07:00 PM
From: William	Read Replies (1) \| Respond to of 5853

You may find this interesting - 500 Sat's liftoff.msfc.nasa.gov Not all are geo, but far more than 48. Anyway, it's fun to play with.