Newsgroups: sci.electronics,comp.robotics,comp.robotics.misc,ci.geo.satellite-nav
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From: nagle@netcom.com (John Nagle)
Subject: Re: Need help broadcasting digital data
Message-ID: <nagleDApBDt.Gs0@netcom.com>
Organization: NETCOM On-line Communication Services (408 261-4700 guest)
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Date: Sat, 24 Jun 1995 23:46:41 GMT
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tjochem@RI.CMU.EDU (Todd Jochem) writes:
>I'm looking for a mechanism to broadcast differential corrections over about a
>3 mile area from the base station to many (2-5) different GPS units. We are 
>already using cell modems to do this sort of thing to a single GPS. The problem is that we want to distribute the same info to multiple users, and using many 
>cell phones seems kind of gangly. (Also, the area we want to distribute the datain has poor cell coverage.) I was thinking that something like a radio modem 
>with broadcast ability would so the trick. Does such a thing exist, and if so, 
>who makes it? ANy other suggestions? Thanks,

     Trimble makes a portable psuedolite; I've seen them testing it
near the Palo Alto airport.

					John Nagle
