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RE: Unconventional wearable usage

From: "Zeller, Eric (NLC-EX)" <>
Date: Wed, 3 Feb 1999 09:25:14 -0800

> This has been done by several hams I know... at Dayton every year we have
> a
> aircraft pilots digital recorder that records 10 minutes of audio in a
> streaming fashion.. I.E. the last 10 minutes of audio is always available
> to hear.  Works great for those  "where are you again?" but then APRS
> works
> here too. with my wearable I can see the 3 other people in my group from
> their GPS to APRS boxes I asked them to carry... Now to try it at Dayton
> this year :-)
> 
> 
	[Zeller, Eric (NLC-EX)]  

	I would think that with GPS only accurate to about 100 feet, it
would be difficult to keep track of someone in a small area like a Hamfest
	(not ever having been to Dayton, I can only imagine the size), I
mean you might be able to tell which building a person was in, but not which
table or booth. Unless you went to DGPS, but now you have one receiver for
the DGPS signal, one transceiver for APRS incoming and outgoing, one GPS
receiver, plus any voice links you might have. How many antennas can one
person wear? 

	(Steve, did you ever finish the paper on using conductive thread to
sew antennas into clothing, last I heard you were still writing it)

	I do suppose it is possible, though I haven't seen APRS so this yet,
to have the DGPS signal come in on the APRS frequency, and the APRS program
do the correction. Most implementations I've seen pipe the DGPS signal
directly to the GPS though, as the GPS knows it's own internals better and
can do a better job of correcting.

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