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No..... it's like a passive repeater. You take an active (ie
preamp'ed) antenna on the roof and plug a passive antenna into it.
Bias the whole thing with 5v to run the preamp on the external
antenna. The passive antenna becomes a radiating antenna. All the GPS
signals become "mirrored" inside the building. The only problem I can
see is getting the coax thru the roof. Think of it is cutting a hole
in the roof so that your portable GPS unit inside the building could
see the sky.<br>
<br>
I liked the vicinity tracking, but as far as I know, it's only use was
at dayton back in 1998 using those mfj data radios that were mod'ded to
be really really deaf.<br>
<br>
Wes<br>
<br>
Robert Bruninga wrote:
<blockquote cite="mids2919abe.078@FSGWHUB.usna.edu" type="cite">
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<pre wrap="">Also, has anyone in dayton ever considered a
GPS repeater in each hall?
</pre>
</blockquote>
<pre wrap=""><!---->
But then everyone gets the same position, the
position of the antenna on the roof.
My proposal for indoor tracking at Dayton is in
"vicinity tracking" where we put nearly deaf low-power
digis in each room. With no change on the part of
the trackers, once indoors, they start getting reported
via the room digis and since we have full path
tracing, then the individual is located in the room
of the first digi that heard him.
This was my plan back in 1998 or so. Its all
written up in my vicinity.txt file. These digis are
called BOX-N digis and whever APRSdos sees
a packet that comes in via a "box-N digi" it
ignores the actual posit and plots it as a vicinity
plot in the vicniity (100 feet) of the box-N digi.
de WB4APR, Bob
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