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On 4/26/2012 4:10 PM, Ron Stordahl, AE5E wrote:
<blockquote
cite="mid:1335471002.23785.YahooMailNeo@web125701.mail.ne1.yahoo.com"
type="cite">
<div style="color:#000; background-color:#fff; font-family:times
new roman, new york, times, serif;font-size:12pt"><span
class="raw_line">As such it does have to be sent frequently,
perhaps every 10 minutes, but the path should be such that it
does not end up on the APRS-IS network nor digipeated far far
away. You can keep it off of APRS-IS by terminating the path
with the string ',NOGATE'. IGates which are working correctly
will not send such a packet to the internet. The path itself
should be short, perhaps only NOGATE so that no area
digipeater will repeat it. </span><br>
</div>
</blockquote>
<br>
Why keep such objects off the APRS-IS? If I'm planning a trip into
an area, I'd like to be able to scope it out in advance and see what
the radio infrastructure might be there via aprs.fi (or your
favorite APRS Internet site).<br>
<br>
Alternatively, if I'm using a contemporary APRS-IS client to see the
surrounding infrastructure and have a voice-only radio, why hide the
repeater objects from my visibilty?<br>
<br>
You're actually adding path length for NOGATE and could shorten the
packet by 7 over-the-air bytes if you just let the APRS/APRS-IS work
as designed instead of trying to keep packets "private" for some
reason.<br>
<br>
Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32<br>
<br>
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