Re: [aprsisce] aprs.fi
- On 10/29/2011 8:10 AM, Charles Blackburn wrote:
> I'm getting packets over RF that doesn't appear up on aprs.fi.There's been a whole chain of discussion on the aprs.fi google group
about Hessu's crediting algorithm. I'll refer you over there for
details. But suffice it to say, he's VERY conservative on what gets
credit for hearing what, and it's solely based on the post-APRS-IS dupe
filtering, so longer RF hops don't stand a chance at showing up if there
shorter links that deliver the goods.
> Specifically for example, the 2 I've just noticed w4mco-10 and kc4vlj-2. MyAPRSISCE/32 sends EVERYTHING to the upstream APRS-IS server. It's at
> question, is that even though they're gating themselves to the IS, surely
> they should appear here? Or is it that because they're gated by themselves,
> then they're considered a dupe (which is my thinking) so they won't show up
> in the list because my igate didn’t send it to the IS?
that entry point that the dupe-filtering happens. This is why you can
see different paths for a single packet depending on which APRS-IS
server you're connected to. Two APRS-IS server may hear the packet near
simultaneously and before they've heard the other so they both forward
their version further into the network. Eventually, a server back in the
center somewhere hears one before the other and that's the one that
continues the propagation through APRS-IS.
Oh, and any station that injects directly into -IS at the same time as
transmitting via RF will almost never show the RF activity as the direct
-IS nearly always gets there first.
> Ps, I like the "view rf only stations" on the new version :PThen you're REALLY going to like the new path viewing feature just
released into development. Brace yourself for a map full of lines
similar to my aging coverage maps at:
But Florida dwellers would most be interested in:
But with judicious and timed screen captures, any APRSISCE/32 user will
soon be able to produce the same sort of maps, well maybe not the (3)
Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32
PS. The CoralCDN seems to be having trouble this morning, so if those
links don't work, just chop out the ".nyud.net" and try it direct/