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[aprssig] APRS-IS filtered feed question

Keih VE7GDH ve7gdh at rac.ca
Mon Jan 29 16:14:16 UTC 2007


Ron K0QVF wrote...

> I am using UI-View and am connected to a 14580 filtered port with a
> filter of "filter t/mn m/1100".  When I look at a world map or my
> station list I see a number of stations that are outside the 1100 km
> circle.  The number varies but at this moment there are 211 outside
> the range.  What is causing this?

I've asked that myself in the past. Stations outside your range filter could 
show up for a few reasons. Someone near you could just plain be gating them 
out to RF. Someone in your area could have queried the other station. I was 
going to say that they could have sent a message to someone "local" to your 
area, but you are using the "type" filter with "m" in there meaning that the 
server you are connected to will send all messages to you. That could be 
part of it. I am also using the "type" filter to see satellites. However, 
some of them are always in the same fixed position. It's kinda cute when 
someone uses a wrong symbol like that, but using the satellite symbol 
doesn't make them a satellite. There's one station near me that uses the 
"helicopter" symbol. However, he solidly has four wheels in contact with the 
road. If you look at any of the stations outside your range filter, you 
should be able to determine why they showed up by examining their raw data. 
In my case, the "satellites" in Europe an Japan are on my map because of my 
type filter. You could look at the raw data for the stations outside your 
range filter and see if they had sent messages.

73 es cul - Keith VE7GDH
--
"I may be lost, but I know exactly where I am!"






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