Re: Filter Out Objects

Jerry N7YGE

Yes I copied and pasted your exact script into the filter  just as you wrote it.  No love yet for the SarTrack client.


I never saw any Sota symbols on the APRSISCE map nor a place to turn them on so inserting the script in the filter I have not been able to prove works yet.


I have to assume you have seen it work then.


Jerry N7YGE




From: [] On Behalf Of Lynn Deffenbaugh
Sent: Thursday, January 7, 2021 10:53 AM
Subject: Re: [APRSISCE] Filter Out Objects


That's -s//;/S  or minus lower-s slash slash semicolon slash capital S.  You're missing the minus, s and a slash in your quote-back.

The SOTA objects I found were not Red X, but are a SOTA symbol, an S overlay on a picnic table.  The raw packets captured below are the same.

Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32

On 1/7/2021 1:36 PM, Jerry N7YGE wrote:

The symbol is and Red X with a plus sign overlay.  X is /.   Seems like you would have to write to something using the period.   The /;/S did not work so far but will give 2 hours for the decay.


Jerry N7YGE


From: [] On Behalf Of Lynn Deffenbaugh
Sent: Thursday, January 7, 2021 9:38 AM
Subject: Re: [APRSISCE] Filter Out Objects


Actually, these are using the "SOTA" symbol instead of the X that I saw yesterday.  A filter term of:


should knock them out since the SOTA symbol is an S overlay on the ; alternate table symbol.

And these objects ARE on the APRS-IS network, it just depends where you are and whether or not any of them is within your range.  There are 44 active objects world wide with this symbol in the past 2 hours.

Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32

On 1/7/2021 12:00 PM, Mark, KE6BB via wrote:

You were almost to the raw packets when you were on  All you had to do is click on "raw" link just below your browser's address field, and copy and paste a few of the raw packets on that next screen.  Here are a few:

2021-01-07 08:08:42 PST: ON6ZQ>APN100,TCPIP*,qAC,EIGHTH:;DL/AM-001*071608z4748.05NS01100.77E;SOTA activ. planned on 20210108 1315z
2021-01-07 08:08:51 PST: ON6ZQ>APN100,TCPIP*,qAC,EIGHTH:;W7W/SO119*111111z4701.39N/12258.82W.Summits On The Air -
2021-01-07 08:10:35 PST: ON6ZQ>APN100,TCPIP*,qAC,FIFTH:;DL/AM-176*071610z4742.92NS01054.56E;SOTA activ. planned on 20210108 1030z
2021-01-07 08:10:50 PST: ON6ZQ>APN100,TCPIP*,qAC,NINTH:;W0C/FR037*071610z4017.31NS10531.04W;SOTA activ. planned on 20210107 1800z
2021-01-07 08:12:41 PST: ON6ZQ>APN100,TCPIP*,qAC,FIFTH:;HB/BE-111*111111z4655.04N/00726.63E.Summits On The Air -
2021-01-07 08:12:50 PST: ON6ZQ>APN100,TCPIP*,qAC,EIGHTH:;E7/BO-067*111111z4500.83N/01654.55E.Summits On The Air -

So Randy was correct. "-b/ON6ZQ" should block all of these, but will also block any other traffic from ON6ZQ, which may or may not be a good thing for you.  A second choice in blocking filter might be "-u/APN100" but that will block any packets with APN100 in the "to call" field, and also may or may not be what you want.  I am unfamiliar with the app being used here, so I can't tell you how to enter server side filters on it.

It appears those objects are "Summits on the Air" (SOTA) peaks being injected into the server your friends application is using.  That might explain why we do not see sota peak objects on APRSIS32.  Maybe changing the server to one that doesn't include sota peaks out might be helpful.  For example when I use firenet, I filter out the water station objects so they don't  clutter my screen.  I don't have to filter those objects out when I use one of the servers because they aren't sent on by that group of servers.  Try to see if they no longer show up. 

Be sure to clear out all of the objects after changing filters or switching servers so you can see if there is any improvement.  The objects may take several hours to time out if you don't.


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