Re: [Duplicate telemetry sequence, Delayed or out-of-order packet (sequence number)]


James Ewen
 

Let’s start with the easiest answer. 

Why is it only mobile stations that show out of order packets?

A mobile station sends a sequence of packets, perhaps with a time stamp, but for sure with unique information as the location is changing. 

A fixed station will send the same information over and over again. 

So if I start reciting “abcdefhgijk” you will notice one character out of order. If I say “aaaaaaaaaaa”, can you tell which character is out of order?

That’s why it appears only mobile stations are affected. Fixed stations with timestamps, sending telemetry, weather, or some other changing information can show up with duplicate packets that can be flagged by Hessu’s algorithm. 

Have you read the information previously provided, including the analysis performed? Have you tried some of the experiments suggested?

If you have multiple stations that are showing the issue, that makes diagnosis easier. Gather suspect packets from all of the affected stations, and look for a common suspect. 

If there are multiple stations causing the issue, it can get more complicated, but gather that information. 

Try doing that now, and post your results. I suspect that by the time you have compiled the data to post that you will find your offending station. If not, then we can show you the answer in your data. 

Again the best way to find the problem is to look at the raw data from the RF spectrum and not the heavily filtered APRS-IS stream. 


On Tue, Nov 23, 2021 at 07:11 Rick <kd4dra@...> wrote:
I would like to revisit this topic, someone out here, may be able to see what's happening is it my station or the wc4hc-15 delaying, cause I was looking around and found some stations don't have the same results with their station, it seems it is only mobile station that do have the problem. see the following paste, from mobile stations.
2021-11-23 07:41:40 EST: KO4HKX-9>S4UW7W,NC4HC-15,WIDE1,KI4WXS-5,WIDE2*,qAR,UNIONC:`n5|nT-u/]"7[}=
2021-11-23 07:42:14 EST: KO4HKX-9>S4UW2R,WIDE1-1,WIDE2-1,qAR,GSPSC:`n6B Sou/]"7K}=
2021-11-23 07:43:01 EST: KO4HKX-9>S4UW2R,GSPSC,NC4HC-15,WIDE2*,qAR,ANDMTN:`n6B Sou/]"7K}=
2021-11-23 07:44:47 EST: KO4HKX-9>S4UU5V,WIDE1-1,WIDE2-1,qAR,GSPSC:`n5<0x7f> gku/]"7B}=
2021-11-23 07:45:28 EST: KO4HKX-9>S4UU5V,GSPSC,NC4HC-15,WIDE2*,qAR,KR4NO-1:`n5<0x7f> gku/]"7B}=
2021-11-23 07:46:05 EST: KO4HKX-9>S4UT8R,WIDE1-1,WIDE2-1,qAR,GSPSC:`n5en!vu/]"7O}=

21-11-22 06:28:24 EST: KO4NNH-1>STTS2X,GSPSC,NC4HC-15,WIDE2*,qAR,ANDMTN:`n3/l{h>/`"6w}Fred in mobile_1
2021-11-22 21:03:00 EST: KO4NNH-1>STSX4R,WIDE1-1,WIDE2-1,qAR,GSPSC:`n61p4|>/`"6A}Fred in mobile_1
2021-11-22 21:06:01 EST: KO4NNH-1>STSY3T,qAR,SHOJCT:`n41pH_>/`"6s}Fred in mobile_1
2021-11-22 21:14:11 EST: KO4NNH-1>STTS7X,qAR,GSPSC:`n3;lU&>/`"7)}Fred in mobile_1
2021-11-22 21:17:12 EST: KO4NNH-1>STTS7X,WIDE1-1,qAR,GSPSC:`n3<l 7>/`"7+}Fred in mobile_1
2021-11-22 21:17:44 EST: KO4NNH-1>STTS7X,qAR,GSPSC:`n3=lK4>/`"7+}Fred in mobile_1
2021-11-22 21:18:40 EST: KO4NNH-1>STTS7X,NC4HC-15,WIDE1*,qAR,KR4NO-1:`n3<l 7>/`"7+}Fred in mobile_1 [Duplicate position packet]
2021-11-22 21:20:29 EST: KO4NNH-1>STTS1Y,WIDE1-1,WIDE2-1,qAR,GSPSC:`n2xlqi>/`"6u}Fred in mobile_1
2021-11-22 21:23:30 EST: KO4NNH-1>STTS1U,qAR,GSPSC:`n2zl!#>/`"6v}Fred in mobile_1
2021-11-22 21:28:31 EST: KO4NNH-1>STTS1U,WIDE1-1,qAR,GSPSC:`n2{l!#>/`"6w}Fred in mobile_1
2021-11-23 06:21:41 EST: KO4NNH-1>STTS1V,WIDE1-1,WIDE2-1,qAR,GSPSC:`n2zlT<0x1d>>/`"70}Fred in mobile_1
2021-11-23 06:22:47 EST: KO4NNH-1>STTS1V,GSPSC,NC4HC-15,WIDE2*,qAR,KR4NO-1:`n2zlT<0x1d>>/`"70}Fred in mobile_1

2021-11-23 08:22:48 EST: KD4KBO-2>ST4T3W,GSPSC,NC4HC-15,WIDE2*,qAR,KR4NO-1:`n+8mJVk\'|!,%N|!w0r!|3 [Duplicate telemetry sequence, Delayed or out-of-order packet (sequence number)]
2021-11-23 08:23:19 EST: KD4KBO-2>ST4T3R,WIDE1-1,WIDE2-1,qAR,KD4DRA-1:`n+HmA>k\'|!-%E|!w(N!|3
2021-11-23 08:23:29 EST: KD4KBO-2>ST4T3W,WIDE1-1,WIDE2-1,qAR,KD4DRA-1:`n+Lnhxk\'|!.%C|!wCe!|3
2021-11-23 08:23:48 EST: KD4KBO-2>ST4T3X,WIDE1-1,WIDE2-1,qAR,KD4DRA-1:`n+`o,Vk\'|!/%K|!w<%!|3
2021-11-23 08:23:53 EST: KD4KBO-2>ST4T3U,WIDE1-1,WIDE2-1,qAR,KD4DRA-1:`n+do65k\'|!0%P|!wi]!|3
2021-11-23 08:24:07 EST: KD4KBO-2>ST4T2V,WIDE1-1,WIDE2-1,qAR,KD4DRA-1:`n+qo@Wk\'|!1&9|!wlc!|3
2021-11-23 08:24:53 EST: KD4KBO-2>ST4T2V,GSPSC,NC4HC-15,WIDE2*,qAR,KR4NO-1:`n+qo@Wk\'|!1&9|!wlc!|3 [Duplicate telemetry sequence, Delayed or out-of-order packet (sequence number)]
2021-11-23 08:25:44 EST: KD4KBO-2>ST4U0T,WIDE1-1,WIDE2-1,qAR,KD4DRA-1:`n-<0x1c>q}6k\'|!3%J|!w/{!|3
2021-11-23 08:27:46 EST: KD4KBO-2>ST4V4X,WIDE1-1,WIDE2-1,qAR,GSPSC:`n.8pJyk\'|!5&<|!w!G!|3
2021-11-23 08:29:06 EST: KD4KBO-2>ST4V4X,GSPSC,NC4HC-15,WIDE2*,qAR,SHOJCT:`n.8pJyk\'|!5&<|!w!G!|3 [Duplicate telemetry sequence, Delayed or out-of-order packet (sequence number)]
2021-11-23 08:29:43 EST: KD4KBO-2>ST4V7S,WIDE1-1,WIDE2-1,qAR,GSPSC:`n.Vm}<k\'|!6%p|!w'W!|3
2021-11-23 08:30:40 EST: KD4KBO-2>ST4V7S,GSPSC,NC4HC-15,WIDE2*,qAR,KI4M-1:`n.Vm}<k\'|!6%p|!w'W!|3 [Duplicate telemetry sequence, Delayed or out-of-order packet (sequence number)]
2021-11-23 08:33:16 EST: KD4KBO-2>ST4X1W,WIDE1-1,WIDE2-1,qAR,GSPSC:`n/(n#<0x1d>k\'|!8%D|!wG;!|3
2021-11-23 08:33:55 EST: KD4KBO-2>ST4X1W,GSPSC,NC4HC-15,WIDE2*,qAR,KR4NO-1:`n/(n#<0x1d>k\'|!8%D|!wG;!|3 [Duplicate telemetry sequence, Delayed or out-of-order packet (sequence number)]
2021-11-23 08:39:43 EST: KD4KBO-2>ST4Y7V,WIDE1-1,WIDE2-1,qAR,GSPSC:`n0pnKAk\'|!:%D|!w4#!|3
2021-11-23 08:40:36 EST: KD4KBO-2>ST4Y7V,GSPSC,NC4HC-15,WIDE2*,qAR,KR4NO-1:`n0pnKAk\'|!:%D|!w4#!|3 [Duplicate telemetry sequence, Delayed or out-of-order packet (sequence number)]
2021-11-23 08:46:03 EST: KD4KBO-2>APT314,WIDE1-1,WIDE2-1,qAR,GSPSC:>MicroTrak FA v1.42
2021-11-23 08:46:05 EST: KD4KBO-2>APT314,GSPSC*,WIDE2-1,qAR,KG4BCC:MicroTrak FA v1.42 [Unsupported packet format]
2021-11-23 09:03:09 EST: KD4KBO-2>ST5P0R,WIDE1-1,WIDE2-1,qAR,GSPSC:`n0Ql*-k\'|!"%x|!wP]!|3
2021-11-23 09:03:22 EST: KD4KBO-2>ST5P0S,WIDE1-1,WIDE2-1,qAR,GSPSC:`n0Tm,Rk\'|!$%f|!ww{!|3
2021-11-23 09:03:38 EST: KD4KBO-2>ST5P0R,WIDE1-1,WIDE2-1,qAR,GSPSC:`n0VlRjk\'|!&%Y|!w:&!|3
2021-11-23 09:03:55 EST: KD4KBO-2>ST5P0S,GSPSC,NC4HC-15,WIDE2*,qAR,KR4NO-1:`n0Tm,Rk\'|!$%f|!ww{!|3 [Duplicate telemetry sequence, Delayed or out-of-order packet (sequence number)]
2021-11-23 09:04:41 EST: KD4KBO-2>ST5P0R,GSPSC,NC4HC-15,WIDE2*,qAR,KR4NO-1:`n0VlRjk\'|!&%Y|!w:&!|3 [Duplicate telemetry sequence, Delayed or out-of-order packet (sequence number)]
2021-11-23 09:05:23 EST: KD4KBO-2>APT314,WIDE1-1,WIDE2-1,qAR,GSPSC:>MicroTrak FA v1.42
2021-11-23 09:05:25 EST: KD4KBO-2>APT314,GSPSC*,WIDE2-1,qAR,KG4BCC:MicroTrak FA v1.42 [Unsupported packet format]
2021-11-23 09:06:32 EST: KD4KBO-2>APT314,GSPSC,NC4HC-15,WIDE2*,qAR,WINNSB:>MicroTrak FA v1.42
 Thanks for any help, if it is something that I can fix, I need help!

73, Rick

--
James
VE6SRV

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