[ADXA] Question on FT8 Identifiers/reports

[EJ Jones]

I agree.  Looks like FT8 hash.

EJ

From: adxa-bounces at mailman.qth.net [mailto:adxa-bounces at mailman.qth.net] On Behalf Of Pat Patterson
Sent: Wednesday, December 2, 2020 3:37 PM
To: sbranyan at cox.net
Cc: ADXA <adxa at mailman.qth.net>
Subject: Re: [ADXA] Question on FT8 Identifiers/reports

Scott
Looks like a random noise decode to me. While the calls may match the structure of a valid call, neither are found in a QRZ search.  With deep decoding WSJT-x is trying hard to find something valid.   A long runing stream of random noise bits will eventually yield a match of some valid structure for a decode.  It happens more frequently on 2M MSK144 with the SH option enabled.   SH is used for the Tx3, Tx4 and Tx5. It sends a shorter packet of only about 28 bits with compressed representations of calls. Report and RR73 and 73.  It doesn't take long for a string of noise bits to match a valid message structure.  Hope I've explained it clearly.

73,
Pat. W5VY

On Wed, Dec 2, 2020, 10:28 AM <sbranyan at cox.net<mailto:sbranyan at cox.net>> wrote:
Lately, I've noticed more use of different identifiers after callsigns in FT8.

Such as TU; OL9MKZ 8Q2BVK 529 4295

The TU; I took as occurring on FT8 F/H. But not sure. I was not in F/H mode.

Any help on what's going on?

Thanks.

73,

Scott/W5AAJ



______________________________________________________________
ADXA mailing list
Home: http://mailman.qth.net/mailman/listinfo/adxa<https://eur05.safelinks.protection.outlook.com/?url=http%3A%2F%2Fmailman.qth.net%2Fmailman%2Flistinfo%2Fadxa&data=04%7C01%7C%7C96388bc2f02d4d72818208d8970a8df1%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637425418865770817%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=XbIAcAiw2hulSCq%2BD1MnCbNQW81DIHeiE0lP390ufxU%3D&reserved=0>
Help: http://mailman.qth.net/mmfaq.htm<https://eur05.safelinks.protection.outlook.com/?url=http%3A%2F%2Fmailman.qth.net%2Fmmfaq.htm&data=04%7C01%7C%7C96388bc2f02d4d72818208d8970a8df1%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637425418865780818%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=OcAm1wIFLPn%2BLvKvO8M6N7qrnRS5nBR5JOC%2F7lHPjb4%3D&reserved=0>
Post: mailto:ADXA at mailman.qth.net<mailto:ADXA at mailman.qth.net>

This list hosted by: http://www.qsl.net<https://eur05.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.qsl.net%2F&data=04%7C01%7C%7C96388bc2f02d4d72818208d8970a8df1%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637425418865780818%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=NHfBoKxM%2BAamI%2B3X5o1r5iBPnN9E2xofjWnKkqFFK%2Fo%3D&reserved=0>
Please help support this email list: http://www.qsl.net/donate.html<https://eur05.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.qsl.net%2Fdonate.html&data=04%7C01%7C%7C96388bc2f02d4d72818208d8970a8df1%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637425418865790813%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=UoUbQIrU%2FgTYrhBYK1braEpp0tHpiN4BYpnG437Gmxo%3D&reserved=0>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/adxa/attachments/20201202/81f883bc/attachment-0001.html>