Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by klubnl.pl (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id v96GOtRE011752 for ; Fri, 6 Oct 2017 18:24:58 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1e0VK2-00028S-T4 for rs_out_1@blacksheep.org; Fri, 06 Oct 2017 17:17:58 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1e0VK1-00028J-Jd for rsgb_lf_group@blacksheep.org; Fri, 06 Oct 2017 17:17:57 +0100 Received: from omr-a018e.mx.aol.com ([204.29.186.64]) by relay1.thorcom.net with esmtps (TLSv1:DHE-RSA-AES256-SHA:256) (Exim 4.89) (envelope-from ) id 1e0VJt-00088Y-DC for rsgb_lf_group@blacksheep.org; Fri, 06 Oct 2017 17:17:56 +0100 Received: from mtaomg-aah02.mx.aol.com (mtaomg-aah02.mx.aol.com [172.27.1.144]) by omr-a018e.mx.aol.com (Outbound Mail Relay) with ESMTP id 742CA38001AC for ; Fri, 6 Oct 2017 12:17:46 -0400 (EDT) Received: from core-acx13f.mail.aol.com (core-acx13.mail.aol.com [10.76.18.2]) by mtaomg-aah02.mx.aol.com (OMAG/Core Interface) with ESMTP id 669A538000086 for ; Fri, 6 Oct 2017 12:17:45 -0400 (EDT) Received: from 188.192.44.165 by webjas-vad038.srv.aolmail.net (10.96.35.41) with HTTP (WebMailUI); Fri, 06 Oct 2017 12:17:43 -0400 Date: Fri, 6 Oct 2017 12:17:45 -0400 From: Markus Vester To: rsgb_lf_group@blacksheep.org Message-Id: <15ef27a7028-c0e-830e@webjas-vad038.srv.aolmail.net> In-Reply-To: <59D760D2.9010700@posteo.de> MIME-Version: 1.0 X-MB-Message-Source: WebUI X-MB-Message-Type: User X-Mailer: JAS STD X-Originating-IP: [188.192.44.165] x-aol-global-disposition: G X-AOL-VSS-INFO: 5800.7501/121829 X-AOL-VSS-CODE: clean DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mx.aol.com; s=20150623; t=1507306666; bh=GsTzmkEFfHnMpw3vG8NNNwkY+MHc6I0+krojbLCwqs8=; h=From:To:Subject:Message-Id:Date:MIME-Version:Content-Type; b=nGMazS3v8WUqV1Ub4oShro/Ab4atz43siM8J4W9vvVnDdhKkg6h2B4M0LpeRKEdmQ /lME/8+rTm8Ui+1HwSERy1JKXSD8zF+MrWN3/W/r8bSTOFu8hwrko4ih3XakbiXZdE +W/pxigkwumqOaUH26bjKsFG3+Gqc9z9EDXy0Tq8= x-aol-sid: 3039ac1b019059d7aca90a6a X-Spam-Score: 0.0 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Hi Stefan, thank you for the daytime message. Excellent decodes from both DL0AO antennas but nil here in Nuernberg. This is more like what I had expected. Best "73", Markus [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (markusvester[at]aol.com) -0.0 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain 0.0 HTML_MESSAGE BODY: HTML included in message 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: 3cadac9249ff6c4f823a9f49e1952c65 Subject: Re: VLF: 300 mA on 6470 Hz - 1 char decoded at DF6NM Content-Type: multipart/mixed; boundary="----=_Part_41919_2125484937.1507306663976" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=HTML_MESSAGE autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false ------=_Part_41919_2125484937.1507306663976 Content-Type: multipart/alternative; boundary="----=_Part_41918_422738268.1507306663976" ------=_Part_41918_422738268.1507306663976 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Hi Stefan, thank you for the daytime message. Excellent decodes from both DL0AO antenn= as but nil here in Nuernberg. This is more like what I had expected. Best "73", Markus -----Urspr=C3=BCngliche Mitteilung-----=20 Von: DK7FC An: rsgb_lf_group Verschickt: Fr, 6. Okt 2017 12:55 Betreff: Re: VLF: 300 mA on 6470 Hz - 1 char decoded at DF6NM Hello Markus,=20 I saw that the night time SNR was much worse than day time SNR. But i woul= d expect that it should work anyway with just 1 character. Maybe there is a= n error somewhere in the recording or so? Or maybe the phase is doing stran= ge things during the night! I can send you a 2 character message this afternoon. But 16 UTC the next 1= 6 character message starts. So let's try f =3D 6470.005000 Hz Start time: 06.October.2017 11:00:00 UTC Symbol period: 20 s Characters: 2 CRC bits: 8 Coding 16K21A Duration: 3h33min20sec Antenna current: 300 mA 73, Stefan Am 06.10.2017 12:00, schrieb Markus Vester:=20 Despite truncated data from a 31 uHz instance and severe railroad QRM, I ha= ppened to get a correct constant-phase decode from my home antenna. Best 73, Markus -----Urspr=C3=BCngliche Mitteilung-----=20 Von: Markus Vester An: rsgb_lf_group Verschickt: Fr, 6. Okt 2017 11:00 Betreff: Re: VLF: 300 mA on 6470 Hz - 1 char not decoded at DL0AO Unfortunately the 1-character message was not decoded correctly from DL0AO = data. The prior carrier had been well visible during the day, but completel= y drowned in nighttime QRN. Would you perhaps like to try another short EbN= aut message in daylight? Best 73, Markus -----Urspr=C3=BCngliche Mitteilung-----=20 Von: DK7FC An: rsgb_lf_group Verschickt: Mi, 4. Okt 2017 11:52 Betreff: Re: VLF: 300 mA on 6470 Hz Hi Paul,=20 Am 04.10.2017 11:07, schrieb Paul Nicholson:=20 You may as well use 8K19A or even 4K15A.=20 If you look at the big table at the end of=20 http://abelian.org/ebnaut/ops.shtml=20 you can see there's no further improvement in success=20 rate for 6 bit payloads (1 char plus zero CRC =3D 6 bits).=20 The reason appears to be the payload is simply not long=20 enough to make full use of the longer constraint lengths.=20 OK, so i'm changing to: f =3D 6470.005000 Hz Start time: 04.October.2017 17:00:00 UTC Symbol period: 240 s Characters: 1 CRC bits: 0 Coding 8K19A Duration: 12h48min Antenna current: 300 mA For some reason, the signal last night was about 6dB weaker.=20 Interesting. And for some reason, the signal was much stronger last night a= t SQ5BPF. Did you see it? What could be the reason? Just the noise blanker = / background QRN? The message will give you/us and 3rd impression about SNR and phase. A 10 = deg phase variation between last night and the night before seems already t= o be quite high, relative to what we observed at 8270. Maybe we will learn = a bit about propagation by that. The 1 char message is for Jacek mainly. The chance for a decode will be hi= gh i think. Then i thought i try another (daily) 12 char message for Jacek = before we can try the 100 char message. We've already done quite much on th= at 46 km band, so i wouldn't spend to much time there, 2 weeks maybe. Then = QSY to 58 km where we can stretch the record list a bit by transferring 100= chars to you Paul. 73, Stefan ------=_Part_41918_422738268.1507306663976 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
Hi Stefan,
thank you for the daytim= e message. Excellent decodes from both DL0AO antennas but nil here in Nuern= berg. This is more like what I had expected.

Best "73"= ,
Markus


-----Urspr=C3=BCngliche Mitteilung-----
Von: DK7= FC <selberdenken@posteo.de>
An: rsgb_lf_group <rsgb_lf_group@bl= acksheep.org>
Verschickt: Fr, 6. Okt 2017 12:55
Betreff: Re: VLF: = 300 mA on 6470 Hz - 1 char decoded at DF6NM

Hello Markus,

I saw that the night time SNR was much worse than day time SNR. But i would expect that it should work anyway with just 1 character. Maybe there is an error somewhere in the recording or so? Or maybe the phase is doing strange things during the night!

I can send you a 2 character message this afternoon. But 16 UTC the next 16 character message starts. So let's try
f =3D 6470.005000 Hz
Start time: 06.October.2017  11:00:00 UTC
Symbol period: 20 s
Characters: 2
CRC bits: 8
Coding 16K21A
Duration: 3h33min20sec
Antenna current: 300 mA

73, Stefan

Am 06.10.2017 12:00, schrieb Markus Vester:
Despite truncated data from a 31 uHz instance and severe railroad QRM, I happened to get a correct constant-phase decode from my home antenna.

Best 73,
Markus


-----Urspr=C3=BCngliche Mitteilung-----
Von: Markus Vester <m= arkusvester@aol.com>
An: rsgb_lf_group
Unfortunately the 1-character message was not decoded correctly from DL0AO data. The prior carrier had been well visible during the day, but completely drowned in nighttime QRN. Would you perhaps like to try another short EbNaut message in daylight?
Best 73,
Markus



-----Urspr=C3=BCngliche Mitteilung-----
Von: DK7FC <selberdenken@posteo.de>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org&g= t;
Verschickt: Mi, 4. Okt 2017 11:52
Betreff: Re: VLF: 300 mA on 6470 Hz

Hi Paul,

Am 04.10.2017 11:07, schrieb Paul Nicholson:
You may as well use 8K19A or even 4K15A.

If you look at the big table at the end of

 http://abelian.org/ebnaut/ops.shtml

you can see there's no further improvement in success
rate for 6 bit payloads (1 char plus zero CRC =3D 6 bits).

The reason appears to be the payload is simply not long
enough to make full use of the longer constraint lengths.

OK, so i'm changing to:

f =3D 6470.005000 Hz
Start time: 04.October.2017  17:00:00 UTC
Symbol period: 240 s
Characters: 1
CRC bits: 0
Coding 8K19A
Duration: 12h48min
Antenna current: 300 mA


For some reason, the signal last night was about 6dB weaker.
Interesting. And for some reason, the signal was much stronger last night at SQ5BPF. Did you see it? What could be the reason? Just the noise blanker / background QRN?
The message will give you/us and 3rd impression about SNR and phase. A 10 deg phase variation between last night and the night before seems already to be quite high, relative to what we observed at 8270. Maybe we will learn a bit about propagation by that.
The 1 char message is for Jacek mainly. The chance for a decode will be high i think. Then i thought i try another (daily) 12 char message for Jacek before we can try the 100 char message. We've already done quite much on that 46 km band, so i wouldn't spend to much time there, 2 weeks maybe. Then QSY to 58 km where we can stretch the record list a bit by transferring 100 chars to you Paul.

73, Stefan


------=_Part_41918_422738268.1507306663976-- ------=_Part_41919_2125484937.1507306663976 Content-Type: text/plain; charset=us-ascii; name=dl0ao_EW10061109-log.txt Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename=dl0ao_EW10061109-log.txt ebnaut-rx V0.7a input file EW10061109.wav sample rate 0.514392 per second rx frequency 6470 file start time 2017-10-06 06:43:44.610 polynomial 16K21A crc size 8 number of chars 2 block size 20 symbol period 20.000 number of symbols 640 list length 2000 start offset 15383.400 freq offset 0.005000 cores 2 skipped 15383.197730 seconds to start initial reference phase -39.0 --------------------------------------------- found 8R list rank 39 reference phase 0 0 0 0 carrier S/N 10.98 dB in 78.1 uHz, -30.09 dB in 1Hz, -64.07 dB in 2.5kHz carrier Es/N0 -17.08 dB carrier Eb/N0 0.41 dB info bit period 1122.81 seconds symbol error rate 282/640 = 44.063 % Es/N0 from symbol errors -19.5 dB Eb/N0 from symbol errors -2.0 dB Shannon capacity 5.0 bits/hour Shannon efficiency 63.6 % symbols file EW10061109-symbols.csv elapsed 3 seconds --------------------------------------------- found 73 list rank 0 reference phase 180 180 180 180 carrier S/N 18.85 dB in 78.1 uHz, -22.22 dB in 1Hz, -56.20 dB in 2.5kHz carrier Es/N0 -9.21 dB carrier Eb/N0 8.28 dB info bit period 1122.81 seconds symbol error rate 218/640 = 34.063 % Es/N0 from symbol errors -10.7 dB Eb/N0 from symbol errors 6.8 dB Shannon capacity 29.4 bits/hour Shannon efficiency 10.9 % symbols file EW10061109-symbols.csv elapsed 5 seconds --------------------------------------------- found 73 list rank 0 reference phase 150 150 180 180 carrier S/N 18.79 dB in 78.1 uHz, -22.29 dB in 1Hz, -56.26 dB in 2.5kHz carrier Es/N0 -9.28 dB carrier Eb/N0 8.22 dB info bit period 1122.81 seconds symbol error rate 213/640 = 33.281 % Es/N0 from symbol errors -10.2 dB Eb/N0 from symbol errors 7.3 dB Shannon capacity 29.0 bits/hour Shannon efficiency 11.1 % symbols file EW10061109-symbols.csv elapsed 66 seconds ------=_Part_41919_2125484937.1507306663976 Content-Type: text/plain; charset=us-ascii; name=dl0ao_W10061113-log.txt Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename=dl0ao_W10061113-log.txt ebnaut-rx V0.7a input file W10061113.wav sample rate 0.514392 per second rx frequency 6470 file start time 2017-10-06 06:47:50.610 polynomial 16K21A crc size 8 number of chars 2 block size 20 symbol period 20.000 number of symbols 640 list length 2000 start offset 15137.400 freq offset 0.005000 cores 2 skipped 15138.248543 seconds to start initial reference phase -59.5 --------------------------------------------- found 1; list rank 288 reference phase 0 0 0 0 carrier S/N 11.21 dB in 78.1 uHz, -29.86 dB in 1Hz, -63.84 dB in 2.5kHz carrier Es/N0 -16.85 dB carrier Eb/N0 0.64 dB info bit period 1122.81 seconds symbol error rate 282/640 = 44.063 % Es/N0 from symbol errors -19.5 dB Eb/N0 from symbol errors -2.0 dB Shannon capacity 5.3 bits/hour Shannon efficiency 60.5 % symbols file W10061113-symbols.csv elapsed 3 seconds --------------------------------------------- found 73 list rank 0 reference phase 180 180 180 180 carrier S/N 17.14 dB in 78.1 uHz, -23.93 dB in 1Hz, -57.91 dB in 2.5kHz carrier Es/N0 -10.92 dB carrier Eb/N0 6.57 dB info bit period 1122.81 seconds symbol error rate 234/640 = 36.563 % Es/N0 from symbol errors -12.2 dB Eb/N0 from symbol errors 5.3 dB Shannon capacity 20.2 bits/hour Shannon efficiency 15.9 % symbols file W10061113-symbols.csv elapsed 5 seconds ------=_Part_41919_2125484937.1507306663976 Content-Type: text/plain; charset=us-ascii; name=df6nm_10061046-log_false.txt Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename=df6nm_10061046-log_false.txt ebnaut-rx V0.7a input file 10061046.wav sample rate 1.028816 per second rx frequency 6470 file start time 2017-10-06 06:20:46.800 polynomial 16K21A crc size 8 number of chars 2 block size 20 symbol period 20.000 number of symbols 640 list length 2000 start offset 16761.200 freq offset 0.005000 cores 2 skipped 16761.014603 seconds to start initial reference phase -51.0 --------------------------------------------- found 15 list rank 282 reference phase 0 0 0 0 carrier S/N 9.78 dB in 78.1 uHz, -31.29 dB in 1Hz, -65.27 dB in 2.5kHz carrier Es/N0 -18.28 dB carrier Eb/N0 -0.79 dB info bit period 1122.81 seconds symbol error rate 296/640 = 46.250 % Es/N0 from symbol errors -23.5 dB Eb/N0 from symbol errors -6.0 dB Shannon capacity 3.8 bits/hour Shannon efficiency 83.8 % symbols file 10061046-symbols.csv elapsed 3 seconds --------------------------------------------- found 15 list rank 101 reference phase 30 30 30 30 carrier S/N 9.78 dB in 78.1 uHz, -31.29 dB in 1Hz, -65.27 dB in 2.5kHz carrier Es/N0 -18.28 dB carrier Eb/N0 -0.79 dB info bit period 1122.81 seconds symbol error rate 284/640 = 44.375 % Es/N0 from symbol errors -19.9 dB Eb/N0 from symbol errors -2.4 dB Shannon capacity 3.8 bits/hour Shannon efficiency 83.8 % symbols file 10061046-symbols.csv elapsed 7 seconds --------------------------------------------- found @P list rank 14 reference phase 90 90 90 90 carrier S/N 9.80 dB in 78.1 uHz, -31.27 dB in 1Hz, -65.25 dB in 2.5kHz carrier Es/N0 -18.26 dB carrier Eb/N0 -0.77 dB info bit period 1122.81 seconds symbol error rate 277/640 = 43.281 % Es/N0 from symbol errors -18.4 dB Eb/N0 from symbol errors -0.9 dB Shannon capacity 3.8 bits/hour Shannon efficiency 83.4 % symbols file 10061046-symbols.csv elapsed 24 seconds --------------------------------------------- found 15 list rank 68 reference phase 0 0 30 30 carrier S/N 10.01 dB in 78.1 uHz, -31.06 dB in 1Hz, -65.04 dB in 2.5kHz carrier Es/N0 -18.05 dB carrier Eb/N0 -0.56 dB info bit period 1122.81 seconds symbol error rate 287/640 = 44.844 % Es/N0 from symbol errors -20.7 dB Eb/N0 from symbol errors -3.2 dB Shannon capacity 4.0 bits/hour Shannon efficiency 79.5 % symbols file 10061046-symbols.csv elapsed 54 seconds --------------------------------------------- found 15 list rank 57 reference phase 0 -30 30 0 carrier S/N 10.28 dB in 78.1 uHz, -30.79 dB in 1Hz, -64.77 dB in 2.5kHz carrier Es/N0 -17.78 dB carrier Eb/N0 -0.29 dB info bit period 1122.81 seconds symbol error rate 295/640 = 46.094 % Es/N0 from symbol errors -23.1 dB Eb/N0 from symbol errors -5.6 dB Shannon capacity 4.3 bits/hour Shannon efficiency 74.7 % symbols file 10061046-symbols.csv elapsed 138 seconds --------------------------------------------- found ZO list rank 5 reference phase -120 -90 -120 -90 carrier S/N 10.17 dB in 78.1 uHz, -30.90 dB in 1Hz, -64.88 dB in 2.5kHz carrier Es/N0 -17.89 dB carrier Eb/N0 -0.40 dB info bit period 1122.81 seconds symbol error rate 280/640 = 43.750 % Es/N0 from symbol errors -19.0 dB Eb/N0 from symbol errors -1.5 dB Shannon capacity 4.2 bits/hour Shannon efficiency 76.6 % symbols file 10061046-symbols.csv elapsed 170 seconds --------------------------------------------- found ZO list rank 4 reference phase -90 -60 -120 -90 carrier S/N 10.25 dB in 78.1 uHz, -30.82 dB in 1Hz, -64.80 dB in 2.5kHz carrier Es/N0 -17.81 dB carrier Eb/N0 -0.32 dB info bit period 1122.81 seconds symbol error rate 277/640 = 43.281 % Es/N0 from symbol errors -18.4 dB Eb/N0 from symbol errors -0.9 dB Shannon capacity 4.3 bits/hour Shannon efficiency 75.2 % symbols file 10061046-symbols.csv elapsed 196 seconds ------=_Part_41919_2125484937.1507306663976--