Return-Path: X-Spam-DCC: paranoid 1233; Body=2 Fuz1=2 Fuz2=2 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, HTML_40_50,HTML_MESSAGE,SPF_PASS,UNPARSEABLE_RELAY autolearn=no version=3.1.3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id u3BGQ9Um006769 for ; Mon, 11 Apr 2016 18:26:09 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1apeYe-0003ic-Nd for rs_out_1@blacksheep.org; Mon, 11 Apr 2016 17:19:24 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1apeYe-0003iT-Bh for rsgb_lf_group@blacksheep.org; Mon, 11 Apr 2016 17:19:24 +0100 Received: from omr-m005e.mx.aol.com ([204.29.186.5]) by relay1.thorcom.net with esmtps (TLSv1:DHE-RSA-AES256-SHA:256) (Exim 4.87) (envelope-from ) id 1apeYb-0007lx-PN for rsgb_lf_group@blacksheep.org; Mon, 11 Apr 2016 17:19:23 +0100 Received: from mtaomg-mce01.mx.aol.com (mtaomg-mce01.mx.aol.com [172.29.27.207]) by omr-m005e.mx.aol.com (Outbound Mail Relay) with ESMTP id 65DCE38000BA for ; Mon, 11 Apr 2016 12:19:19 -0400 (EDT) Received: from core-acb09h.mail.aol.com (core-acb09.mail.aol.com [172.27.24.9]) by mtaomg-mce01.mx.aol.com (OMAG/Core Interface) with ESMTP id 251DC38000083 for ; Mon, 11 Apr 2016 12:19:19 -0400 (EDT) Received: from 192.35.17.16 by webprd-m08.mail.aol.com (10.74.22.253) with HTTP (WebMailUI); Mon, 11 Apr 2016 12:19:18 -0400 Date: Mon, 11 Apr 2016 12:19:18 -0400 From: Markus Vester To: rsgb_lf_group@blacksheep.org Message-Id: <154061ebe71-71ed-9875@webprd-m08.mail.aol.com> MIME-Version: 1.0 X-MB-Message-Source: WebUI X-MB-Message-Type: User X-Mailer: JAS STD X-Originating-IP: [192.35.17.16] x-aol-global-disposition: G X-AOL-VSS-INFO: 5800.7501/109321 X-AOL-VSS-CODE: clean DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mx.aol.com; s=20150623; t=1460391559; bh=OU/ETuvxu3q4k0A8U+7X456sIMZqCjHxTKUlhPkVnP0=; h=From:To:Subject:Message-Id:Date:MIME-Version:Content-Type; b=M0ny/9MokPuubmCfdFqyD4pbghWnupDRVyz2UDdzzoIeF+hvRoB67lihDxytWdKfy T/Ai0QeceOzqm1tQCbdcejXhWWKApUr+oaTK3hKzxiRweF4yY4yG1Noyd6xKt/kcv6 0jEd6XOmTuUk79vvf+skNpQ9pQDUc8A076YnbwlU= x-aol-sid: 3039ac1d1bcf570bce872d9b X-Scan-Signature: 7117f452ff11af9bac782a916713f0d7 Subject: Re: VLF: 8269.990Hz Content-Type: multipart/mixed; boundary="----=_Part_48472_624741848.1460391558766" 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 X-Scanned-By: MIMEDefang 2.56 on 10.1.3.11 Status: O X-Status: X-Keywords: X-UID: 7656 ------=_Part_48472_624741848.1460391558766 Content-Type: multipart/alternative; boundary="----=_Part_48471_1796527924.1460391558765" ------=_Part_48471_1796527924.1460391558765 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Uwe,=20 ... me too ;-) I was actually surprised about the successful decode because= the nighttime carrier was well visible in Heidelberg but not at all in my = spectrogram. =20 Anyway both our decodes were close to the limit, so for the next step I wou= ld suggest to try 5 char but stay with 30 sec symbols. Due to the FEC and C= RC overhead, going from 3 to 5 characters (1.667 x payload) will increase t= he total time only by a factor of 1.23 so we already loose 1.32 dB sensiti= vity. Shortening the symbols from 30 to 20 seconds would cost another 1.76 = dB. Thanks for the test! All the best, Markus (DF6NM) =20 =20 -----Urspr=C3=BCngliche Mitteilung-----=20 Von: DK7FC An: rsgb_lf_group Verschickt: Mo, 11 Apr 2016 2:56 pm Betreff: Re: VLF: 8269.990Hz Hello Uwe,=20 Thanks for the VLF transmission. No problem to decode the message! Seeattac= hment.=20 If Markus can decode and no other station wants to try, maybe we cantry 20s= symbols and 5 characters, your callsign for example :-) As you probably saw, i saw your carrier on 8269.99 Hz in my 6000 windowin t= he city but not in the forest. Either it is a propagationphenomenon that i = don't understand yet or there is still somethingwrong with the drift calibr= ation. I will today go on the tree again tore-configure the GPS-module and = see if this makes a difference... 73, Stefan Am 10.04.2016 22:30, schrieb uwe-jannsen@kabelmail.de: =20 =20 the carrieris on the air. the message:=20 =20 start2016-04-11 07:00:00 =20 coding 8K19A =20 CRC 16 =20 period 30 =20 length 3 =20 duration 03:28:00:00 =20 Have fun Uwe/dj8wx ------=_Part_48471_1796527924.1460391558765 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
Uwe,
 
... me too ;-) I was actually surprised about the succe= ssful decode because the nighttime carrier was well visible in Heidelberg b= ut not at all in my spectrogram.
 
Anyway both our decodes were close to the limit, so for the next = step I would suggest to try 5 char but stay with 30 sec symbols. Due t= o the FEC and CRC overhead, going from 3 to 5 characters (1.= 667 x payload) will increase the total time only by a factor of&n= bsp; 1.23 so we already loose 1.32 dB sensitivity. Shortening the= symbols from 30 to 20 seconds would cost another 1.76 dB.
 
Thanks for the test!
 
All the best,
Markus (DF6NM)
 
 
-----Urspr=C3=BCngliche Mitteilung-----
Von: DK7FC <selberdenken@posteo.de>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschickt: Mo, 11 Apr 2016 2:56 pm
Betreff: Re: VLF: 8269.990Hz

Hello Uwe,

Thanks for the VLF transmission. No problem to decode the message! See attachment.
If Markus can decode and no other station wants to try, maybe we can try 20s symbols and 5 characters, your callsign for example :-)

As you probably saw, i saw your carrier on 8269.99 Hz in my 6000 window in the city but not in the forest. Either it is a propagation phenomenon that i don't understand yet or there is still something wrong with the drift calibration. I will today go on the tree again to re-configure the GPS-module and see if this makes a difference...

73, Stefan

Am 10.04.2016 22:30, schrieb uwe-jannsen@kabelmail.d= e:
=20
=20
the carrier is on the air.
the message:
=20
start 2016-04-11 07:00:00
=20
coding 8K19A
=20
CRC 16
=20
period 30
=20
length 3
=20
duration 03:28:00:00
=20
Have fun
Uwe/dj8wx

 ------=_Part_48471_1796527924.1460391558765-- ------=_Part_48472_624741848.1460391558766 Content-Type: text/plain; charset=us-ascii; name=04110912-log.txt Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename="04110912-log.txt" ebnaut-rx V0.4b input file 04110912.wav sample rate 0.516064 per second rx frequency 8270 file start time 2016-04-11 07:00:02.990 polynomial 8K19A crc size 16 number of chars 3 block size 34 symbol period 30.000 number of symbols 416 list length 20000 start offset 4.000 freq offset -0.010000 cores 2 initial reference phase 57.4 --------------------------------------------- found 7FC list rank 1802 reference phase 180 180 180 180 carrier RMS 7.272e+003 noise RMS 1.514e+003 carrier S/N 13.63 dB in 80.1 uHz carrier Es/N0 -12.56 dB carrier Eb/N0 1.30 dB info bit period 729.82 seconds symbol error rate 167/416 = 40.144 % Es/N0 from symbol errors -15.0 dB Eb/N0 from symbol errors -1.1 dB Shannon capacity 9.3 bits/hour Shannon efficiency 52.8 % symbols file 04110912-symbols.csv elapsed 1 seconds --------------------------------------------- found 7FC list rank 15 reference phase 150 150 150 150 carrier RMS 7.272e+003 noise RMS 1.514e+003 carrier S/N 13.63 dB in 80.1 uHz carrier Es/N0 -12.56 dB carrier Eb/N0 1.30 dB info bit period 729.82 seconds symbol error rate 167/416 = 40.144 % Es/N0 from symbol errors -15.0 dB Eb/N0 from symbol errors -1.1 dB Shannon capacity 9.3 bits/hour Shannon efficiency 52.8 % symbols file 04110912-symbols.csv elapsed 5 seconds --------------------------------------------- found 7FC list rank 3 reference phase 150 150 120 120 carrier RMS 7.507e+003 noise RMS 1.514e+003 carrier S/N 13.91 dB in 80.1 uHz carrier Es/N0 -12.28 dB carrier Eb/N0 1.58 dB info bit period 729.82 seconds symbol error rate 161/416 = 38.702 % Es/N0 from symbol errors -13.8 dB Eb/N0 from symbol errors 0.1 dB Shannon capacity 9.9 bits/hour Shannon efficiency 49.6 % symbols file 04110912-symbols.csv elapsed 16 seconds --------------------------------------------- found 7FC list rank 12 reference phase 180 150 150 120 carrier RMS 7.396e+003 noise RMS 1.514e+003 carrier S/N 13.78 dB in 80.1 uHz carrier Es/N0 -12.41 dB carrier Eb/N0 1.45 dB info bit period 729.82 seconds symbol error rate 160/416 = 38.462 % Es/N0 from symbol errors -13.6 dB Eb/N0 from symbol errors 0.3 dB Shannon capacity 9.7 bits/hour Shannon efficiency 51.1 % symbols file 04110912-symbols.csv elapsed 41 seconds ------=_Part_48472_624741848.1460391558766--