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 w09JQf12027770 for ; Tue, 9 Jan 2018 20:26:44 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1eYzMt-0008Df-87 for rs_out_1@blacksheep.org; Tue, 09 Jan 2018 19:15:27 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1eYzMs-0008DW-Lh for rsgb_lf_group@blacksheep.org; Tue, 09 Jan 2018 19:15:26 +0000 Received: from mail-qk0-x232.google.com ([2607:f8b0:400d:c09::232]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1eYzMp-0006zf-Jg for rsgb_lf_group@blacksheep.org; Tue, 09 Jan 2018 19:15:25 +0000 Received: by mail-qk0-x232.google.com with SMTP id q1so2882225qkb.9 for ; Tue, 09 Jan 2018 11:15:23 -0800 (PST) X-DKIM-Result: Domain=gmail.com Result=Good and Known Domain DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to; bh=5NNnn6QuyCzjzC4hNK3BXcMKke9pf1IVai3EAg2tFE4=; b=BwAo6cmNYRHSBeyzsKsfckJ5vE1zOTr4pHorJKT6CphOBcyIaTO/gGvDC9BI1lHdKI 2+v8SqfXd96caT0q3eijj5AVTtaceJ9F8spYvYbH+It4r+DkWz6CMl+9tq9JJmV37gSu AO+aNYcN1dKy4407K6V9lDYf3Umj8oVH2XkCAcCbwR1gjeQZXYJLWuTRcTLOozx7wWWc aigpianaxqDOh0r3sO9GGEX+SsWemU3nk0FL2euB87Sr0Kq+uEiuhpDTqQtJ1xdWryTt lY2/lR3hPs13tnQcwUSCBcavB13/+G6JAg+ORpB3BpkBSYiULLtozTZKaUkTL+g/oRcr 0diQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to; bh=5NNnn6QuyCzjzC4hNK3BXcMKke9pf1IVai3EAg2tFE4=; b=idAvHbb7ZqhVwzsw2Jukd0nMqkx1lDRWNQ7GQW3HbvcBGbwD9KBxlA2T6TS7dm4wH9 mgFuMAgAOa/igclMw+2KKiFwM1PgMluWL32KiIMyl5P63TRUfSd7McVlUq0oQcHrL8N+ Uwl7JjsPNaxehgfiHHMAWC5BIfKrJiFeoBsgfAk8bzNk6PjZy0PM+wjIOndSxYx27Ekf zQAvMLgQQvKt5jl+nOJPHc2HF5gav7FrpNNwHOwIX3Wybh13xUkI8I+EI1oluUzQwC/d 8zeyX90EDHyrVqechRpQTk55t8sgl6kVl72/DAVW9Nt03kAV3NksKg731ShV2x/DJIPI BIkw== X-Gm-Message-State: AKwxytdidv9LQWMgifiGctjOYN92sGZJg5F304K5xN4eAFZEI9LCPAli d2O7+BbFgdyDzOxHjQRFgRcxSfxKQJ2foSvDxNg= X-Google-Smtp-Source: ACJfBouVwLy3Gy0XOfJ4TqT50gouNcXXQFmITVXd0To1Ve4uWZ/SLVAIEaLQ5RJKVTYMPQ1ScwS0iu5SFEQhBi/Uu/E= X-Received: by 10.55.155.134 with SMTP id d128mr24076090qke.240.1515525321913; Tue, 09 Jan 2018 11:15:21 -0800 (PST) MIME-Version: 1.0 Received: by 10.140.25.140 with HTTP; Tue, 9 Jan 2018 11:15:20 -0800 (PST) Received: by 10.140.25.140 with HTTP; Tue, 9 Jan 2018 11:15:20 -0800 (PST) In-Reply-To: <9fb65a40-484e-2a16-152e-36428d110b79@abelian.org> References: <160d0cc9190-1720-7a399@webjas-vaa200.srv.aolmail.net> <5A54E3EC.30107@posteo.de> <9fb65a40-484e-2a16-152e-36428d110b79@abelian.org> From: Riccardo Zoli Date: Tue, 9 Jan 2018 20:15:20 +0100 Message-ID: To: LF Group X-Spam-Score: 0.3 (/) 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 Paul, Stefan, Andy, Markus....VLF My specified QRG (printed with all decimals) is obviously theoretical. It permits, as Paul well explained, to achieve in days maximum reference phase precision for RX stations. The value is obtained by a simple calculation: [...] Content analysis details: (0.3 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (riccardozoli80[at]gmail.com) 0.2 FREEMAIL_ENVFROM_END_DIGIT Envelope-from freemail username ends in digit (riccardozoli80[at]gmail.com) 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: 87525734ac0bb319fb3f44295fe6963b Subject: Re: LF: EbNaut at 8270.01953125 Content-Type: multipart/alternative; boundary="94eb2c075b2c75fa4305625cbc4d" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: ** X-Spam-Status: No, hits=2.6 required=5.0 tests=FROM_ENDS_IN_NUMS,HTML_20_30, HTML_MESSAGE,MAILTO_TO_SPAM_ADDR,SUBJ_HAS_UNIQ_ID 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 --94eb2c075b2c75fa4305625cbc4d Content-Type: text/plain; charset="UTF-8" Hi Paul, Stefan, Andy, Markus....VLF My specified QRG (printed with all decimals) is obviously theoretical. It permits, as Paul well explained, to achieve in days maximum reference phase precision for RX stations. The value is obtained by a simple calculation: my GPSDO is tuned at 16384.000 kHz and clocking a DDS programmed with a tuning dword = 8671744. DDS output is finally divided by 4 (SDR quadrature generator). ((16384000 / 2^32) * 8671744) / 4 = *8270.01953125* Thanks for reports. This night, 5th attempt. Same parameters, start time 18:30 UTC. All the best 73 de Riccardo IW4DXW Il 09/Gen/2018 18:29, "Paul Nicholson" ha scritto: It is good to know the frequency to within 1uHz for VLF amateur radio. A 1uHz error amounts to a 30 degree phase error after one day, enough to significantly affect the stacking of repeats. Fortunately this is quite easy to achieve with GPS timing. Riccardo IW4DXW wrote: > QRG: 8270.01953125 > 3 chars > 60 sec/sym. > coding 16K21A > CRC 8 > duration: 12h 16' > start time 18:30 UTC Todmorden (1412.5 km) --------------------- 05/06 Eb/N0 +9.4 dB, S/N -24.7 dB/1Hz, phase -141.8 *Decoded* 06/07 Eb/N0 +10.7 dB, S/N -23.4 dB/1Hz, phase 99.3 *Decoded* 07/08 Eb/N0 +7.7 dB, H-field only, phase 178.4 *Decoded* 08/09 Eb/N0 +5.6 dB, S/N -62.5 dB/1Hz, phase 176.2 *Decoded* Bielefeld (845.3 km) -------------------- 05/06 Eb/N0 -3.7 dB, S/N -37.8 dB/1Hz, phase -30.8; 06/07 Eb/N0 +3.5 dB, S/N -30.6 dB/1Hz, phase -163.3 *Decoded* 07/08 Eb/N0 +4.0 dB, S/N -30.1 dB/1Hz, phase -66.4 *Decoded* 08/09 Eb/N0 -4.2 dB, S/N -38.4 dB/1Hz, phase -72.8; Cumiana (370.5 km) ------------------ 05/06 Eb/N0 -7.7 dB, S/N -41.8 dB/1Hz, phase 102.4; 06/07 Eb/N0 +1.2 dB, S/N -32.9 dB/1Hz, phase -54.9 *Decoded* 07/08 Eb/N0 -2.5 dB, S/N -36.6 dB/1Hz, phase 20.5; 08/09 Eb/N0 -7.6 dB, S/N -41.8 dB/1Hz, phase 102.0; Warsaw (1035.0 km) ------------------ 05/06 Eb/N0 -4.9 dB, S/N -39.0 dB/1Hz, phase -62.3; 06/07 Eb/N0 -15.6 dB, S/N -49.7 dB/1Hz; 07/08 Eb/N0 -8.7 dB, S/N -42.8 dB/1Hz, phase -63.2; 08/09 No data from rx site, uplink off; -- Paul Nicholson -- --94eb2c075b2c75fa4305625cbc4d Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable

Hi Pau= l, Stefan, Andy, Markus....VLF

My specifie= d QRG (printed with all decimals) is obviously theoretical. It permits, as = Paul well explained, to achieve in days maximum reference phase precision f= or RX stations.
The value is obtained by a simple ca= lculation:

my GPSDO is t= uned at 16384.000 kHz and clocking a DDS programmed with a tuning dword =3D= 8671744. DDS output is finally divided by 4 (SDR quadrature generator).

((16384000 / 2^32) * 86717= 44) / 4 =3D
8270.01953125

Thanks for reports.
This night, 5th attempt.
Same parameters, sta= rt time 18:30 UTC.


<= /div>
All the best


73 de Riccardo IW4DXW





Il 09/Gen/2018 18:29, "Paul Nicholson" <vlf0403@abelian.org> ha scritto:

It is good to know the frequency to within 1uHz for VLF
amateur radio.=C2=A0 =C2=A0A 1uHz error amounts to a 30 degree
phase error after one day, enough to significantly
affect the stacking of repeats.=C2=A0 Fortunately this is
quite easy to achieve with GPS timing.


Riccardo IW4DXW wrote:

> QRG: 8270.01953125
> 3 chars
> 60 sec/sym.
> coding 16K21A
> CRC 8
> duration: 12h 16'

>=C2=A0 start time 18:30 UTC

Todmorden (1412.5 km)
---------------------

=C2=A005/06 Eb/N0=C2=A0 +9.4 dB, S/N -24.7 dB/1Hz, phase -141.8 *Decoded* =C2=A006/07 Eb/N0 +10.7 dB, S/N -23.4 dB/1Hz, phase=C2=A0 =C2=A099.3 *Decod= ed*
=C2=A007/08 Eb/N0=C2=A0 +7.7 dB, H-field only,=C2=A0 =C2=A0 =C2=A0phase=C2= =A0 178.4 *Decoded*
=C2=A008/09 Eb/N0=C2=A0 +5.6 dB, S/N -62.5 dB/1Hz, phase=C2=A0 176.2 *Decod= ed*


Bielefeld (845.3 km)
--------------------

=C2=A005/06 Eb/N0 -3.7 dB, S/N -37.8 dB/1Hz, phase=C2=A0 -30.8;
=C2=A006/07 Eb/N0 +3.5 dB, S/N -30.6 dB/1Hz, phase -163.3 *Decoded*
=C2=A007/08 Eb/N0 +4.0 dB, S/N -30.1 dB/1Hz, phase=C2=A0 -66.4 *Decoded* =C2=A008/09 Eb/N0 -4.2 dB, S/N -38.4 dB/1Hz, phase=C2=A0 -72.8;


Cumiana (370.5 km)
------------------

=C2=A005/06 Eb/N0 -7.7 dB, S/N -41.8 dB/1Hz, phase 102.4;
=C2=A006/07 Eb/N0 +1.2 dB, S/N -32.9 dB/1Hz, phase -54.9 *Decoded*
=C2=A007/08 Eb/N0 -2.5 dB, S/N -36.6 dB/1Hz, phase=C2=A0 20.5;
=C2=A008/09 Eb/N0 -7.6 dB, S/N -41.8 dB/1Hz, phase 102.0;


Warsaw (1035.0 km)
------------------

=C2=A005/06 Eb/N0=C2=A0 -4.9 dB, S/N -39.0 dB/1Hz, phase -62.3;
=C2=A006/07 Eb/N0 -15.6 dB, S/N -49.7 dB/1Hz;
=C2=A007/08 Eb/N0=C2=A0 -8.7 dB, S/N -42.8 dB/1Hz, phase -63.2;
=C2=A008/09 No data from rx site, uplink off;

--
Paul Nicholson
--


--94eb2c075b2c75fa4305625cbc4d--