Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-2.3 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, RCVD_IN_DNSWL_MED,SPF_PASS,T_DKIM_INVALID autolearn=ham autolearn_force=no version=3.4.0 X-Spam-DCC: EATSERVER: mailn 1166; Body=2 Fuz1=2 Fuz2=2 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by lipkowski.org (8.14.4/8.14.4/Debian-8+deb8u1) with ESMTP id v4B7uFmY007832 for ; Thu, 11 May 2017 09:56:16 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1d8iu1-0001jH-7F for rs_out_1@blacksheep.org; Thu, 11 May 2017 08:52:49 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1d8iu0-0001j8-LT for rsgb_lf_group@blacksheep.org; Thu, 11 May 2017 08:52:48 +0100 Received: from porthos.netcom.co.uk ([217.72.171.73]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1d8itx-0004Mo-1h for rsgb_lf_group@blacksheep.org; Thu, 11 May 2017 08:52:47 +0100 X-DKIM-Result: Domain=abelian.org Result=Signature OK DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=abelian.org ; s=default; h=Content-Transfer-Encoding:Content-Type:In-Reply-To: MIME-Version:Date:Message-ID:From:To:References:Reply-To:Subject:Sender:Cc: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=qUy+dZ3IZPZkNnoPovlAHoL62py8MWhVWwuPja/USXI=; b=QevpepQiyG30TOID/Zjj/PEyoh Qt/+3iIaFzBRyRmo8jXgnullZgWwCS6mkCpuyr1RJ71h3chuc9CkFnyBxYrJULGJ9/oNoWd8o1HBx 4i9tevim/ipycxeeWXh7AsOZExSXamJZJbeKED0niT37pnHvobMyIXd0MZw1fvS4UHEI=; Received: from i-194-106-52-83.freedom2surf.net ([194.106.52.83]:53630 helo=pn.abelian.org) by porthos.netcom.co.uk with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1d8itw-0006GL-Ob for rsgb_lf_group@blacksheep.org; Thu, 11 May 2017 08:52:44 +0100 Received: from [127.0.0.1] (localhost [127.0.0.1]) by pn.abelian.org (Postfix) with ESMTP id 30DF440028E for ; Thu, 11 May 2017 07:52:44 +0000 (UTC) References: <1494434057.289033747@f20.i.mail.ru> To: rsgb_lf_group@blacksheep.org From: Paul Nicholson Message-ID: Date: Thu, 11 May 2017 07:52:44 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.5.1 MIME-Version: 1.0 In-Reply-To: X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - porthos.netcom.co.uk X-AntiAbuse: Original Domain - blacksheep.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - abelian.org X-Get-Message-Sender-Via: porthos.netcom.co.uk: authenticated_id: catchall@abelian.org X-Authenticated-Sender: porthos.netcom.co.uk: catchall@abelian.org X-Scan-Signature: 290c8768709872f914a4ca71ad6bfe49 Subject: Re: LF: my results on VLF 05-08 May 2017 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit 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 2.75 Status: RO X-Status: X-Keywords: X-UID: 11664 Alex wrote: > {06 May 18:10 6470.1 2-char} transmissions. > http://rn3aus.narod.ru/ebnaut-6470-06may2017-1810z.zip Sorry this one did not decode. The message is there, at offset +636 seconds but the Eb/N0 is only -1.6 dB. Incidentally, the command I use on Linux to decode from these WAV files is (for the 4-char message) dd if=ebnaut06_MAY_0136_8270-1pps.wav bs=1 skip=124 | od -v -An -w8 -tfF | ebnaut -dp16K21A -N4 -S40 -r0.342935 -PS -c8 -k6 -L100 -v -T1001 'dd' strips off the header by skipping 124 bytes and 'od' converts the 32 bit IEEE floats to two columns of ASCII numbers for input to ebnaut. The 4-char WAV header contained timestamp 1494010730.79 = 2017-05-05_18:58:50.79 and the message started at 2017-05-05_19:15 = 1494011700.00 so the start offset for EbNaut should be 1494011700.00 - 1494010730.79 = 969.21 but the message was found at offset 1001. For the 2-char WAV 1494093574.79 2017-05-06_17:59:34.79 Msg 1494094200.00 2017-05-06_18:10:00.00 Offset should be: +625.21 Message found at: +636.00 Eb/N0 with the +625.21 drops to -3.7 dB due to the symbol misalignment. -- Paul Nicholson --