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=-1.4 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, NO_REAL_NAME 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 tA7EnQ6u006935 for ; Sat, 7 Nov 2015 15:49:27 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Zv4l0-0006q5-U9 for rs_out_1@blacksheep.org; Sat, 07 Nov 2015 14:46:18 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Zv4l0-0006pw-LV for rsgb_lf_group@blacksheep.org; Sat, 07 Nov 2015 14:46:18 +0000 Received: from nina.ucs.mun.ca ([134.153.232.76]) by relay1.thorcom.net with esmtps (TLSv1:DHE-RSA-AES256-SHA:256) (Exim 4.86) (envelope-from ) id 1Zv4k6-000390-98 for rsgb_lf_group@blacksheep.org; Sat, 07 Nov 2015 14:46:17 +0000 Received: from plato.ucs.mun.ca (plato.ucs.mun.ca [134.153.232.153]) by nina.ucs.mun.ca (8.13.1/8.13.1) with ESMTP id tA7Ej0Oi005940 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Sat, 7 Nov 2015 11:15:00 -0330 Date: Sat, 7 Nov 2015 11:15:00 -0330 (NST) From: jcraig@mun.ca X-X-Sender: jcraig@plato.ucs.mun.ca To: rsgb_lf_group@blacksheep.org In-Reply-To: <66B3F0D918D0471AA6E64E8D19BABAA2@White> Message-ID: References: <66B3F0D918D0471AA6E64E8D19BABAA2@White> MIME-Version: 1.0 X-Scan-Signature: 32d4aaaf019758ff5a0d8e92eec683e6 Subject: Re: LF: VO1NA opds-32 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed 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 10.1.3.10 Status: O X-Status: X-Keywords: X-UID: 4875 LF Group, Again, thanks to SV8RV DF2JP PA7EY and DF6NM for the reports. In my last post I reported the drift was constrained to within 1 Hz. This should be 1 mHz. Thanks Markus for your assurances that this should be adequate for EbNaut which I hope to use to send send our cat's name on LF. The little curls appear often on the QRSS traces on your high res spectra. Doppler variations were removed from the 10 MHz WWV signals with harmonic regression when the DOCXO was calibrated so this effect is seen on LF but not as strongly. After reading about EbNaut on Paul Nicholson's pages it seems I have much catching up ahead. Fasinating stuff! Can the EbNaut phase inversions be done without an absolute time reference? I'm cheap and lazy so hoping GPS will not be needed. The Opera will be doing an encore tonight and if the wind stays low a tower climbing expedition is planned for the afternoon. 73 Joe VO1NA On Sat, 7 Nov 2015, Markus Vester wrote: > Hi Joe, LF, > > during the last couple of nights, opds detected all of your transmissions between about 22 and 7:30 UT. > > Attached is a zoomed 40 mHz section from my opds-32 spectrogram, showing your central coherent carrier which contains half of the transmitted average power. It seems to be about 0.5 mHz below 137477 Hz (possibly due to a calibration error in my receiver). The 2.7 mHz spaced sidelines during the early part (bottom) were caused by 6-minute-periodic interruptions from my own MF WSPR transmissions. However the little curls near the carrier can presumably be attributed to Doppler-shifted multipath components. The carrier was still weakly visible for another hour after the last detection. > > Comparing the looks of the carrier to earlier IZ7SLZ transmissions, the stability of the signal and the path seems quite sufficient for half-hour EbNaut PSK transmissions. Unfortunately I missed the opportunity to save the raw data and analyze phase evolution using the EbNaut decoder itself - will try that next time. > > All the best, > Markus (DF6NM) > > > > > From: jcraig@mun.ca > Sent: Saturday, November 07, 2015 12:03 AM > To: rsgb_lf_group@blacksheep.org > Subject: Re: LF: last night opera opds detection in km07ks > > > LF Group, > > > I am grateful to Joe DF2JP for his captures QRSS and Opera > Dionysious SV8RV for his OP decodes to Domenico IZ7SLZ > for his OPDS decodes, and thanks to DF6NM for opds! > > I do not know if my DOCXO is stable enough for EbNaut. > It was set a couple of years ago and has not drifted more than > 1 Hz since then. It seems the phase decoherence has stopped > haunting me. > > I am hoping to replace the halyard for the other 100m wire soon. > > OP32 again tonight as send this email. > > 73 > Joe > >