Return-Path: Received: (qmail 14086 invoked from network); 23 Jan 2001 12:27:19 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 23 Jan 2001 12:27:19 -0000 Received: (qmail 14775 invoked from network); 23 Jan 2001 12:30:48 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 23 Jan 2001 12:30:48 -0000 Content-Transfer-Encoding: 8bit Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14L2Tn-0008Si-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 23 Jan 2001 12:23:19 +0000 Received: from bob.dera.gov.uk ([192.5.29.90]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14L2Tk-0008Sd-00 for rsgb_lf_group@blacksheep.org; Tue, 23 Jan 2001 12:23:16 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: by bob.dera.gov.uk; (8.8.8/1.3/10May95) id MAA31168; Tue, 23 Jan 2001 12:24:30 GMT Received: (qmail 26387 invoked from network); 23 Jan 2001 13:16:40 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from gauntlet.mail.dera.gov.uk (172.16.9.10) by baton.dera.gov.uk with SMTP; 23 Jan 2001 13:16:40 -0000 Received: by gauntlet.mail.dera.gov.uk; id NAA27480; Tue, 23 Jan 2001 13:08:04 GMT Received: from unknown(10.71.64.31) by gauntlet.mail.dera.gov.uk via smap (3.2) id xma027406; Tue, 23 Jan 01 13:07:31 GMT Received: from FRN-MAIL-3.dera.gov.uk (unverified) by mailguard.dera.gov.uk (Content Technologies SMTPRS 4.1.5) with ESMTP id for ; Tue, 23 Jan 2001 12:25:47 +0000 Received: by frn-mail-3.dera.gov.uk with Internet Mail Service (5.5.2650.21) id ; Tue, 23 Jan 2001 12:22:17 -0000 Message-ID: <65AECDF1F89AD411900400508BFC869F0D754E@pdw-mail-1.dera.gov.uk> From: "Talbot Andrew" To: rsgb_lf_group@blacksheep.org Subject: LF: RE: Larry's signals last night 22/23 Jan Date: Tue, 23 Jan 2001 12:22:20 -0000 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2650.21) Content-Type: text/plain; charset=iso-8859-1; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: I agree with the best times, certainly after 0700z signals rise and noise levels fall. In fact, most mornings I see a quite abrupt drop in noise level a bit before 0700, well before streetlights go off. Haven't been able to identify the source of this noise change so far. Also short lived periods during the night. Both Dave and John are getting slightly better reception than I can achieve, particularly in the morning session - are you using the normal vertical antennas for reception ? Certainly haven't been able to make out as much of today's CW message as Dave's plot timed at 0800 today shows. I've been recording raw data, I/Q sampled at 3.9Hz and sending these to Bill VE3IQ for analysis. After filtering and smoothing the phase of the signal can be extracted, Hopefully, this will allow the propagation path to be characterised to levels greater than amplitude measurement alone will give. The on off keying does give a slight problem but after adequate filtering its effects can be removed leaving a plain carrier whose phase can be measured over the entire transmission period. Andy G4JNT -- The Information contained in this E-Mail and any subsequent correspondence is private and is intended solely for the intended recipient(s). For those other than the recipient any disclosure, copying, distribution, or any action taken or omitted to be taken in reliance on such information is prohibited and may be unlawful.