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Wed, 16 Nov 2016 18:48:16 +0000 (UTC) References: <154c32c4dba-373a-24653@webprd-m58.mail.aol.com> <5819E3AA.3020906@posteo.de> <581A452F.6060506@abelian.org> <581A4BC6.9030106@abelian.org> <581A541E.9050406@abelian.org> <581A8098.8050909@posteo.de> <581C3027.8050003@abelian.org> <581C8660.1070709@posteo.de> <581C90C7.5030809@abelian.org> <581C95BC.6010602@posteo.de> <581DA8E4.5010701@abelian.org> <581DB9C0.10602@posteo.de> <581DCF2E.5090902@abelian.org> <581F9797.9060709@abelian.org> <5824A47D.3060108@posteo.de> <58260EC4.70903@abelian.org> <58261368.60901@posteo.de> <58261772.3050508@abelian.org> <5826BF91.6070907@abelian.org> <5826DB6E.1060000@abelian.org> <58276523.4000204@abelian.org> <5829D9E1.2020801@posteo.de> <582A0BF2.5070101@abelian.org> <582AB6CD.5090603@abelian.org> <582B12B2.7080708@posteo.de> <582B3823.8090504@abelian.org> <582B4466.5070106@abelian.org> <582B6E8B.4090207@posteo.de> <117DEE4AF4DD44F59CB 455664AD7695B@gnat> <046701d23fb3$ab36d900$01a48b00$@comcast.net> <582C19D6.5080808@abelian.org> To: rsgb_lf_group@blacksheep.org From: Paul Nicholson Message-ID: <582CA9F0.2040306@abelian.org> Date: Wed, 16 Nov 2016 18:48:16 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.8.0 MIME-Version: 1.0 In-Reply-To: <582C19D6.5080808@abelian.org> 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: ac0f6ff1af52b6036ac1f4fe0c2bd52c Subject: Re: VLF: EbNaut transmissions on lower frequencies?, pre-tests: 6.47kHz 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 2.56 on 10.1.3.11 Content-Length: 1290 Status: O X-Status: X-Keywords: X-UID: 9480 Summing after each reception normalised to relative noise RMS 1.0; S/N is dB in 2500 Hz; Day tests: Eb/N0 S/N Phase RMS 11th Nov 3.9 -62.5 -141.2 2.56 12th Nov 4.9 -59.7 -134.3 2.01 11th to 12th 7.5 -57.9 -137.1 13th Nov 8.5 -55.6 -138.5 1.07 11th to 13th 9.6 -53.8 -137.8 14th 3.5 -61.3 -136.8 2.48 11th to 14th 10.4 -53.1 -137.6 15th 1.1 -64.0 -139.9 3.59 11th to 15th 10.7 -52.9 -137.8 16th 5.0 -60.8 -140.8 2.45 11th to 16th 11.0 -52.2 -137.4 Night tests: Eb/N0 S/N Phase 15th Nov -3.0 -67.8 -34.0 no decode I wrote: > Later I'll fire up LWPC and plot some examples of long > distance paths. For 1uW ERP, DK7FC to Todmorden http://abelian.org/vlf/tmp/1479317903_9356.png Daytime signal -34dBuV/m corresponds to about 0.03 fT DK7FC to vlf35 Virginia http://abelian.org/vlf/tmp/1479318501_18872.png -54dBuV/m, about 20dB weaker than Todmorden reception, would need 100 days summation to build up the same signal. DK7FC to Tasmania: http://abelian.org/vlf/tmp/1479318832_10010.png A crazy looking diurnal. At -145dBuV/m, even a century of summing wouldn't come anywhere close to this. Sorry Edgar. -- Paul Nicholson --