Return-Path: X-Spam-DCC: paranoid 1117; 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=-0.4 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, FORGED_AOL_TAGS,HTML_30_40,HTML_MESSAGE,UNPARSEABLE_RELAY 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 tACBkrU4022714 for ; Thu, 12 Nov 2015 12:46:53 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1ZwqH8-0002Je-FZ for rs_out_1@blacksheep.org; Thu, 12 Nov 2015 11:42:46 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1ZwqH7-0002JV-TV for rsgb_lf_group@blacksheep.org; Thu, 12 Nov 2015 11:42:45 +0000 Received: from omr-m015e.mx.aol.com ([204.29.186.15]) by relay1.thorcom.net with esmtps (TLSv1:DHE-RSA-AES256-SHA:256) (Exim 4.86) (envelope-from ) id 1ZwqGC-0004Yt-Dm for rsgb_lf_group@blacksheep.org; Thu, 12 Nov 2015 11:42:44 +0000 Received: from mtaomg-mae02.mx.aol.com (mtaomg-mae02.mx.aol.com [172.26.254.144]) by omr-m015e.mx.aol.com (Outbound Mail Relay) with ESMTP id 3A8BF38000B4 for ; Thu, 12 Nov 2015 06:41:27 -0500 (EST) Received: from core-afa10d.mail.aol.com (core-afa10.mail.aol.com [172.27.24.10]) by mtaomg-mae02.mx.aol.com (OMAG/Core Interface) with ESMTP id C34D838000082 for ; Thu, 12 Nov 2015 06:41:26 -0500 (EST) References: <8D2EABAF0379B74-9084-3D874@webmail-vd017.sysops.aol.com> To: rsgb_lf_group@blacksheep.org In-Reply-To: <8D2EABAF0379B74-9084-3D874@webmail-vd017.sysops.aol.com> X-MB-Message-Source: WebUI MIME-Version: 1.0 From: Markus Vester X-MB-Message-Type: User X-Mailer: AOL Webmail BASIC Received: from 192.35.17.17 by webmail-vd012.sysops.aol.com (205.188.178.105) with HTTP (WebMailUI); Thu, 12 Nov 2015 06:41:26 -0500 Message-Id: <8D2EB5632CCBBF3-2188-4C745@webmail-vd012.sysops.aol.com> X-Originating-IP: [192.35.17.17] Date: Thu, 12 Nov 2015 06:41:26 -0500 x-aol-global-disposition: G X-AOL-VSS-INFO: 5700.7163/106887 X-AOL-VSS-CODE: clean DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mx.aol.com; s=20150623; t=1447328487; bh=BSdSytd0jy30Mg5D2xhy/yIgyIdZwwDKERFn1qQZu8s=; h=From:To:Subject:Message-Id:Date:MIME-Version:Content-Type; b=vYcIan4NWiLKoZoACfpCSe6SYAYjDMMwLIZ6pbdMzAJL4LifsWFW3aDXFw5pguR1Q WVSlvU4Y8IDg+Ov4r3Hqifm4QOc/y+Q9cAexomf2mPbclB4h+3nm6CBfMdtL1tMCIH vro2otl87nkL//m1SMysVhFcAT5nBAQdmUFEDCTA= x-aol-sid: 3039ac1afe9056447ae65177 X-Scan-Signature: 956413284a34c748fa4125c5c7fa4843 Subject: Re: LF: VO1NA frequency Content-Type: multipart/mixed; boundary="--------MB_8D2EB5632E22865_2188_AAFC1_webmail-vd012.sysops.aol.com" 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: 4992 This is a multi-part message in MIME format. ----------MB_8D2EB5632E22865_2188_AAFC1_webmail-vd012.sysops.aol.com Content-Type: multipart/alternative; boundary="--------MB_8D2EB5632E22865_2188_AAFC2_webmail-vd012.sysops.aol.com" ----------MB_8D2EB5632E22865_2188_AAFC2_webmail-vd012.sysops.aol.com Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Hi=20Joe,=0D=0A=C2=A0=0D=0Aan=20interesting=20change=20happened=20last=20night:=20= as=20far=20as=20I=20can=20see,=20your=20frequency=20has=20shifted=20to=20nominal= =20137477.000=20at=2022:45=20UT,=20and=20appeared=20to=20be=20rather=20stable=20= thereafter.=0D=0A=C2=A0=0D=0ARegarding=20EbNaut=20transmit:=20I=20haven't=20trie= d=20it=20on=20our=20RasPi=20yet.=20Both=20Domenico=20and=20I=20have=20run=20the=20= Windows=20version=20of=20ebnaut-tx,=20in=20conjunction=20with=20USB-to-serial=20= converters.=20RS-232=20lines=20are=20normally=20current-limited=20to=2020=20mA=20= so=20they=20can=20be=20directly=20connected=20to=20the=20DC-coupled=20IF=20input= =20of=20any=20ring=20mixer.=20On=20137=20kHz,=20I=20used=20a=20Minicircuits=20ZA= Y3.=20As=20I=20have=20a=20linear=20PA=20I=20inserted=20a=20simple=20500uF/100ohm= =20shaping=20filter=20to=20reduce=C2=A0keying=20sidebands,=20but=20this=20may=20= not=20be=20essential.=20This=20mixer=20won't=20work=20on=20VLF=208.3=20kHz=20so=20= I=20used=20an=20old=20telephone=20relay=20there,=20but=20due=20to=20contact=20bo= uncing=20the=20transitions=20were=20less=20than=20perfect.=20Domenico=20uses=20a= n=20SSB=20exciter=20on=20LF,=20and=20he=20made=20a=20dedicated=20diode=20mixer=20= with=20audio=20transformers=20to=20apply=20PSK=20on=201502=20Hz.=0D=0A=C2=A0=0D=0A= Our=20current=20receiving=20method=20re-uses=20opds32=20data=20files=20and=20is=20= thus=20limited=20to=20sequence=20durations=20of=20a=20bit=20over=20half=20an=20h= our.=20For=20example,=20using=20EbNaut=208K19A=20encoding=20with=201=20second=20= symbols=20would=20fit=2031=20characters=20into=2029.3=20minutes,=20and=20the=20m= essage=20could=20be=20repeated=20half-hourly.=20Yesterday=20your=20opds=20carrie= r=20was=20weakly=20visible=20until=20midday=20in=20Europe,=20so=20daytime=20TA=20= decodes=20might=20be=20possible=20using=20slower=20rates=20(e.g.=205=20seconds).= =20=0D=0A=C2=A0=0D=0AOur=20cat=20seems=20to=20be=20very=20curious=20about=20radi= o,=20so=20I=20thought=20he=20might=20feel=20a=20desire=20to=20communicate=20with= =20his=20fellows=20overseas.=20Rumour=20has=20it=20that=20at=20least=20in=20one=20= instance,=20Uwe's=20cat=C2=A0successfully=20managed=20to=20take=20control=20of=20= the=20DJ8WX=20VLF=20transmitter=20;-)=0D=0A=C2=A0=0D=0AAll=20the=20best,=20=0D=0A= Markus=20(DF6NM)=0D=0A=0D=0A=0D=0A=0D=0A=0D=0A-----Urspr=C3=BCngliche=20Mitteilu= ng-----=20=0D=0AVon:=20Markus=20Vester=20<markusvester@aol.com>=0D=0AAn:=20= rsgb_lf_group=20<rsgb_lf_group@blacksheep.org>=0D=0AVerschickt:=20Mi,=2011= =20Nov=202015=206:12=20pm=0D=0ABetreff:=20Re:=20LF:=20VO1NA=20frequency=0D=0A=20= =20=20=0D=0A=20=20=20Joe,=20=0D=0A=20=20=C2=A0=0D=0A=20=20more=20of=20the=20same= =20from=20last=20night,=20this=20time=20with=C2=A0frequency=20and=20level=20plot= s.=20Again=20we=20see=20some=20frequency=20variation=20of=20similar=20size=20as=20= yesterday.=20It=20is=20not=20clear=20how=20much=20of=20that=20is=20due=20to=20pr= opagation,=C2=A0I=20only=20think=20that=20the=C2=A0rise=C2=A0near=20the=20end=20= is=20due=20to=20Doppler=C2=A0from=20the=C2=A0descent=20of=20the=20ionosphere=20a= t=20sunrise.=C2=A0Russian=C2=A0Loran=20lines=20on=20137475=20and=20137482.5=20se= emed=20to=20have=20less=20overnight=20variation=20(~=200.1=20mHz),=20but=20then=20= of=20course=20the=20intra-European=20path=20from=20Slonim=20is=20very=20differen= t=20from=20yours.=C2=A0=0D=0A=20=20=C2=A0=0D=0A=20=20Regarding=20EbNaut=20carrie= r=20analysis:=C2=A0for=20some=20reason=20(lack=20of=20coffee?),=20I=20only=20saw= =20Domenico's=20earlier=20mail=20after=20I=20had=C2=A0sent=20mine,=20so=20please= =20excuse=20me=20for=20basically=20having=20described=C2=A0the=20same=20procedur= e=20again.=C2=A0Anyway=20it's=20good=20that=20we=C2=A0both=C2=A0arrived=20at=20t= he=20same=20conclusion:=C2=A0If=20Joe=20started=20sending=C2=A0EbNaut=20PSK=20wi= th=20his=C2=A0oscillator=20as=C2=A0it=20is=20now,=20we=20would=20very=20likely=20= be=20able=20to=20decode=20it=20here.=C2=A0=0D=0A=20=20=C2=A0=0D=0A=20=20Joe=20so= =20all=20you=20need=20now=20is=20a=20diode=20ring-mixer=20for=20PSK=20modulation= =20and=20Paul's=20ebnaut-tx=20program.=C2=A0Symbol=C2=A0timing=C2=A0will=C2=A0be= =20derived=20from=C2=A0the=20PC=20clock,=C2=A0so=20with=20NTP=C2=A0available=20t= here's=20no=20need=20to=20involve=20GPS=20at=20all.=20If=20Paul=20brought=20his=20= LF=20receiver=20back=20to=20life,=20he=20could=20probably=20copy=20you=20even=C2= =A0if=20you=20reduced=C2=A0TX=20power=20to=200.1=20Deccas.=0D=0A=20=20=C2=A0=0D=0A= =20=20How=20many=20cats=20do=20you=20have?=20We=20want=20to=20know=C2=A0names,=20= colours,=20sex=20and=20age=20for=20all=20of=20them=20;-)=0D=0A=20=20=C2=A0=0D=0A= =20=20All=20the=20best,=0D=0A=20=20Markus=20(DF6NM)=0D=0A=20=20=C2=A0=0D=0A=20=20= =C2=A0=0D=0A=20=20PS.=20SpecLab=20question:=20Wolf=20is=20there=20a=20way=20to=20= extract=20peak=20frequencies=20from=20past=20spectrogram=20lines=20(semi-)automa= tically,=20without=20having=20to=20manually=C2=A0move=C2=A0and=20read=20the=20mo= use=20cursor=20over=20each=20point,=20e.g.=20something=20like=20a=20peak_f(f1,f2= ,=20time)=20interpreter=20function?=0D=0A=20=0D=0A=20=20=C2=A0=0D=0A=20-----Ursp= r=C3=BCngliche=20Mitteilung-----=20=0D=0A=20Von:=20Markus=20Vester=20<markusv= ester@aol.com>=0D=0A=20An:=20rsgb_lf_group=20<rsgb_lf_group@blacksheep.org= >=0D=0A=20Verschickt:=20Mi,=2011=20Nov=202015=201:24=20am=0D=0A=20Betreff:=20= LF:=20VO1NA=20frequency=0D=0A=20=C2=A0=20=20=20=20=20=20=20=20=20Hi=20Joe,=0D=0A= =20=20=20=C2=A0=0D=0A=20=20=20the=20attached=20plot=20shows=20the=20=20frequency= =C2=A0stability=20of=C2=A0your=C2=A0opds=20trace=20received=20last=20=20night=C2= =A0http://df6nm.bplaced.net/LF/opds32_151110_0736.png=C2=A0.=20=20Each=20data=20= point=20is=20the=20interpolated=20peak=20of=20a=20=20single=20438=20uHz=20FFT=20= (i.e.=2038=20minute=20window).=20The=20average=20frequency=20seems=20to=20be=20=20= 0.7=20mHz=20below=C2=A0nominal,=20and=20there=20are=20small=20temporal=20variati= ons=C2=A0up=20=20to=C2=A00.5=20mHz=20in=20either=20direction.=C2=A0Though=20some= =20of=20that=C2=A0is=20=20probably=C2=A0attributable=C2=A0to=20noise=20and=20pro= pagation,=20I=20believe=20that=20there=20=20is=20also=20a=20bit=20of=20inherent=20= instability=20in=C2=A0the=20frequency=20=20source.=C2=A0Actually=20a=20few=20par= ts=20per=20billion=C2=A0is=20quite=20good=20for=20a=20free=20=20running=C2=A0OCX= O=20(assuming=20the=20"D"=20stands=20for=20=20"double=20oven"=20and=20not=20"dis= cipled"),=20and=20that=20the=20calibration=20was=20done=20over=20a=2010=20=20MHz= =C2=A0HF=20link.=0D=0A=20=20=20=C2=A0=0D=0A=20=20=20Is=20this=20good=20enough=20= for=20EbNaut?=20During=20the=20=20experiments=20with=20IZ7SLZ=20we=20found=20tha= t=20for=20full=20sensitivity=20the=20phase=20variation=20=20over=20the=20EbNaut=C2= =A0sequence=20duration=20should=20not=20be=20much=20more=20than=2090=C2=B0.=20Th= us=20=20for=20a=20half-hour=20message=20the=20frequency=20should=20be=20ideally=20= constant=20and=20known=20to=20=20about=200.14=20mHz.=20If=20there=20is=20more=20= variation=C2=A0we=C2=A0often=C2=A0can=20still=20=20get=C2=A0decodes,=20but=20we=20= will=20have=20to=20find=20the=20best=20frequency=20offset=20by=20trial=20=20and=20= error,=20which=20can=20be=20cumbersome=20if=20the=20signal=20is=20weak.=0D=0A=20= =20=20=C2=A0=0D=0A=20=20=20I=20also=20fed=20opds=20data=20files=20from=20your=20= Sat/Sun=20=20transmissions=20to=20the=20EbNaut=C2=A0decoder.=20The=20idea=20was=20= to=20see=20if=C2=A0your=20Opera=20=20transmissions=20would=20actually=20produce=C2= =A0the=20all-asterisk=C2=A0decode=20which=20is=20=20expected=20for=20a=20non-PSK= -keyed=20straight=20carrier,=20and=20to=20observe=20the=20symbol=20phase=20=20ev= olution=20over=20the=2038=20minute=20duration.=C2=A0Starting=20midnight=20UT,=20= one=20decode=20was=20attempted=20every=2030=20minutes,=20=20using=20a=20setting=20= for=20464=20raw=20symbols=20(4=20characters)=C2=A0and=205=20seconds=20per=20=20s= ymbol.=20A=C2=A0frequency=20offset=20of=20-0.6=20mHz=20was=C2=A0selected=C2=A0to= =20obtain=20=20flat=20phase=20during=20the=20first=20decodes,=20and=C2=A0that=20= offset=C2=A0was=C2=A0kept=20for=20=20all=20later=20attempts.=20Despite=20the=20O= pera=20gaps=20=20which=C2=A0degrade=20or=20drop=20half=20of=20the=20available=20= symbols,=C2=A012=20out=20of=2013=20=20decode=20attempts=C2=A0produced=20the=20=20= correct=C2=A0"****"=20message,=C2=A0e.g.=20http://df6nm.bplaced.net/LF/r0317.png= =20=20.=20However=20at=20times=20the=20frequency=20drift=20was=20quite=20visible= =C2=A0on=20the=C2=A0phase=20=20plot,=C2=A0e.g.=20in=20http://df6nm.bplaced.net/L= F/s0317.png=C2=A0(flat=20=20phase=20around=203:17)=20versus=20http://df6nm.bplac= ed.net/LF/s0347.png=C2=A0(upward=20=20phase=20slope=20around=203:47).=C2=A0=0D=0A= =20=20=20=C2=A0=0D=0A=20=20=20Scaling=20down=20to=20VLF,=20deviations=20from=20t= he=20same=20=20oscillator=20will=20be=2016x=20smaller=20(~30=20uHz=20at=208.3=20= kHz).=20This=20will=20be=20probably=20good=20=20enough=20even=20for=C2=A0narrow=20= FFT=20bins,=20corresponding=20to=20several=20hours=20coherent=20=20carrier=20int= egration=20or=20slow=20EbNaut=20decodes.=0D=0A=20=20=20=C2=A0=0D=0A=20=20=20All=20= the=20best,=0D=0A=20=20=20Markus=20(DF6NM)=0D=0A=20=20=20=20=20=0D=0A=20=0D=0A=20= =20=20=20=20From:=20jcraig@mun.ca=20=0D=0A=20=20=20Sent:=20Saturday,=20November=20= 07,=202015=203:45=20PM=0D=0A=20=20=20To:=20rsgb_lf_group@blacksheep.org=20=20=0D= =0A=20=20=20Subject:=20Re:=20LF:=20VO1NA=20opds-32=0D=0A=20=0D=0A=20=0D=0A=20=20= =20=0D=0A=20=0D=0A=20LF=20Group,=0D=0A=20=0D=0A=20Again,=20thanks=20to=20SV8RV=20= DF2JP=20PA7EY=20and=20DF6NM=20for=20=20the=20reports.=0D=0A=20=0D=0A=20In=20my=20= last=20post=20I=20reported=20the=20drift=20was=20constrained=20to=20=20within=20= 1=20Hz.=0D=0A=20This=20should=20be=201=20mHz.=C2=A0=20Thanks=20Markus=20for=20yo= ur=20assurances=20=20that=20this=0D=0A=20should=20be=20adequate=20for=20EbNaut=20= which=20I=20hope=20to=20use=20to=20send=20send=20our=20=20=0D=0A=20cat's=20name=20= on=20LF.=C2=A0=20The=20little=20curls=20appear=20often=20on=20the=20QRSS=20trace= s=20=20on=0D=0A=20your=20high=20res=20spectra.=C2=A0=20Doppler=20variations=20we= re=20removed=20from=20the=2010=20=20MHz=0D=0A=20WWV=20signals=20with=20harmonic=20= regression=20when=20the=20DOCXO=20was=20calibrated=0D=0A=20so=20=20this=20effect= =20is=20seen=20on=20LF=20but=20not=20as=20strongly.=0D=0A=20=0D=0A=20After=C2=A0= =20reading=20about=20=20EbNaut=20on=20Paul=20Nicholson's=20pages=20it=20seems=20= I=20have=20=0D=0A=20much=20catching=20up=20=20ahead.=C2=A0=20Fasinating=20stuff!= =0D=0A=20=0D=0A=20Can=20the=20EbNaut=20phase=20inversions=20be=20done=20=20witho= ut=20an=20absolute=20time=20=0D=0A=20reference?=C2=A0=20I'm=20cheap=20and=20lazy= =20so=20hoping=20GPS=20=20will=20not=20be=20needed.=0D=0A=20=0D=0A=20The=20Opera= =20will=20be=20doing=20an=20encore=20tonight=20and=20if=20the=20=20wind=20stays=20= low=0D=0A=20a=20tower=20climbing=20expedition=20is=20planned=20for=20the=20=20af= ternoon.=0D=0A=20=0D=0A=2073=0D=0A=20Joe=20VO1NA=0D=0A...=0D=0A=20=20=0D=0A=20=20= =0D=0A=20=0A=0A ----------MB_8D2EB5632E22865_2188_AAFC2_webmail-vd012.sysops.aol.com Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset="utf-8" =0D=0A=0D=0A=0D=0A
Hi=20Jo= e,
=0D=0A=0D=0A
 
=0D=0A=0D=0A
an=20interesting=20change=20= happened=20last=20night:=20as=20far=20as=20I=20can=20see,=20your=20frequency=20h= as=20shifted=20to=20nominal=20137477.000=20at=2022:45=20UT,=20and=20appeared=20t= o=20be=20rather=20stable=20thereafter.
=0D=0A=0D=0A
 
=0D=0A=0D= =0A
Regarding=20EbNaut=20transmit:=20I=20haven't=20tried=20it=20on=20our=20R= asPi=20yet.=20Both=20Domenico=20and=20I=20have=20run=20the=20Windows=20version=20= of=20ebnaut-tx,=20in=20conjunction=20with=20USB-to-serial=20converters.=20RS-232= =20lines=20are=20normally=20current-limited=20to=2020=20mA=20so=20they=20can=20b= e=20directly=20connected=20to=20the=20DC-coupled=20IF=20input=20of=20any=20ring=20= mixer.=20On=20137=20kHz,=20I=20used=20a=20Minicircuits=20ZAY3.=20As=20I=20have=20= a=20linear=20PA=20I=20inserted=20a=20simple=20500uF/100ohm=20shaping=20filter=20= to=20reduce keying=20sidebands,=20but=20this=20may=20not=20be=20essential.=20= This=20mixer=20won't=20work=20on=20VLF=208.3=20kHz=20so=20I=20used=20an=20old=20= telephone=20relay=20there,=20but=20due=20to=20contact=20bouncing=20the=20transit= ions=20were=20less=20than=20perfect.=20Domenico=20uses=20an=20SSB=20exciter=20on= =20LF,=20and=20he=20made=20a=20dedicated=20diode=20mixer=20with=20audio=20transf= ormers=20to=20apply=20PSK=20on=201502=20Hz.
=0D=0A=0D=0A
 
=0D= =0A=0D=0A
Our=20current=20receiving=20method=20re-uses=20opds32=20data=20fil= es=20and=20is=20thus=20limited=20to=20sequence=20durations=20of=20a=20bit=20over= =20half=20an=20hour.=20For=20example,=20using=20EbNaut=208K19A=20encoding=20with= =201=20second=20symbols=20would=20fit=2031=20characters=20into=2029.3=20minutes,= =20and=20the=20message=20could=20be=20repeated=20half-hourly.=20Yesterday=20your= =20opds=20carrier=20was=20weakly=20visible=20until=20midday=20in=20Europe,=20so=20= daytime=20TA=20decodes=20might=20be=20possible=20using=20slower=20rates=20(e.g.=20= 5=20seconds).=20
=0D=0A=0D=0A
 
=0D=0A=0D=0A
Our=20cat=20= seems=20to=20be=20very=20curious=20about=20radio,=20so=20I=20thought=20he=20migh= t=20feel=20a=20desire=20to=20communicate=20with=20his=20fellows=20overseas.=20Ru= mour=20has=20it=20that=20at=20least=20in=20one=20instance,=20Uwe's=20cat su= ccessfully=20managed=20to=20take=20control=20of=20the=20DJ8WX=20VLF=20transmitte= r=20;-)
=0D=0A=0D=0A
 
=0D=0A=0D=0A
All=20the=20best,=20<= br>=0D=0AMarkus=20(DF6NM)
=0D=0A
=0D=0A
=0D=0A=0D=0A

=0D=0A=0D=0A-----Urspr=C3=BCngliche=20Mitteilung-----=20
=0D=0AVon:=20Markus=20= Vester=20<markusvester@aol.com>
=0D=0AAn:=20rsgb_lf_group=20<rsgb_lf= _group@blacksheep.org>
=0D=0AVerschickt:=20Mi,=2011=20Nov=202015=206:12=20= pm
=0D=0ABetreff:=20Re:=20LF:=20VO1NA=20frequency
=0D=0A=20=0D=0A=20=20=0D=0A
=0D=0A=20=20=0D=0A
=20Joe,=20
=0D=0A=20=20=0D=0A
 =0D=0A=20=20=0D=0A
more=20of=20the=20same=20from=20last=20night,=20this=20t= ime=20with frequency=20and=20level=20plots.=20Again=20we=20see=20some=20fre= quency=20variation=20of=20similar=20size=20as=20yesterday.=20It=20is=20not=20cle= ar=20how=20much=20of=20that=20is=20due=20to=20propagation, I=20only=20think= =20that=20the rise near=20the=20end=20is=20due=20to=20Doppler fro= m=20the descent=20of=20the=20ionosphere=20at=20sunrise. Russian L= oran=20lines=20on=20137475=20and=20137482.5=20seemed=20to=20have=20less=20overni= ght=20variation=20(~=200.1=20mHz),=20but=20then=20of=20course=20the=20intra-Euro= pean=20path=20from=20Slonim=20is=20very=20different=20from=20yours. 
=0D= =0A=20=20=0D=0A
 
=0D=0A=20=20=0D=0A
Regarding=20EbNaut=20carr= ier=20analysis: for=20some=20reason=20(lack=20of=20coffee?),=20I=20only=20s= aw=20Domenico's=20earlier=20mail=20after=20I=20had sent=20mine,=20so=20plea= se=20excuse=20me=20for=20basically=20having=20described the=20same=20proced= ure=20again. Anyway=20it's=20good=20that=20we both arrived=20at=20= the=20same=20conclusion: If=20Joe=20started=20sending EbNaut=20PSK=20w= ith=20his oscillator=20as it=20is=20now,=20we=20would=20very=20likely=20= be=20able=20to=20decode=20it=20here. 
=0D=0A=20=20=0D=0A
 =0D=0A=20=20=0D=0A
Joe=20so=20all=20you=20need=20now=20is=20a=20diode=20r= ing-mixer=20for=20PSK=20modulation=20and=20Paul's=20ebnaut-tx=20program. Sy= mbol timing will be=20derived=20from the=20PC=20clock, = so=20with=20NTP available=20there's=20no=20need=20to=20involve=20GPS=20at=20= all.=20If=20Paul=20brought=20his=20LF=20receiver=20back=20to=20life,=20he=20coul= d=20probably=20copy=20you=20even if=20you=20reduced TX=20power=20to=20= 0.1=20Deccas.
=0D=0A=20=20=0D=0A
 
=0D=0A=20=20=0D=0A
How= =20many=20cats=20do=20you=20have?=20We=20want=20to=20know names,=20colours,= =20sex=20and=20age=20for=20all=20of=20them=20;-)
=0D=0A=20=20=0D=0A
&nb= sp;
=0D=0A=20=20=0D=0A
All=20the=20best,
=0D=0A=20=20=0D=0A
Ma= rkus=20(DF6NM)
=0D=0A=20=20=0D=0A
 
=0D=0A=20=20=0D=0A
&n= bsp;
=0D=0A=20=20=0D=0A
PS.=20SpecLab=20question:=20Wolf=20is=20there=20= a=20way=20to=20extract=20peak=20frequencies=20from=20past=20spectrogram=20lines=20= (semi-)automatically,=20without=20having=20to=20manually move and=20re= ad=20the=20mouse=20cursor=20over=20each=20point,=20e.g.=20something=20like=20a=20= peak_f(f1,f2,=20time)=20interpreter=20function?
=0D=0A=20
=0D=0A=20=20=0D= =0A
 
=0D=0A=20-----Urspr=C3=BCngliche=20Mitteilung-----=20
=0D= =0A=20Von:=20Markus=20Vester=20<mar= kusvester@aol.com>
=0D=0A=20An:=20rsgb_lf_group=20<rsgb_lf_group@blacksheep.org>
=0D=0A= =20Verschickt:=20Mi,=2011=20Nov=202015=201:24=20am
=0D=0A=20Betreff:=20LF:=20= VO1NA=20frequency
=0D=0A=20 =20=0D=0A=20=20=20=20=20=20=0D=0A=20=20=0D=0A
Hi=20Joe,
=0D=0A= =20=20=20=0D=0A
 
=0D=0A= =20=20=20=0D=0A
the=20attached=20plot=20= shows=20the=20=20frequency stability=20of your opds=20trace=20rec= eived=20last=20=20night http://df6nm.bplaced.net/LF/opds32_151110= _0736.png .=20=20Each=20data= =20point=20is=20the=20interpolated=20peak=20of=20a=20=20single=20438=20uHz=20FFT= =20(i.e.=2038=20minute=20window).=20The=20average=20frequency=20seems=20to=20be=20= =200.7=20mHz=20below nominal,=20and=20there=20are=20small=20temporal=20vari= ations up=20=20to 0.5=20mHz=20in=20either=20direction. Though=20s= ome=20of=20that is=20=20probably attributable to=20noise=20and=20= propagation,=20I=20believe=20that=20there=20=20is=20also=20a=20bit=20of=20inhere= nt=20instability=20in the=20frequency=20=20source. Actually=20a=20few=20= parts=20per=20billion is=20quite=20good=20for=20a=20free=20=20running = OCXO=20(assuming=20the=20"D"=20stands= =20for=20=20"double=20oven"=20and=20not=20"discipled"),=20and=20that=20the=20cal= ibration=20was=20done=20over=20a=2010=20=20MHz HF=20link.
=0D=0A= =20=20=20=0D=0A
 
=0D=0A= =20=20=20=0D=0A
Is=20this=20good=20enoug= h=20for=20EbNaut?=20During=20the=20=20experiments=20with=20IZ7SLZ=20we=20found=20= that=20for=20full=20sensitivity=20the=20phase=20variation=20=20over=20the=20EbNa= ut sequence=20duration=20should=20not=20be=20much=20more=20than=2090=C2=B0.= =20Thus=20=20for=20a=20half-hour=20message=20the=20frequency=20should=20be=20ide= ally=20constant=20and=20known=20to=20=20about=200.14=20mHz.=20If=20there=20is=20= more=20variation we often can=20still=20=20get decodes,=20bu= t=20we=20will=20have=20to=20find=20the=20best=20frequency=20offset=20by=20trial=20= =20and=20error,=20which=20can=20be=20cumbersome=20if=20the=20signal=20is=20weak.=
=0D=0A=20=20=20=0D=0A
 
=0D=0A=20=20=20=0D=0A
I=20= also=20fed=20opds=20data=20files=20from=20your=20Sat/Sun=20=20transmissions=20to= =20the=20EbNaut decoder.=20The=20idea=20was=20to=20see=20if your=20Ope= ra=20=20transmissions=20would=20actually=20produce the=20all-asterisk = decode=20which=20is=20=20expected=20for=20a=20non-PSK-keyed=20straight=20carrier= ,=20and=20to=20observe=20the=20symbol=20phase=20=20evolution=20over=20the=2038=20= minute=20duration. Starting=20mi= dnight=20UT,=20one=20decode=20was=20attempted=20every=2030=20minutes,=20=20using= =20a=20setting=20for=20464=20raw=20symbols=20(4=20characters) and=205=20sec= onds=20per=20=20symbol.=20A frequency=20offset=20of=20-0.6=20mHz=20was = ;selected to=20obtain=20=20flat=20phase=20during=20the=20first=20decodes,=20= and that=20offset was kept=20for=20=20all=20later=20attempts.=20<= /font>Despite=20the=20Opera=20gaps=20=20whic= h degrade=20or=20drop=20half=20of=20the=20available=20symbols, 12=20ou= t=20of=2013=20=20decode=20attempts&nb= sp;produced=20the=20=20correct "****"=20message, e.g.=20http://df6nm.bplaced.net/LF/r0317.png=20=20.=20However=20at=20times=20= the=20frequency=20drift=20was=20quite=20visible on=20the phase=20=20pl= ot, e.g.=20in=20http://df6nm.bplaced.net/LF/s0317.png (flat=20=20phase=20a= round=203:17)=20versus=20http://df6nm.bplaced.net/LF/s0347= .png (upward=20=20phase=20slope=20around=203:47). 
=0D= =0A=20=20=20=0D=0A
 
=0D= =0A=20=20=20=0D=0A
Scaling=20down=20to=20= VLF,=20deviations=20from=20the=20same=20=20oscillator=20will=20be=2016x=20smalle= r=20(~30=20uHz=20at=208.3=20kHz).=20This=20will=20be=20probably=20good=20=20enou= gh=20even=20for narrow=20FFT=20bins,=20corresponding=20to=20several=20hours= =20coherent=20=20carrier=20integration=20or=20slow=20EbNaut=20decodes.=0D=0A=20=20=20=0D=0A
 =0D=0A=20=20=20=0D=0A
All=20the=20be= st,
=0D=0A=20=20=20=0D=0A
Ma= rkus=20(DF6NM)
=0D=0A=20=20=20=0D=0A=20=20=0D=0A=

=0D=0A=20
=0D=0A=20=20=20=0D=0A=20=20=0D=0AFrom:=20jcraig@mun.ca=20
=0D=0A=20=20=20=0D=0A
Sent:=20Saturday,= =20November=2007,=202015=203:45=20PM
=0D=0A=20=20=20=0D=0A
To:=20= rsgb_lf_group@blacksheep.org=20=20
=0D=0A=20=20=20=0D=0ASubject:=20Re:=20LF:=20VO1NA=20opds-32
=0D=0A=20
=0D=0A=20=0D=0A=20=20=20=0D=0A

=0D=0A=20
=0D=0A=20LF=20Group,
=0D=0A=20=
=0D=0A=20Again,=20thanks=20to=20SV8RV=20DF2JP=20PA7EY=20and=20DF6NM=20for=20= =20the=20reports.
=0D=0A=20
=0D=0A=20In=20my=20last=20post=20I=20reported=20= the=20drift=20was=20constrained=20to=20=20within=201=20Hz.
=0D=0A=20This=20sh= ould=20be=201=20mHz. =20Thanks=20Markus=20for=20your=20assurances=20=20that= =20this
=0D=0A=20should=20be=20adequate=20for=20EbNaut=20which=20I=20hope=20t= o=20use=20to=20send=20send=20our=20=20
=0D=0A=20cat's=20name=20on=20LF. = =20The=20little=20curls=20appear=20often=20on=20the=20QRSS=20traces=20=20on
=0D= =0A=20your=20high=20res=20spectra. =20Doppler=20variations=20were=20removed= =20from=20the=2010=20=20MHz
=0D=0A=20WWV=20signals=20with=20harmonic=20regres= sion=20when=20the=20DOCXO=20was=20calibrated
=0D=0A=20so=20=20this=20effect=20= is=20seen=20on=20LF=20but=20not=20as=20strongly.
=0D=0A=20
=0D=0A=20After&= nbsp;=20reading=20about=20=20EbNaut=20on=20Paul=20Nicholson's=20pages=20it=20see= ms=20I=20have=20
=0D=0A=20much=20catching=20up=20=20ahead. =20Fasinating= =20stuff!
=0D=0A=20
=0D=0A=20Can=20the=20EbNaut=20phase=20inversions=20be=20= done=20=20without=20an=20absolute=20time=20
=0D=0A=20reference? =20I'm=20= cheap=20and=20lazy=20so=20hoping=20GPS=20=20will=20not=20be=20needed.
=0D=0A=20=
=0D=0A=20The=20Opera=20will=20be=20doing=20an=20encore=20tonight=20and=20if=20= the=20=20wind=20stays=20low
=0D=0A=20a=20tower=20climbing=20expedition=20is=20= planned=20for=20the=20=20afternoon.
=0D=0A=20
=0D=0A=2073
=0D=0A=20Joe=20= VO1NA
=0D=0A...
=0D=0A=20=20=0D=0A=20=20=0D=0A=20 ----------MB_8D2EB5632E22865_2188_AAFC2_webmail-vd012.sysops.aol.com-- ----------MB_8D2EB5632E22865_2188_AAFC1_webmail-vd012.sysops.aol.com Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="VO1NA_freq_ampl_151111-12.png" Content-Type: image/png; name="VO1NA_freq_ampl_151111-12.png" iVBORw0KGgoAAAANSUhEUgAAAj0AAAGKCAMAAADQaABjAAADAFBMVEUEAgTcnkx0npy8 3pwEAvx0SgRMntyc3twESkwESpwEAky8npx0Spycnty8/tycSky8/rwE/gQEdpxMAky8 /vy8vnR0vry8dkycnpzc3pycdgR0vtz8vpy8vtxMdpxMAnRMAgScnnQEdnScdpz8/tx0 SnT8/rz8/vycvvxMnryc3rycSgR0ntyc3vxMSpwEAnTcnpzc/tzc/rwEdrx0Akzc/vz8 vnS8dnScnrz83py8dgR0vvzcvrxMdrx0AnR0AgTcnnRMdnR0drycSnS8vvxpFgc/MwV1 dwD6AAeGAAA/AAB1AADbAACGAAA/XQB1AACkUAHt7gAYGAAAAAC0ANTtAO8YABgAAADk +KDt7hYYGDMAAHcgHgkApgMARQAAdQAMrHgAR1cOHB8AswJU/gAK/wBG/wB1/wCkUeTt bQAYP1QAdQAA6AAAbQAAP10AdQAAAOgAAO8AABgAAAACRBh/LIQAgZsAd3e0pjjtBwEY CV0AAAAAguAAAAAAAFQAAAAUAAHwAAAYAAAAAAAOAIWIADg/AJ91AHdUmHwKGolGrJR1 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