Return-Path: X-Spam-DCC: paranoid 1170; 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 tABHGCtA019072 for ; Wed, 11 Nov 2015 18:16:12 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1ZwYvg-0007Yo-UL for rs_out_1@blacksheep.org; Wed, 11 Nov 2015 17:11:28 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1ZwYvg-0007Yf-99 for rsgb_lf_group@blacksheep.org; Wed, 11 Nov 2015 17:11:28 +0000 Received: from omr-a017e.mx.aol.com ([204.29.186.68]) by relay1.thorcom.net with esmtps (TLSv1:DHE-RSA-AES256-SHA:256) (Exim 4.86) (envelope-from ) id 1ZwYub-0001lQ-Gi for rsgb_lf_group@blacksheep.org; Wed, 11 Nov 2015 17:11:27 +0000 Received: from mtaomg-aan01.mx.aol.com (mtaomg-aan01.mx.aol.com [172.27.19.79]) by omr-a017e.mx.aol.com (Outbound Mail Relay) with ESMTP id B38B23800083 for ; Wed, 11 Nov 2015 12:10:03 -0500 (EST) Received: from core-afa10d.mail.aol.com (core-afa10.mail.aol.com [172.27.24.10]) by mtaomg-aan01.mx.aol.com (OMAG/Core Interface) with ESMTP id 2D7FE38000082 for ; Wed, 11 Nov 2015 12:10:03 -0500 (EST) References: To: rsgb_lf_group@blacksheep.org In-Reply-To: X-MB-Message-Source: WebUI MIME-Version: 1.0 From: Markus Vester X-MB-Message-Type: User X-Mailer: AOL Webmail BASIC Received: from 192.35.17.12 by webmail-vd017.sysops.aol.com (205.188.21.128) with HTTP (WebMailUI); Wed, 11 Nov 2015 12:10:02 -0500 Message-Id: <8D2EABAF0379B74-9084-3D874@webmail-vd017.sysops.aol.com> X-Originating-IP: [192.35.17.12] Date: Wed, 11 Nov 2015 12:10:02 -0500 x-aol-global-disposition: G X-AOL-VSS-INFO: 5700.7163/106875 X-AOL-VSS-CODE: clean DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mx.aol.com; s=20150623; t=1447261803; bh=JrqJ2nb+r45OdJPLWBI9nnvDBCj6uBakluz9m8li5lc=; h=From:To:Subject:Message-Id:Date:MIME-Version:Content-Type; b=zTMHTwqhUa1cYH2TVhLdgDOtev5kTJ44OfT65tUpznPPOiZrviogsbjueWXA0pPLa L5YWRW1afFJsFRxVdRe76E0ZbRF3IXxKoodSaehq7KiRYuP0PN2w17/7siD69mmXG9 A3ufo2x0S4EpYXopUpKYcdguEN1ibGFUV8oD0UQI= x-aol-sid: 3039ac1b134f5643766b510f X-Scan-Signature: 956413284a34c748fa4125c5c7fa4843 Subject: Re: LF: VO1NA frequency Content-Type: multipart/mixed; boundary="--------MB_8D2EABAF04D07CB_9084_8677B_webmail-vd017.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: 4973 This is a multi-part message in MIME format. ----------MB_8D2EABAF04D07CB_9084_8677B_webmail-vd017.sysops.aol.com Content-Type: multipart/alternative; boundary="--------MB_8D2EABAF04D07CB_9084_8677C_webmail-vd017.sysops.aol.com" ----------MB_8D2EABAF04D07CB_9084_8677C_webmail-vd017.sysops.aol.com Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" =20Joe,=20=0D=0A=C2=A0=0D=0Amore=20of=20the=20same=20from=20last=20night,=20this= =20time=20with=C2=A0frequency=20and=20level=20plots.=20Again=20we=20see=20some=20= frequency=20variation=20of=20similar=20size=20as=20yesterday.=20It=20is=20not=20= clear=20how=20much=20of=20that=20is=20due=20to=20propagation,=C2=A0I=20only=20th= ink=20that=20the=C2=A0rise=C2=A0near=20the=20end=20is=20due=20to=20Doppler=C2=A0= from=20the=C2=A0descent=20of=20the=20ionosphere=20at=20sunrise.=C2=A0Russian=C2=A0= Loran=20lines=20on=20137475=20and=20137482.5=20seemed=20to=20have=20less=20overn= ight=20variation=20(~=200.1=20mHz),=20but=20then=20of=20course=20the=20intra-Eur= opean=20path=20from=20Slonim=20is=20very=20different=20from=20yours.=C2=A0=0D=0A= =C2=A0=0D=0ARegarding=20EbNaut=20carrier=20analysis:=C2=A0for=20some=20reason=20= (lack=20of=20coffee?),=20I=20only=20saw=20Domenico's=20earlier=20mail=20after=20= I=20had=C2=A0sent=20mine,=20so=20please=20excuse=20me=20for=20basically=20having= =20described=C2=A0the=20same=20procedure=20again.=C2=A0Anyway=20it's=20good=20th= at=20we=C2=A0both=C2=A0arrived=20at=20the=20same=20conclusion:=C2=A0If=20Joe=20s= tarted=20sending=C2=A0EbNaut=20PSK=20with=20his=C2=A0oscillator=20as=C2=A0it=20i= s=20now,=20we=20would=20very=20likely=20be=20able=20to=20decode=20it=20here.=C2=A0= =0D=0A=C2=A0=0D=0AJoe=20so=20all=20you=20need=20now=20is=20a=20diode=20ring-mixe= r=20for=20PSK=20modulation=20and=20Paul's=20ebnaut-tx=20program.=C2=A0Symbol=C2=A0= timing=C2=A0will=C2=A0be=20derived=20from=C2=A0the=20PC=20clock,=C2=A0so=20with=20= NTP=C2=A0available=20there's=20no=20need=20to=20involve=20GPS=20at=20all.=20If=20= Paul=20brought=20his=20LF=20receiver=20back=20to=20life,=20he=20could=20probably= =20copy=20you=20even=C2=A0if=20you=20reduced=C2=A0TX=20power=20to=200.1=20Deccas= .=0D=0A=C2=A0=0D=0AHow=20many=20cats=20do=20you=20have?=20We=20want=20to=20know=C2= =A0names,=20colours,=20sex=20and=20age=20for=20all=20of=20them=20;-)=0D=0A=C2=A0= =0D=0AAll=20the=20best,=0D=0AMarkus=20(DF6NM)=0D=0A=C2=A0=0D=0A=C2=A0=0D=0APS.=20= SpecLab=20question:=20Wolf=20is=20there=20a=20way=20to=20extract=20peak=20freque= ncies=20from=20past=20spectrogram=20lines=20(semi-)automatically,=20without=20ha= ving=20to=20manually=C2=A0move=C2=A0and=20read=20the=20mouse=20cursor=20over=20e= ach=20point,=20e.g.=20something=20like=20a=20peak_f(f1,f2,=20time)=20interpreter= =20function?=0D=0A=0D=0A=C2=A0=0D=0A-----Urspr=C3=BCngliche=20Mitteilung-----=20= =0D=0AVon:=20Markus=20Vester=20<markusvester@aol.com>=0D=0AAn:=20rsgb_lf_g= roup=20<rsgb_lf_group@blacksheep.org>=0D=0AVerschickt:=20Mi,=2011=20Nov=20= 2015=201:24=20am=0D=0ABetreff:=20LF:=20VO1NA=20frequency=0D=0A=C2=A0=20=20=20=20= =20=20Hi=20Joe,=0D=0A=20=C2=A0=0D=0A=20the=20attached=20plot=20shows=20the=20=20= frequency=C2=A0stability=20of=C2=A0your=C2=A0opds=20trace=20received=20last=20=20= night=C2=A0http://df6nm.bplaced.net/LF/opds32_151110_0736.png=C2=A0.=20=20Each=20= data=20point=20is=20the=20interpolated=20peak=20of=20a=20=20single=20438=20uHz=20= FFT=20(i.e.=2038=20minute=20window).=20The=20average=20frequency=20seems=20to=20= be=20=200.7=20mHz=20below=C2=A0nominal,=20and=20there=20are=20small=20temporal=20= variations=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=20an= d=20propagation,=20I=20believe=20that=20there=20=20is=20also=20a=20bit=20of=20in= herent=20instability=20in=C2=A0the=20frequency=20=20source.=C2=A0Actually=20a=20= few=20parts=20per=20billion=C2=A0is=20quite=20good=20for=20a=20free=20=20running= =C2=A0OCXO=20(assuming=20the=20"D"=20stands=20for=20=20"double=20oven"=20and=20n= ot=20"discipled"),=20and=20that=20the=20calibration=20was=20done=20over=20a=2010= =20=20MHz=C2=A0HF=20link.=0D=0A=20=C2=A0=0D=0A=20Is=20this=20good=20enough=20for= =20EbNaut?=20During=20the=20=20experiments=20with=20IZ7SLZ=20we=20found=20that=20= for=20full=20sensitivity=20the=20phase=20variation=20=20over=20the=20EbNaut=C2=A0= sequence=20duration=20should=20not=20be=20much=20more=20than=2090=C2=B0.=20Thus=20= =20for=20a=20half-hour=20message=20the=20frequency=20should=20be=20ideally=20con= stant=20and=20known=20to=20=20about=200.14=20mHz.=20If=20there=20is=20more=20var= iation=C2=A0we=C2=A0often=C2=A0can=20still=20=20get=C2=A0decodes,=20but=20we=20w= ill=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= =C2=A0=0D=0A=20I=20also=20fed=20opds=20data=20files=20from=20your=20Sat/Sun=20=20= transmissions=20to=20the=20EbNaut=C2=A0decoder.=20The=20idea=20was=20to=20see=20= if=C2=A0your=20Opera=20=20transmissions=20would=20actually=20produce=C2=A0the=20= all-asterisk=C2=A0decode=20which=20is=20=20expected=20for=20a=20non-PSK-keyed=20= straight=20carrier,=20and=20to=20observe=20the=20symbol=20phase=20=20evolution=20= over=20the=2038=20minute=20duration.=C2=A0Starting=20midnight=20UT,=20one=20deco= de=20was=20attempted=20every=2030=20minutes,=20=20using=20a=20setting=20for=2046= 4=20raw=20symbols=20(4=20characters)=C2=A0and=205=20seconds=20per=20=20symbol.=20= A=C2=A0frequency=20offset=20of=20-0.6=20mHz=20was=C2=A0selected=C2=A0to=20obtain= =20=20flat=20phase=20during=20the=20first=20decodes,=20and=C2=A0that=20offset=C2= =A0was=C2=A0kept=20for=20=20all=20later=20attempts.=20Despite=20the=20Opera=20ga= ps=20=20which=C2=A0degrade=20or=20drop=20half=20of=20the=20available=20symbols,=C2= =A012=20out=20of=2013=20=20decode=20attempts=C2=A0produced=20the=20=20correct=C2= =A0"****"=20message,=C2=A0e.g.=20http://df6nm.bplaced.net/LF/r0317.png=20=20.=20= However=20at=20times=20the=20frequency=20drift=20was=20quite=20visible=C2=A0on=20= the=C2=A0phase=20=20plot,=C2=A0e.g.=20in=20http://df6nm.bplaced.net/LF/s0317.png= =C2=A0(flat=20=20phase=20around=203:17)=20versus=20http://df6nm.bplaced.net/LF/s= 0347.png=C2=A0(upward=20=20phase=20slope=20around=203:47).=C2=A0=0D=0A=20=C2=A0=0D= =0A=20Scaling=20down=20to=20VLF,=20deviations=20from=20the=20same=20=20oscillato= r=20will=20be=2016x=20smaller=20(~30=20uHz=20at=208.3=20kHz).=20This=20will=20be= =20probably=20good=20=20enough=20even=20for=C2=A0narrow=20FFT=20bins,=20correspo= nding=20to=20several=20hours=20coherent=20=20carrier=20integration=20or=20slow=20= EbNaut=20decodes.=0D=0A=20=C2=A0=0D=0A=20All=20the=20best,=0D=0A=20Markus=20(DF6= NM)=0D=0A=20=20=0D=0A=0D=0A=20=20From:=20jcraig@mun.ca=20=0D=0A=20Sent:=20Saturd= ay,=20November=2007,=202015=203:45=20PM=0D=0A=20To:=20rsgb_lf_group@blacksheep.o= rg=20=20=0D=0A=20Subject:=20Re:=20LF:=20VO1NA=20opds-32=0D=0A=0D=0A=0D=0A=20=0D=0A= =0D=0ALF=20Group,=0D=0A=0D=0AAgain,=20thanks=20to=20SV8RV=20DF2JP=20PA7EY=20and=20= DF6NM=20for=20=20the=20reports.=0D=0A=0D=0AIn=20my=20last=20post=20I=20reported=20= the=20drift=20was=20constrained=20to=20=20within=201=20Hz.=0D=0AThis=20should=20= be=201=20mHz.=C2=A0=20Thanks=20Markus=20for=20your=20assurances=20=20that=20this= =0D=0Ashould=20be=20adequate=20for=20EbNaut=20which=20I=20hope=20to=20use=20to=20= send=20send=20our=20=20=0D=0Acat's=20name=20on=20LF.=C2=A0=20The=20little=20curl= s=20appear=20often=20on=20the=20QRSS=20traces=20=20on=0D=0Ayour=20high=20res=20s= pectra.=C2=A0=20Doppler=20variations=20were=20removed=20from=20the=2010=20=20MHz= =0D=0AWWV=20signals=20with=20harmonic=20regression=20when=20the=20DOCXO=20was=20= calibrated=0D=0Aso=20=20this=20effect=20is=20seen=20on=20LF=20but=20not=20as=20s= trongly.=0D=0A=0D=0AAfter=C2=A0=20reading=20about=20=20EbNaut=20on=20Paul=20Nich= olson's=20pages=20it=20seems=20I=20have=20=0D=0Amuch=20catching=20up=20=20ahead.= =C2=A0=20Fasinating=20stuff!=0D=0A=0D=0ACan=20the=20EbNaut=20phase=20inversions=20= be=20done=20=20without=20an=20absolute=20time=20=0D=0Areference?=C2=A0=20I'm=20c= heap=20and=20lazy=20so=20hoping=20GPS=20=20will=20not=20be=20needed.=0D=0A=0D=0A= The=20Opera=20will=20be=20doing=20an=20encore=20tonight=20and=20if=20the=20=20wi= nd=20stays=20low=0D=0Aa=20tower=20climbing=20expedition=20is=20planned=20for=20t= he=20=20afternoon.=0D=0A=0D=0A73=0D=0AJoe=20VO1NA=0D=0A=0D=0A=0D=0AOn=20Sat,=207= =20Nov=202015,=20Markus=20Vester=20=20wrote:=0D=0A=0D=0A>=20Hi=20Joe,=20LF,=0D= =0A>=0D=0A>=20during=20the=20last=20couple=20of=20nights,=20=20opds=20dete= cted=20all=20of=20your=20transmissions=20between=20about=2022=C2=A0=20and=207:30= =20=20UT.=0D=0A>=0D=0A>=20Attached=20is=20a=20zoomed=2040=20mHz=20section=20= from=20my=20opds-32=20=20spectrogram,=20showing=20your=20central=20coherent=20ca= rrier=20which=20contains=20half=20of=20the=20=20transmitted=20average=20power.=20= It=20seems=20to=20be=20about=200.5=20mHz=20below=20137477=20Hz=20=20(possibly=20= due=20to=20a=20calibration=20error=20in=20my=20receiver).=20The=202.7=20mHz=20sp= aced=20=20sidelines=20during=20the=20early=20part=20(bottom)=20were=20caused=20b= y=206-minute-periodic=20=20interruptions=20from=20my=20own=20MF=20WSPR=20transmi= ssions.=20However=20the=20little=20curls=20near=20=20the=20carrier=20can=20presu= mably=20be=20attributed=20to=20Doppler-shifted=20multipath=20=20components.=20Th= e=20carrier=20was=20still=20weakly=20visible=20for=20another=20hour=20after=20th= e=20last=20=20detection.=0D=0A>=0D=0A>=20Comparing=20the=20looks=20of=20th= e=20carrier=20to=20earlier=20IZ7SLZ=20=20transmissions,=20the=20stability=20of=20= the=20signal=20and=20the=20path=20seems=20quite=20sufficient=20=20for=20half-hou= r=20EbNaut=20PSK=20transmissions.=20Unfortunately=20I=20missed=20the=20opportuni= ty=20=20to=20save=20the=20raw=20data=20and=20analyze=20phase=20evolution=20using= =20the=20EbNaut=20decoder=20itself=20=20-=20will=20try=20that=20next=20time.=0D=0A= >=0D=0A>=20All=20the=20best,=0D=0A>=20Markus=20=20(DF6NM)=0D=0A>=0D=0A= >=0D=0A>=0D=0A>=0D=0A>=20From:=20jcraig@mun.ca=0D=0A>=20Sent:=20S= aturday,=20November=20=2007,=202015=2012:03=20AM=0D=0A>=20To:=20rsgb_lf_group= @blacksheep.org=0D=0A>=20=20Subject:=20Re:=20LF:=20last=20night=20opera=20opd= s=20detection=20in=20=20km07ks=0D=0A>=0D=0A>=0D=0A>=20LF=20Group,=0D=0A= >=0D=0A>=0D=0A>=20I=20am=20grateful=20=20to=20Joe=20DF2JP=20for=20his=20= captures=20QRSS=20and=20Opera=0D=0A>=20Dionysious=20SV8RV=20for=20his=20OP=20= =20decodes=20to=20Domenico=20IZ7SLZ=0D=0A>=20for=20his=20OPDS=20decodes,=20an= d=20thanks=20to=20DF6NM=20for=20=20opds!=0D=0A>=0D=0A>=20I=20do=20not=20kn= ow=20if=20my=20DOCXO=20is=20stable=20enough=20for=20=20EbNaut.=0D=0A>=20It=20= was=20set=20a=20couple=20of=20years=20ago=20and=20has=20not=20drifted=20more=20=20= than=0D=0A>=201=20Hz=20since=20then.=C2=A0=20It=20seems=20the=20phase=20decoh= erence=20has=20=20stopped=0D=0A>=20haunting=20me.=0D=0A>=0D=0A>=20I=20a= m=20hoping=20to=20replace=20the=20halyard=20=20for=20the=20other=20100m=20wire=20= soon.=0D=0A>=0D=0A>=20OP32=20again=20tonight=20as=20send=20this=20=20email= .=0D=0A>=0D=0A>=2073=0D=0A>=20Joe=0D=0A>=0D=0A>=0D=0A=0D=0A=20=20= =0D=0A=20=0A=0A ----------MB_8D2EABAF04D07CB_9084_8677C_webmail-vd017.sysops.aol.com Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset="utf-8" =0D=0A=0D=0A=0D=0A
=20Joe,= =20
=0D=0A=0D=0A
 
=0D=0A=0D=0A
more=20of=20the=20same=20= from=20last=20night,=20this=20time=20with frequency=20and=20level=20plots.=20= Again=20we=20see=20some=20frequency=20variation=20of=20similar=20size=20as=20yes= terday.=20It=20is=20not=20clear=20how=20much=20of=20that=20is=20due=20to=20propa= gation, I=20only=20think=20that=20the rise near=20the=20end=20is=20= due=20to=20Doppler from=20the descent=20of=20the=20ionosphere=20at=20s= unrise. Russian Loran=20lines=20on=20137475=20and=20137482.5=20seemed=20= to=20have=20less=20overnight=20variation=20(~=200.1=20mHz),=20but=20then=20of=20= course=20the=20intra-European=20path=20from=20Slonim=20is=20very=20different=20f= rom=20yours. 
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=0D=0A=0D=0A
Regarding=20= EbNaut=20carrier=20analysis: for=20some=20reason=20(lack=20of=20coffee?),=20= I=20only=20saw=20Domenico's=20earlier=20mail=20after=20I=20had sent=20mine,= =20so=20please=20excuse=20me=20for=20basically=20having=20described the=20s= ame=20procedure=20again. Anyway=20it's=20good=20that=20we both ar= rived=20at=20the=20same=20conclusion: If=20Joe=20started=20sending EbN= aut=20PSK=20with=20his oscillator=20as it=20is=20now,=20we=20would=20v= ery=20likely=20be=20able=20to=20decode=20it=20here. 
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Joe=20so=20all=20you=20need=20now=20is=20a=20diode=20= ring-mixer=20for=20PSK=20modulation=20and=20Paul's=20ebnaut-tx=20program. S= ymbol 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.
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=0D=0A=0D=0A
How=20many=20ca= ts=20do=20you=20have?=20We=20want=20to=20know names,=20colours,=20sex=20and= =20age=20for=20all=20of=20them=20;-)
=0D=0A=0D=0A
 
=0D=0A=0D= =0A
All=20the=20best,
=0D=0A=0D=0A
Markus=20(DF6NM)
=0D=0A=0D=0A=
 
=0D=0A=0D=0A
 
=0D=0A=0D=0A
PS.=20SpecLab=20q= uestion:=20Wolf=20is=20there=20a=20way=20to=20extract=20peak=20frequencies=20fro= m=20past=20spectrogram=20lines=20(semi-)automatically,=20without=20having=20to=20= manually move and=20read=20the=20mouse=20cursor=20over=20each=20point,= =20e.g.=20something=20like=20a=20peak_f(f1,f2,=20time)=20interpreter=20function?=
=0D=0A
=0D=0A=0D=0A
 
=0D=0A-----Urspr=C3=BCngliche=20Mit= teilung-----=20
=0D=0AVon:=20Markus=20Vester=20<markusvester@aol.com>=0D=0AAn:=20rsgb_lf_group=20<rsgb_lf_group@blacksheep.org>
=0D=0AVers= chickt:=20Mi,=2011=20Nov=202015=201:24=20am
=0D=0ABetreff:=20LF:=20VO1NA=20fr= equency
=0D=0A =0D=0A=20=20=20=20=20=0D=0A=20=0D=0A
Hi=20Joe,
=0D=0A=20=0D=0A
 
=0D=0A=20=0D=0A
t= he=20attached=20plot=20shows=20the=20=20frequency stability=20of your&= nbsp;opds=20trace=20received=20last=20=20night http://df6nm.bplace= d.net/LF/opds32_151110_0736.png .=20=20Each=20data=20point=20is=20the=20interpolated=20peak=20of=20a=20=20si= ngle=20438=20uHz=20FFT=20(i.e.=2038=20minute=20window).=20The=20average=20freque= ncy=20seems=20to=20be=20=200.7=20mHz=20below nominal,=20and=20there=20are=20= small=20temporal=20variations up=20=20to 0.5=20mHz=20in=20either=20dir= ection. Though=20some=20of=20that is=20=20probably attributable&n= bsp;to=20noise=20and=20propagation,=20I=20believe=20that=20there=20=20is=20also=20= a=20bit=20of=20inherent=20instability=20in the=20frequency=20=20source.&nbs= p;Actually=20a=20few=20parts=20per=20billion is=20quite=20good=20for=20a=20= free=20=20running OCXO=20(assuming=20the=20"D"=20stands=20for=20=20"double=20oven"=20and=20not=20"discipled"),=20= and=20that=20the=20calibration=20was=20done=20over=20a=2010=20=20MHz HF=20l= ink.
=0D=0A=20=0D=0A
=  
=0D=0A=20=0D=0A
Is=20this=20= good=20enough=20for=20EbNaut?=20During=20the=20=20experiments=20with=20IZ7SLZ=20= we=20found=20that=20for=20full=20sensitivity=20the=20phase=20variation=20=20over= =20the=20EbNaut sequence=20duration=20should=20not=20be=20much=20more=20tha= n=2090=C2=B0.=20Thus=20=20for=20a=20half-hour=20message=20the=20frequency=20shou= ld=20be=20ideally=20constant=20and=20known=20to=20=20about=200.14=20mHz.=20If=20= there=20is=20more=20variation we often can=20still=20=20get = decodes,=20but=20we=20will=20have=20to=20find=20the=20best=20frequency=20offset=20= by=20trial=20=20and=20error,=20which=20can=20be=20cumbersome=20if=20the=20signal= =20is=20weak.
=0D=0A=20=0D=0A
 
=0D=0A=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=0D=0A
 
=0D=0A=20= =0D=0A
Scaling=20down=20to=20VLF,=20devi= ations=20from=20the=20same=20=20oscillator=20will=20be=2016x=20smaller=20(~30=20= uHz=20at=208.3=20kHz).=20This=20will=20be=20probably=20good=20=20enough=20even=20= for narrow=20FFT=20bins,=20corresponding=20to=20several=20hours=20coherent=20= =20carrier=20integration=20or=20slow=20EbNaut=20decodes.
=0D=0A=20=0D= =0A
 
=0D=0A=20=0D=0AAll=20the=20best,=0D=0A=20=0D= =0A
Markus=20(DF6NM)
=0D=0A=20= =0D=0A=20=0D=0A
<= font=20face=3D"Arial">
=0D=0A
=0D=0A= =20=0D=0A=20=0D=0AFrom:=20jcraig@mun.ca=20=0D=0A=20=0D=0A
Sent= :=20Saturday,=20November=2007,=202015=203:45=20PM
=0D=0A=20=0D=0A
<= b>To:=20rsgb_lf_group@blacksheep.org=20=20
=0D=0A=20=0D=0A=
Subject:=20Re:=20LF:=20VO1NA=20opds-32
=0D=0A=0D=0A= =0D=0A=20=0D=0A

=0D=0A
=0D=0ALF=20Group,
=0D=0A
=0D=0AAgain,=20= thanks=20to=20SV8RV=20DF2JP=20PA7EY=20and=20DF6NM=20for=20=20the=20reports.
=0D= =0A
=0D=0AIn=20my=20last=20post=20I=20reported=20the=20drift=20was=20constrai= ned=20to=20=20within=201=20Hz.
=0D=0AThis=20should=20be=201=20mHz. =20Th= anks=20Markus=20for=20your=20assurances=20=20that=20this
=0D=0Ashould=20be=20= adequate=20for=20EbNaut=20which=20I=20hope=20to=20use=20to=20send=20send=20our=20= =20
=0D=0Acat's=20name=20on=20LF. =20The=20little=20curls=20appear=20oft= en=20on=20the=20QRSS=20traces=20=20on
=0D=0Ayour=20high=20res=20spectra. = ;=20Doppler=20variations=20were=20removed=20from=20the=2010=20=20MHz
=0D=0AWW= V=20signals=20with=20harmonic=20regression=20when=20the=20DOCXO=20was=20calibrat= ed
=0D=0Aso=20=20this=20effect=20is=20seen=20on=20LF=20but=20not=20as=20stron= gly.
=0D=0A
=0D=0AAfter =20reading=20about=20=20EbNaut=20on=20Paul=20= Nicholson's=20pages=20it=20seems=20I=20have=20
=0D=0Amuch=20catching=20up=20=20= ahead. =20Fasinating=20stuff!
=0D=0A
=0D=0ACan=20the=20EbNaut=20phase= =20inversions=20be=20done=20=20without=20an=20absolute=20time=20
=0D=0Arefere= nce? =20I'm=20cheap=20and=20lazy=20so=20hoping=20GPS=20=20will=20not=20be=20= needed.
=0D=0A
=0D=0AThe=20Opera=20will=20be=20doing=20an=20encore=20tonig= ht=20and=20if=20the=20=20wind=20stays=20low
=0D=0Aa=20tower=20climbing=20expe= dition=20is=20planned=20for=20the=20=20afternoon.
=0D=0A
=0D=0A73
=0D=0A= Joe=20VO1NA
=0D=0A
=0D=0A
=0D=0AOn=20Sat,=207=20Nov=202015,=20Markus=20= Vester=20=20wrote:
=0D=0A
=0D=0A>=20Hi=20Joe,=20LF,
=0D=0A>
=0D= =0A>=20during=20the=20last=20couple=20of=20nights,=20=20opds=20detected=20all= =20of=20your=20transmissions=20between=20about=2022 =20and=207:30=20=20UT.<= br>=0D=0A>
=0D=0A>=20Attached=20is=20a=20zoomed=2040=20mHz=20section=20= from=20my=20opds-32=20=20spectrogram,=20showing=20your=20central=20coherent=20ca= rrier=20which=20contains=20half=20of=20the=20=20transmitted=20average=20power.=20= It=20seems=20to=20be=20about=200.5=20mHz=20below=20137477=20Hz=20=20(possibly=20= due=20to=20a=20calibration=20error=20in=20my=20receiver).=20The=202.7=20mHz=20sp= aced=20=20sidelines=20during=20the=20early=20part=20(bottom)=20were=20caused=20b= y=206-minute-periodic=20=20interruptions=20from=20my=20own=20MF=20WSPR=20transmi= ssions.=20However=20the=20little=20curls=20near=20=20the=20carrier=20can=20presu= mably=20be=20attributed=20to=20Doppler-shifted=20multipath=20=20components.=20Th= e=20carrier=20was=20still=20weakly=20visible=20for=20another=20hour=20after=20th= e=20last=20=20detection.
=0D=0A>
=0D=0A>=20Comparing=20the=20looks=20= of=20the=20carrier=20to=20earlier=20IZ7SLZ=20=20transmissions,=20the=20stability= =20of=20the=20signal=20and=20the=20path=20seems=20quite=20sufficient=20=20for=20= half-hour=20EbNaut=20PSK=20transmissions.=20Unfortunately=20I=20missed=20the=20o= pportunity=20=20to=20save=20the=20raw=20data=20and=20analyze=20phase=20evolution= =20using=20the=20EbNaut=20decoder=20itself=20=20-=20will=20try=20that=20next=20t= ime.
=0D=0A>
=0D=0A>=20All=20the=20best,
=0D=0A>=20Markus=20=20= (DF6NM)
=0D=0A>
=0D=0A>
=0D=0A>
=0D=0A>
=0D=0A>=20= From:=20jcraig@mun.ca
=0D=0A>=20Sen= t:=20Saturday,=20November=20=2007,=202015=2012:03=20AM
=0D=0A>=20To:=20rsgb_lf_group@blacksheep.org=0D=0A>=20=20Subject:=20Re:=20LF:=20last=20night=20opera=20opds=20detection=20= in=20=20km07ks
=0D=0A>
=0D=0A>
=0D=0A>=20LF=20Group,
=0D=0A= >
=0D=0A>
=0D=0A>=20I=20am=20grateful=20=20to=20Joe=20DF2JP=20for= =20his=20captures=20QRSS=20and=20Opera
=0D=0A>=20Dionysious=20SV8RV=20for=20= his=20OP=20=20decodes=20to=20Domenico=20IZ7SLZ
=0D=0A>=20for=20his=20OPDS=20= decodes,=20and=20thanks=20to=20DF6NM=20for=20=20opds!
=0D=0A>
=0D=0A>= ;=20I=20do=20not=20know=20if=20my=20DOCXO=20is=20stable=20enough=20for=20=20EbNa= ut.
=0D=0A>=20It=20was=20set=20a=20couple=20of=20years=20ago=20and=20has=20= not=20drifted=20more=20=20than
=0D=0A>=201=20Hz=20since=20then. =20It= =20seems=20the=20phase=20decoherence=20has=20=20stopped
=0D=0A>=20haunting= =20me.
=0D=0A>
=0D=0A>=20I=20am=20hoping=20to=20replace=20the=20haly= ard=20=20for=20the=20other=20100m=20wire=20soon.
=0D=0A>
=0D=0A>=20O= P32=20again=20tonight=20as=20send=20this=20=20email.
=0D=0A>
=0D=0A>= =2073
=0D=0A>=20Joe
=0D=0A>
=0D=0A>
=0D=0A
=0D=0A=20=20<= /div>=0D=0A=20=0D=0A ----------MB_8D2EABAF04D07CB_9084_8677C_webmail-vd017.sysops.aol.com-- ----------MB_8D2EABAF04D07CB_9084_8677B_webmail-vd017.sysops.aol.com Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="VO1NA_freq_ampl_151110-11.png" Content-Type: image/png; name="VO1NA_freq_ampl_151110-11.png" iVBORw0KGgoAAAANSUhEUgAAAj0AAAF6CAMAAADF+hl6AAADAFBMVEUEAgTcnkx0npy8 3pwEAvx0SgRMntyc3twESkwESpwEAky8npy8/tx0SpycntycSky8/rwE/gQEdpxMAky8 /vy8vnR0vry8dkycnpzc3pycdgR0vtz8vpy8vtxMdpxMAnRMAgScnnT83twEdnT8/tyc dpx0SnT8/rz8/vycvvxMnryc3rycSgR0ntyc3vxMSpwEAnTcnpzc/tzc/rwEdrx0Akzc /vz8vnS8dnScnrz83py8dgR0vvzcvrxMdrx0AnR0AgTcnnRMdnR0drycSnS8vvx8D8J2 dQD6AAeGAAB8AAB2AADbAACGAAB8aQB2AACkUAHt7gAYGAAAAAC0ANTtAO8YABgAAADk +KDt7hYYGA8AAHUgHgkApgMAggAAdgAMVfgAo+sOW14A4gJU/gAK/wCD/wB2/wCkUUzt bQAYfFQAdgAA6AAAbQAAfGkAdgAAAOgAAO8AABgAAAACRBh/LIQA1O4Adna0RjjtCwEY mWkAAAAAgkgAAAAAAFQAAAAUAAHwAAAYAAAAAAAOAIWIADh8APJ2AHZU6PIK2ISDvyt2 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