Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by klubnl.pl (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id w16E5dSE019141 for ; Tue, 6 Feb 2018 15:05:42 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1ej3ki-0008DO-85 for rs_out_1@blacksheep.org; Tue, 06 Feb 2018 13:57:40 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1ej3kg-0008DF-3B for rsgb_lf_group@blacksheep.org; Tue, 06 Feb 2018 13:57:38 +0000 Received: from mail-qk0-x231.google.com ([2607:f8b0:400d:c09::231]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1ej3kb-0006So-1c for rsgb_lf_group@blacksheep.org; Tue, 06 Feb 2018 13:57:36 +0000 Received: by mail-qk0-x231.google.com with SMTP id d18so2340860qke.7 for ; Tue, 06 Feb 2018 05:57:32 -0800 (PST) X-DKIM-Result: Domain=gmail.com Result=Good and Known Domain DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to; bh=vHQ4hkKPnBrITJUx4n8nipullLfYx2cIO6E4w+eKcis=; b=ntKaQr264VWM8aDZgBAWZhfMEa/tRCs9pfETke45Vxn/mf0yV3M8nH23WtBl0Vi4nL VO5kM9r51r76rTIIW8yHcwDrQgbm0e6y60aKj0tP99QmgbiF0vEhD6jZEwaah9AUqIt2 RwuFI/iMJlTE4Db3xpjfocnon3TyfOX/xUC0ET9dBGKTwtrdR+xcIpyN4M2OYzDAIgBP GyiJMVXunI54HewFVHDVwRIQ65igR3lCkytfRIYkRZPLK1sLMqYURGiJUYlVLYqdI441 WwxxSx0bIEdyiioqfwCsCtxrMtjF3MsjJJi7Mbdt100DGNOS2Yu9oxpJncneatE4za2S ACqA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to; bh=vHQ4hkKPnBrITJUx4n8nipullLfYx2cIO6E4w+eKcis=; b=IV3SyUkrYWfm5KpOyGQXSCr44ZOvzcBEAtZ1xHZPesWnMSXnGyA8rUG1rqVNRyR/7T e+Zpa5nu8wwlicTnLhRaBeT2V4k5/M5p6+9A6vIg6IvgpzDSMThxG/QlVtI8ur9tRooy FbyRfS+tc8fmYW5IzCDFAAJYXQ3OUWgKlPzv7ReHxLiHwapkuDP9x4o48CUBjMPWc0nj 2U2IYWnPhBBNmFmogKRtcMkYYD08XBUyMQGL3P5aor7uGSBQt57CqIRJkpe3O7kGXtb8 hRM0P+D090XmVhvsaibAyEWY+NcigagAa3MEnh+ND+9s1AMvVfVzidGA8UWjfSapUs2t YpgA== X-Gm-Message-State: APf1xPAChVm1r7EK9B08z+yzkZTkPAe1tUpgkSOKthbfi6SMFHCOCdDY Feg5mWE/fl9CLrB7rRQVMWTlLlb9I1u8pCI1/Bg= X-Google-Smtp-Source: AH8x226fcVx/K9g7G4+b3U8TT9thn4Fp5MELP0/es3FkSaWWo6mgCuui7LljJQWzeG2XrYsTdoUUO8++Jr645ewQf04= X-Received: by 10.55.20.210 with SMTP id 79mr3335077qku.66.1517925451264; Tue, 06 Feb 2018 05:57:31 -0800 (PST) MIME-Version: 1.0 Received: by 10.12.175.109 with HTTP; Tue, 6 Feb 2018 05:57:30 -0800 (PST) In-Reply-To: <049801d39f14$26d39880$747ac980$@comcast.net> References: <07558728-336b-cb7c-bc04-4d7718f5b97c@df3lp.de> <1960259.EQv1FmN41F@x220> <037701d2ddbc$89dbcfc0$9d936f40$@comcast.net> <049801d39f14$26d39880$747ac980$@comcast.net> From: David Bowman Date: Tue, 6 Feb 2018 13:57:30 +0000 Message-ID: To: rsgb_lf_group@blacksheep.org X-Spam-Score: 0.0 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Hi Jim Very interesting orbit. I think that is in the 'gap' between the lower and upper radiation belts. I think AMSAT would give their right arms to have a satellite there. Will be interesting to see how benign that area of space works out to be. [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (davidg0mrf[at]gmail.com) 0.0 HTML_MESSAGE BODY: HTML included in message 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: 852e9a9ee930056348c0102e6df31911 Subject: Re: LF: VLF Transmissions from Spacecraft Content-Type: multipart/alternative; boundary="001a114009b85175e805648b8ffe" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.1 required=5.0 tests=HTML_60_70,HTML_MESSAGE autolearn=no version=2.63 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 --001a114009b85175e805648b8ffe Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi Jim Very interesting orbit. I think that is in the 'gap' between the lower and upper radiation belts. I think AMSAT would give their right arms to have a satellite there. Will be interesting to see how benign that area of space works out to be. 73 David AMSAT-UK On Tue, Feb 6, 2018 at 6:31 AM, wrote: > Falcon Heavy =E2=80=9C50/50 chance=E2=80=9D launch today (1730 UT), witho= ut DSX. DSX > (WPIx) is now on the third Heavy flight, which might be in June if the > preferred =E2=80=9C50=E2=80=9D prevails today. If not, maybe Stefan, Mark= us, Joe, Riccardo > or Tom will come up with something. > > > > Jim AA5BW > > > > *From:* owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@ > blacksheep.org] *On Behalf Of *hvanesce@comcast.net > *Sent:* Monday, June 5, 2017 1:28 AM > *To:* rsgb_lf_group@blacksheep.org > *Subject:* RE: LF: VLF Transmissions from Spacecraft > > > > Correction: 12000km/6000km elliptical retrograde orbit > > > > Also agree 500W could be pulse ERP > > > > > > *From:* hvanesce@comcast.net [mailto:hvanesce@comcast.net > ] > *Sent:* Monday, June 5, 2017 1:15 AM > *To:* 'rsgb_lf_group@blacksheep.org' > *Subject:* RE: LF: VLF Transmissions from Spacecraft > > > > Unofficial r/SpaceX page https://www.reddit.com/r/ > spacex/wiki/launches/manifest now shows December 2017; last update to the > manifest was May 8; looks dependent on F9 Heavy demo launch scheduled for > summer. > > > > Many delays since 2008 (for DSX) due to low priority and special > (9000km/6000km elliptical retrograde) orbit. > > > > Some web references show operational life as 6 months with goal of 12 > months (radiation as one possible limit). > > > > From link below (in prior messages): > > Cross-dipole antenna is 80m tip-to-tip (Y) and 16m tip-to-tip (Z): X,Y > for receive; Y for transmit > > Two TX modes: whistler (3-50 kHz, 500-900W) and boomerang (50-750 kHz, 1 > W)]; real-time tuning/matching > > Dipole receiver sensitivity: 0.01uV/rt-Hz RX > > Separate 3-axis-loop receiver sensitivity: 3fT/rt-Hz > > > > Guessing 500W is specified at the battery. > > > > Jim AA5BW > > > > *From:* owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@ > blacksheep.org ] *On Behalf Of *Claud= io > Pozzi > *Sent:* Thursday, May 18, 2017 5:23 PM > *To:* rsgb_lf_group@blacksheep.org > *Subject:* Re: LF: VLF Transmissions from Spacecraft > > > > On Thursday 18 May 2017 19:45:51 you wrote: > > > FYI: > > > > > > The "DSX" satellite will carry a 0.5-0.9 kw, 3 to 50 kHz (pulsed?) VLF > > > transmitter. > > > > > > Citation from: www.dtic.mil/dtic/tr/fulltext/u2/a531813.pdf : > > > > > > "...and a two week high-power VLF transmission campaign will occur near > the > > > end of the mission." End of life is planned at 12 months after launch a= nd > > > "Early Operations". > > > > > > As far as I understand the tx-antenna will be a 2x40m dipole. > > > > > > Launch is scheduled for 2017-xx-xx (Falcon Heavy launch vehicle). > > > > > > 73 de df3lp, > > > Peter > > > > Interesting mission. > > > > https://directory.eoportal.org/web/eoportal/satellite-missions/d/dsx > > > > Here some details about the spacecraft transmission. > > > > http://smartech.gatech.edu/bitstream/1853/8037/2/SSEC_SD1_doc.pdf > > > > TNX > > > > Claudio ik2pii > > > > ---- > ZE-Light e ZE-Pro: servizi zimbra per caselle con dominio email.it, per > tutti i dettagli clicca qui > > > Sponsor: > Caselle con tuo dominio su piattaforma Zimbra, fino a 30 GB di spazio, > sincronizzazione dati e backup > Clicca qui > --001a114009b85175e805648b8ffe Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi Jim

Very interesting orbit.= =C2=A0 I think that is in the 'gap' between the lower and upper rad= iation belts.
I think AMSAT would give their right arms to have a = satellite there. Will be interesting to see how benign that area of space w= orks out to be.

73

David=C2=A0=C2=A0=C2=A0 AMSAT-UK
=

On Tue, Feb= 6, 2018 at 6:31 AM, <hvanesce@comcast.net> wrote:

Falcon Heavy =E2=80=9C50/50 chance=E2=80=9D la= unch today (1730 UT), without DSX. DSX (WPIx) is now on the third Heavy fli= ght, which might be in June if the preferred =E2=80=9C50=E2=80=9D prevails = today. If not, maybe Stefan, Markus, Joe, Riccardo or Tom will come up with= something. =C2=A0

=C2=A0

Jim AA5BW =C2=A0

=C2=A0

From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@= blacksheep.org] On Behalf Of hvanesce@comcast.net
Sent: Monday, Jun= e 5, 2017 1:28 AM
To: rsgb_lf_group@blacksheep.org
Subject: = RE: LF: VLF Transmissions from Spacecraft

=C2=A0

Correction: 12000km/6000km elliptical retrograde o= rbit

=C2=A0

Also agree 500W could be pulse ERP

=C2=A0

=

=C2=A0

From:<= span style=3D"font-size:10.0pt;font-family:"Tahoma","sans-se= rif""> hvane= sce@comcast.net [mailto:hvanesce@comcast.net]
Sent: Monday, June 5, 2017 = 1:15 AM
To: 'rsgb_lf_group@blacksheep.org'
Subject: = RE: LF: VLF Transmissions from Spacecraft

=C2=A0

Unofficial r/SpaceX page https://www.red= dit.com/r/spacex/wiki/launches/manifest now shows December 2017; l= ast update to the manifest was May 8; looks dependent on F9 Heavy demo laun= ch scheduled for summer.

=C2=A0

Many delays since 2008 (for DSX) due to low p= riority and special (9000km/6000km elliptical retrograde) orbit. =

=C2= =A0

Some= web references show operational life as 6 months with goal of 12 months (r= adiation as one possible limit).

=C2=A0

From link below (in prior messages):<= u>

C= ross-dipole antenna is 80m tip-to-tip (Y) and 16m tip-to-tip (Z): =C2=A0X,Y= for receive; =C2=A0Y for transmit

Two TX modes: whistler (3-50 kHz, 500-900= W) and boomerang (50-750 kHz, 1 W)]; real-time tuning/matching

Dipole receiv= er sensitivity: =C2=A00.01uV/rt-Hz RX

Separate 3-axis-loop receiver sensiti= vity: 3fT/rt-Hz

=C2=A0

Guessing 500W is specified at the battery.<= /u>

=C2= =A0

Jim = AA5BW =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0

=C2=A0

From: owner= -rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacks= heep.org] On Behalf Of Claudio Pozzi
Sent: Thursday, M= ay 18, 2017 5:23 PM
To: rsgb_lf_group@blacksheep.org
Subject: Re: LF: VLF Transmissions from Spacecraft

<= /div>

=C2=A0

On Thursday 18 May 2017 19:45:51 you wr= ote:

= > FYI:

>

> The "DSX" satel= lite will carry a 0.5-0.9 kw, 3 to 50 kHz (pulsed?) VLF

> transm= itter.

>

> Citation from: www.dtic.mil/dtic/t= r/fulltext/u2/a531813.pdf :

>

=

> "...an= d a two week high-power VLF transmission campaign will occur near the

> end of the mission." End of life is planned at 12 months after= launch and

> "Early Operations".=

> =

> Launch is scheduled for 2017-xx-xx (Falcon Heavy launc= h vehicle).

>

> 73 de df3lp,

> Peter

=C2=A0

Interesting mission.

=C2=A0=

https://directory.eoportal.o= rg/web/eoportal/satellite-missions/d/dsx

=C2=A0=

Here some details about the spacecraft transmission.

=C2=A0

http://smartech.g= atech.edu/bitstream/1853/8037/2/SSEC_SD1_doc.pdf

=C2=A0

TNX

=C2=A0

Claudio ik2pii<= /span>

----
ZE-Light e ZE-Pro: servizi zimbra per caselle con dominio email.it, per tutti i dettagl= i clicca qui<= br>
Sponsor:
Caselle con tuo dominio su piattaforma Zimbra, fino a 30= GB di spazio, sincronizzazione dati e backup
Clicca= qui


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