Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-2.3 required=5.0 tests=FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,HTML_MESSAGE,RCVD_IN_DNSWL_MED, SPF_PASS,T_DKIM_INVALID autolearn=ham autolearn_force=no version=3.4.0 X-Spam-DCC: EATSERVER: mailn 1166; Body=2 Fuz1=2 Fuz2=2 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by lipkowski.org (8.14.4/8.14.4/Debian-8+deb8u1) with ESMTP id v555Pq3S025388 for ; Mon, 5 Jun 2017 07:25:53 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1dHkMS-00027K-N1 for rs_out_1@blacksheep.org; Mon, 05 Jun 2017 06:15:28 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1dHkMR-00027B-RW for rsgb_lf_group@blacksheep.org; Mon, 05 Jun 2017 06:15:27 +0100 Received: from resqmta-ch2-12v.sys.comcast.net ([2001:558:fe21:29:69:252:207:44]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1dHkMM-0002A6-Rj for rsgb_lf_group@blacksheep.org; Mon, 05 Jun 2017 06:15:26 +0100 Received: from resomta-ch2-11v.sys.comcast.net ([69.252.207.107]) by resqmta-ch2-12v.sys.comcast.net with SMTP id HkM3d8EsTdlFQHkMHderZ0; Mon, 05 Jun 2017 05:15:17 +0000 X-DKIM-Result: Domain=comcast.net Result=Signature OK DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=comcast.net; s=q20161114; t=1496639717; bh=Y9l3sw7DM59lkZqZnf1MFt39uMU9Vr5x2dVUNH5Ewzs=; h=Received:Received:From:To:Subject:Date:Message-ID:MIME-Version: Content-Type; b=ZK2WxlVKfMJlHNYSGu/CV8l4IuC02mvevxyK8qz6twf/anassCPlRP930DNt/RWc9 ALQprB8OlMquO/zXpnXvru8opvSB6KAtnY49FkeBi2IoSD4dq8QOuHEMROjTNeqxCl KkmR984TjCwOP59mX2qZRyAsTXLabfVK+5DtzJvFWUyjHIo8Xt4kBzprLFoYnImt1S huixsMyJREawN/L2eeigN4zlX3ObDp9DsDYXj8jh7b4tIU+q7lt7ux/pHMEALPcPqb pbmhuLTZf9VozV7bfMA/wnjKDZuIEMcYdSg/tSDeDcN5LwSx40knMlMXCRzMINHWDw RN/CBYEy8JDqg== Received: from Owner ([IPv6:2601:140:8500:7f9f:ec2c:3522:b433:4166]) by resomta-ch2-11v.sys.comcast.net with SMTP id HkMFdw8RjHHARHkMGd29y0; Mon, 05 Jun 2017 05:15:17 +0000 From: To: References: <07558728-336b-cb7c-bc04-4d7718f5b97c@df3lp.de> <1960259.EQv1FmN41F@x220> In-Reply-To: <1960259.EQv1FmN41F@x220> Date: Mon, 5 Jun 2017 01:15:14 -0400 Message-ID: <036a01d2ddba$b7b3b8b0$271b2a10$@comcast.net> MIME-Version: 1.0 X-Mailer: Microsoft Outlook 14.0 Thread-Index: AQJG7D3e+r5e3mKohe8NQhCsSzouGgEI4nx+oSVG4SA= Content-Language: en-us X-CMAE-Envelope: MS4wfBjbtbvIID8Ho9aQzSTaKHpMtKGP0p14mLEpnR7nYfrtrjfT+vFizr2IbAuG2Y4gxKv1gFFI51OHtbff8ySsOHXGjeBwteuxXTOzTZKHSNnHk9L3AOLy zQ4VYT6dPEbU5IXiewqZQ7DuNtBR8G2buiw= X-Scan-Signature: 29168ad3cbe6e84866aad11301f49cdd Subject: RE: LF: VLF Transmissions from Spacecraft Content-Type: multipart/alternative; boundary="----=_NextPart_000_036B_01D2DD99.30A489B0" 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 2.75 Status: RO X-Status: X-Keywords: X-UID: 11893 This is a multipart message in MIME format. ------=_NextPart_000_036B_01D2DD99.30A489B0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit 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 Claudio 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 and > "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 ------=_NextPart_000_036B_01D2DD99.30A489B0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Unofficial r/SpaceX page https://w= ww.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 Claudio = 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 and

> "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/satel= lite-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

------=_NextPart_000_036B_01D2DD99.30A489B0--