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CX2SA > SATDIG 18.12.15 23:17l 1546 Lines 54259 Bytes #999 (0) @ WW
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From: CX2SA@CX2SA.SAL.URY.SOAM
To : SATDIG@WW
Today's Topics:
1. XW-F satellites (Vincenzo Mone)
2. Re: XW-F satellites (Dani EA4GPZ)
3. ISS SSTV activity planned for late Dec. 2015 + SME-SAT (M5AKA)
4. Re: PSLV-C29 TeLEOS-1 Launch (Dr.(Eng.) Giulio MANZONI)
5. Re: Elk Antenna, Midland CT 890 and Full Duplex (Felix Paez)
6. UT1FG/MM active on FO-29 at 18:01Z today, EL83 (Clayton W5PFG)
7. New ISS SSTV Video and "ISS SSTV Reception Hints" webpage
(John Brier)
----------------------------------------------------------------------
Message: 1
Date: Thu, 17 Dec 2015 13:38:17 +0100
From: Vincenzo Mone <vimone@xxxxx.xx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] XW-F satellites
Message-ID: <E1444427-0941-4173-B4D2-69BCA2810785@xxxxx.xx>
Content-Type: text/plain; charset=us-ascii
Hi all
> Has anyone been able to copy the XW- F satellite via 9600 or 19200 baud
FSK and GMSK?
If yes please which program to use?
I am trying with the Funcube Dongle Pro Plus and UZ7HO Soundmodem program.
I get a strong signal from the satellites but nothing decode.
Any help will be really appreciated.
73's de Enzo IK8OZV
Inviato da iPhone
------------------------------
Message: 2
Date: Thu, 17 Dec 2015 13:12:58 +0000
From: Dani EA4GPZ <daniel@xxxxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] XW-F satellites
Message-ID: <5672B4DA.8050004@xxxxxxxx.xxx>
Content-Type: text/plain; charset=windows-1252
El 17/12/15 a las 12:38, Vincenzo Mone escribi?:
> Hi all
>> Has anyone been able to copy the XW- F satellite via 9600 or 19200 baud
FSK and GMSK?
> If yes please which program to use?
> I am trying with the Funcube Dongle Pro Plus and UZ7HO Soundmodem program.
> I get a strong signal from the satellites but nothing decode.
> Any help will be really appreciated.
Hi all,
I've tested again the SDR recordings I did of the XW-2 satellites back
in the days when they were launched. These were quick and dirty
recordings, so the signal is not very good many times.
I've been able to decode plenty of 9600bps packets from XW-2D using
direwolf. I haven't been able to decode any packets from the rest of
the satellites, but that's probably because the signals were not good
enough and had QSB.
If anyone wants to test decoders, you can use the following file, which
comes from my recording of XW-2D and for me produces many decodes using
direwolf (I haven't tested other programs).
https://drive.google.com/file/d/0B2pPGQkeEAfdb3RnTTg4NE9LMmc/view?usp=sharing
73,
Dani M0HXM/EA4GPZ.
------------------------------
Message: 3
Date: Thu, 17 Dec 2015 13:35:51 +0000 (UTC)
From: M5AKA <m5aka@xxxxx.xx.xx>
To: AMSAT BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] ISS SSTV activity planned for late Dec. 2015 +
SME-SAT
Message-ID:
<2061191642.362017.1450359351440.JavaMail.yahoo@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
ISS SSTV activity planned for late Dec. 2015
http://amsat-uk.org/2015/12/17/iss-sstv-activity-planned-for-late-dec-2015/
SME-SAT video
http://amsat-uk.org/2015/12/16/sme-sat-video/
Tim Peake ISS School Contacts Announced
http://amsat-uk.org/2015/12/15/tim-peake-iss-school-contacts-announced/
Tim Peake launch - Amateur Radio in the Media
http://www.southgatearc.org/news/2015/december/tim_peake_launch_amateur_radio_
in_the_media.htm
Helen Sharman and Amateur Radio
http://amsat-uk.org/2015/12/13/helen-sharman-and-amateur-radio/
OSCAR News Issue 212
http://amsat-uk.org/2015/12/09/oscar-news-issue-212/
73 Trevor M5AKA
----
AMSAT-UK?http://amsat-uk.org/
Twitter?https://twitter.com/AmsatUK
Facebook https://facebook.com/AmsatUK
YouTube?https://youtube.com/AmsatUK
----
------------------------------
Message: 4
Date: Thu, 17 Dec 2015 09:44:32 +0800
From: "Dr.\(Eng.\) Giulio MANZONI" <giulio.manzoni@xxxxxxxxxxx.xxx>
To: "Paulo PV8DX" <paulopv8dx@xxxxx.xxx>, "amsat-bb"
<amsat-bb@xxxxx.xxx>
Cc: "Yesie L. Brama" <yesie.l.brama@xxxxxxxxxxx.xxx>
Subject: Re: [amsat-bb] PSLV-C29 TeLEOS-1 Launch
Message-ID: <197451676552467FA9778D6FF4FEA611@xxxxxxxxxxxxxxx>
Content-Type: text/plain; format=flowed; charset="UTF-8";
reply-type=response
thanks Paulo, probably the CW decoding is not complete, voltage should be in
the range of 8V as the satellite cannot work at 3V and we confirmed voltages
about 8.2V and 8.3V.
73
Giulio
-----Original Message-----
From: Paulo PV8DX
Sent: Thursday, December 17, 2015 9:12 AM
To: amsat-bb ; giulio.manzoni@xxxxxxxxxxx.xxx
Subject: Re: [amsat-bb] PSLV-C29 TeLEOS-1 Launch
Hi
Hearing Morse code (Low sound here)
ATX1 M . 3 5V ...... 3 6V
In eclipse - 23:50 UTC 16/DEC
73 de Paulo PV8DX
LABRE/ARRL
AMSAT-BR/AMSAT-NA member
FJ92pt - VUCC SAT
www.labre-rr.org
http://amsat-br.org/
Boa Vista-Roraima
pv8dx@xxxxxxxx.xxx
pv8dx@xxxx.xxx
-----Mensagem Original-----
From: Mani [VU2WMY/KJ6LRS]
Sent: Tuesday, December 15, 2015 6:14 AM
To: BB, AMSAT ; AMSAT-INDIA ; VUHAMS ; isrohams@xxxxxxxxxxx.xxx
Subject: [amsat-bb] PSLV-C29 TeLEOS-1 Launch
Good Wishes and Greetings for the successful launch of PSLV-C29 and
TeLEOS-1 Mission.
This is PSLV's 32nd flight. PSLV C-29 is a core alone version and will
launch Six Satellites of Singapore into a 550 km circular orbit inclined at
15 degrees to the equator.
TeLEOS-1 is the primary satellite and the other five satellites Kent
Ridge-1, VELOX-C1, VELOX-II, Gallassia and Athanoxat-1 are co-passenger
satellites.
Launch on 16.12.2015. 12:30 UTC from Satish Dhawan Space Centre [SDSC],
Shriharikota
So far, 51 satellites from 20 countries have been successfully launched by
PSLV.
NOTE:
Athenoxat-1, a 3U Cubesat has a CW beacon transmitting on 437.485 Mhz
Athenoxat-1 seperation from PSLV at 12:51:02 UTC
Athenoxat-1 would starting sending CW message 30 minutes after separation.
CW message will be ?ATX1? on 437.485 MHz every 1 minute and also with
an indication of battery voltage.
Preliminary TLE for Athenoxat-1
1 12346U 12346U 15350.53544190 .00000000 00000-0 00000-0 0
0003
2 12346 14.9868 209.7101 0004511 307.5625 258.2924 15.05575123 00007
Reception reports are welcome and could be sent to:
giulio.manzoni@xxxxxxxxxxx.xxx
73 de
Mani [VU2WMY/KJ6LRS]
Secretary & Station-In-Charge
Upagrah Amateur Radio Club VU2URC
ISRO Satellite Centre
HAL Airport Road, Bangalore-560 017.
Phone:(Office)91-80-25082598/25082054/25082192
Mobile: 91-9880 341 456
E-mail ID: wmy@xxxx.xxx.xx
vu2wmy_mani@xxxxx.xxx
isrohams@xxxxx.xxx
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_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
to all interested persons worldwide without requiring membership. Opinions
expressed
are solely those of the author, and do not reflect the official views of
AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 5
Date: Thu, 17 Dec 2015 10:17:54 +0100
From: Felix Paez <ea4gqs@xxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] Elk Antenna, Midland CT 890 and Full Duplex
Message-ID:
<CAGfY+e1AqdXbefS+dGMAj3rzAhADOAS31yO+zFaTyG7_+6qTtw@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Thanks Patrick and Dani,
yeah It seems the classic desensing issue... I did not remember that. When
I made the tests with the whip antenna I think it was U/V... I will try
AO-85 and let you know.
Very interesting the links to your messages about the handy tests Patrick,
Regards,
Felix EA4GQS
2015-12-16 19:01 GMT+01:00 <amsat-bb-request@xxxxx.xxx>:
> Send AMSAT-BB mailing list submissions to
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> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of AMSAT-BB digest..."
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>
> Today's Topics:
>
> 1. Improve Orbital-decay predictions (Luc Leblanc)
> 2. Special Membership Offer for Fox-1A launch expiring December
> 31, 2015 (Andrew Glasbrenner)
> 3. Re: Special Membership Offer for Fox-1A launch expiring
> December 31, 2015 (J. Boyd (JR2TTS))
> 4. Re: Help needed please (Aayush Yadav)
> 5. Telemetry Signals Heard from from Athenoxat-1
> (Mani [VU2WMY/KJ6LRS])
> 6. Re: [amsatindia] Telemetry Signals Heard from from
> Athenoxat-1 (Nitin Muttin)
> 7. Elk Antenna, Midland CT 890 and Full Duplex (Felix Paez)
> 8. Re: Elk Antenna, Midland CT 890 and Full Duplex
> (Patrick STODDARD (WD9EWK/VA7EWK))
> 9. Re: Elk Antenna, Midland CT 890 and Full Duplex (Dani EA4GPZ)
> 10. SatPC32c Problem.......... (Carmen Peca)
> 11. Re: AO-7 (Gustavo Nicolau)
> 12. Re: SatPC32c Problem.......... (Burns Fisher)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Tue, 15 Dec 2015 16:32:55 -0500
> From: Luc Leblanc <lucleblanc6@xxxxxxxxx.xx>
> To: amsat-bb@xxxxx.xxx
> Subject: [amsat-bb] Improve Orbital-decay predictions
> Message-ID: <56708707.13240.1374D6A@xxxxxxxxxxx.xxxxxxxxx.xx>
> Content-Type: text/plain; CHARSET=US-ASCII
>
>
>
>
>
>
http://www.nasa.gov/press-release/goddard/plunging-into-the-ionosphere-satelli
te-s-last-days-i
> mprove-orbital-decay-predictions
>
>
> Luc Leblanc VE2DWE
>
>
>
>
>
>
>
>
>
> ------------------------------
>
> Message: 2
> Date: Tue, 15 Dec 2015 22:16:06 -0500
> From: "Andrew Glasbrenner" <glasbrenner@xxxxxxxxxx.xxx>
> To: "'Andrew Glasbrenner'" <glasbrenner@xxxxxxxxxx.xxx>,
> "'amsat-bb'"
> <amsat-bb@xxxxx.xxx>
> Subject: [amsat-bb] Special Membership Offer for Fox-1A launch
> expiring December 31, 2015
> Message-ID: <0cdd01d137b0$1a4fbc60$4eef3520$@xxx>
> Content-Type: text/plain; charset="UTF-8"
>
> We've welcomed dozens of new members since the AO-85 launch with our offer
> of ?Getting Started With The Amateur Satellites? as a free PDF with
> membership in AMSAT, but this offer will come to an end on December 31st,
> 2015. Point your browser to
> http://store.amsat.org/catalog/index.php?cPath=32 and help AMSAT keep
> amateur radio in space, and get a free e-book as a thank you.
>
> 73, Drew KO4MA
> AMSAT-VP Operations
>
> -----Original Message-----
> From: AMSAT-BB [mailto:amsat-bb-bounces@xxxxx.xxxx On Behalf Of Andrew
> Glasbrenner
> Sent: Thursday, October 01, 2015 2:44 PM
> To: amsat-bb
> Subject: [amsat-bb] Special Membership Offer for Fox-1A launch on October
> 8, 2015
>
>
>
> >From http://www.amsat.org/?p=4591
>
> AMSAT?s Fox-1A is set to launch as part of the GRACE (Government Rideshare
> Advanced Concepts Experiment) auxillary payload on the NROL-55 mission
> October 8, 2015 from Vandenburg AFB on an Atlas V vehicle. More details
> will be released when made available from our launch provider. NRO has
> released this factsheet about the mission:
>
http://www.amsat.org/wordpress/wp-content/uploads/2015/10/GRACE_CubeSat_FactSh
eet.pdf
>
> General information on Fox-1A is available in the downloadable AMSAT Fox
> Operating Guide
>
http://www.amsat.org/wordpress/wp-content/uploads/2015/05/FoxOperatingGuide_Ma
y2015_Hi.pdf
>
> FoxTelem software for decoding and submitting telemetry has been made
> available for download at http://www.amsat.org/?page_id=4532 .
>
> As part of the preparations for the launch and activation of this new
> satellite, AMSAT is making our ?Getting Started With The Amateur
> Satellites? book available for a limited time as a download with any paid
> new or renewal membership purchased via the AMSAT Store. This offer is only
> available with purchases completed online, and for only a limited time. A
> perennial favorite, Getting Started is updated every year with the latest
> amateur satellite information, and is the premier primer of satellite
> operation. The 132 page book is presented in PDF format, in full color, and
> covers all aspects of making your first contacts on a ham radio satellite.
>
> Please take advantage of this offer today by visiting the AMSAT store (
> http://store.amsat.org/catalog/) and selecting any membership option.
> While there, check out our other items, including the M2 LEOpack antenna
> system, AMSAT shirts, hats, and other swag. Thank you, and see you soon on
> Fox-1A!
>
> 73, Drew KO4MA
> AMSAT VP Operations
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available to
> all interested persons worldwide without requiring membership. Opinions
> expressed are solely those of the author, and do not reflect the official
> views of AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>
>
>
> ------------------------------
>
> Message: 3
> Date: Wed, 16 Dec 2015 12:30:33 +0900
> From: "J. Boyd (JR2TTS)" <the2belo@xxx.xxxxxxx.xx.xx>
> To: amsat-bb@xxxxx.xxx
> Subject: Re: [amsat-bb] Special Membership Offer for Fox-1A launch
> expiring December 31, 2015
> Message-ID: <20151216122808.BC89.THE2BELO@xxx.xxxxxxx.xx.xx>
> Content-Type: text/plain; charset="UTF-8"
>
> On Tue, 15 Dec 2015 22:16:06 -0500, "Andrew Glasbrenner" <
> glasbrenner@xxxxxxxxxx.xxx> wrote:
>
> > We've welcomed dozens of new members since the AO-85 launch with our
> > offer of ?Getting Started With The Amateur Satellites? as a free PDF
> > with membership in AMSAT, but this offer will come to an end on December
> > 31st, 2015. Point your browser to
> > http://store.amsat.org/catalog/index.php?cPath=32 and help AMSAT keep
> > amateur radio in space, and get a free e-book as a thank you.
>
> And I am one of them! Became a member last weekend. Thanks to all in
> AMSAT and on this board for the helpful information that comes in every
> day.
>
> Now then, can I obtain my SATPC32 password now? It's been four days... :)
>
> --
> J. Boyd, JR2TTS/NI3B
> the2belo@xxx.xxxxxxx.xx.xx
> http://www.flickr.com/photos/the2belo/
> http://www.qrz.com/db/JR2TTS
> Twitter: @xxxxxxxx
>
>
>
> ------------------------------
>
> Message: 4
> Date: Wed, 16 Dec 2015 16:55:37 +0530
> From: Aayush Yadav <aayushyadav825@xxxxx.xxx>
> To: "amsat-bb@xxxxx.xxxx <AMSAT-BB@xxxxx.xxx>
> Subject: Re: [amsat-bb] Help needed please
> Message-ID:
> <CALRS4DzNr7eMdjMpTE=
> UgFhNnNfTCRqdSkvCSCWVKzwvxYuQsA@xxxx.xxxxx.xxx>
> Content-Type: text/plain; charset=UTF-8
>
> Hello all,
>
> Currently we are planning to transmit 1 Watt signal from the satellite but
> due to vswr losses, the transmitted power is around 100 mW. This is due to
> the antenna's S11 loss being around -1 rather than -10. This is for the VHF
> band for which we are using an antenna 17 cm long, thus such high loss. The
> length can not be increased much and so is the case with the
> electronics(power amplifier) as we are restricted by other constraints.
> We would love to hear some of your suggestions so as to how can we still
> increase the transmission power meeting all these requirements. And if not,
> what can be done on the Ground-Station to improve the reception. Are there
> satellites available which transmit such low power and still can be
> received?
> Any Help would be appreciated.
>
> Thanking you,
> Aayush Yadav
> Team Pratham.
>
> On Mon, Dec 7, 2015 at 9:01 AM, Nitin Muttin <vu3tyg@xxxxx.xx.xx> wrote:
>
> > Hi Aayush,
> >
> > As discussed please consider the below points.
> >
> > 1. Fine tune your antennas in the satellite sub band on VHF and UHF. VHF
> -
> > 145.800Mhz - 146.000 Mhz. UHF 435-438 Mhz.
> >
> > 2. Replace the RG -58 Cable with Heliax or LMR 400 Cable.
> >
> > 3. Move the pre amp (LNA) to the mast closer to the antenna.
> >
> > 4. Refer http://www.dk3wn.info/satellites.shtml for the list of
> > satellites , modes and frequencies.
> >
> > 5. For some satellites you can use sound card based software TNC like
> > http://uz7.ho.ua/packetradio.htm for AX25.
> >
> > 73
> > Nitin [VU3TYG]
> >
> > ------------------------------
> > *From:* Aayush Yadav <aayushyadav825@xxxxx.xxx>
> > *To:* Nitin Muttin <vu3tyg@xxxxx.xx.xx>
> > *Cc:* Mani VU2 WMY <wmy@xxxx.xxx.xx>; Somashekar S. <vu3jba@xxxxx.xxx>
> > *Sent:* Saturday, 5 December 2015 2:27 PM
> > *Subject:* Re: Help needed please
> >
> > Hello sir,
> > As discussed over the phone, could you please provide me with the various
> > satellites to track, information regarding softwares and the cables.
> > Thank you sir,
> >
> > Yours sincerely,
> > Aayush
> > Team pratham
> >
> >
> >
> > On Tue, Dec 1, 2015 at 6:28 PM, Nitin Muttin <vu3tyg@xxxxx.xx.xx> wrote:
> >
> > Hi Aayush,
> >
> > Sure, we can discuss on Saturday after 11AM. I can be reached on
> > 9880018675.
> >
> > 73
> > Nitin [VU3TYG]
> >
> > ------------------------------
> > *From:* Aayush Yadav <aayushyadav825@xxxxx.xxx>
> > *To:* Nitin Muttin <vu3tyg@xxxxx.xx.xx>
> > *Cc:* Mani VU2 WMY <wmy@xxxx.xxx.xx>; Somashekar S. <vu3jba@xxxxx.xxx>
> > *Sent:* Tuesday, 1 December 2015 3:40 PM
> >
> > *Subject:* Re: [amsat-bb] Help needed please
> >
> > Hi Nitin,
> > I was wondering if you were free this week, we would really appreciate
> the
> > help.
> >
> > Thanking you,
> >
> > Regards,
> > Aayush Yadav
> > Team Pratham.
> >
> >
> >
> > On Tue, Nov 24, 2015 at 9:10 PM, Nitin Muttin <vu3tyg@xxxxx.xx.xx>
> wrote:
> >
> > Sure Aayush we can discuss this next week over a phone call. This week we
> > have a tight schedule to the HAMFEST 2015 in Rajkot.
> >
> > 73
> > Nitin [VU3TYG]
> > Secretary, AMSAT INDIA
> > www.amsatindia.org
> >
> > ------------------------------
> > *From:* Aayush Yadav <aayushyadav825@xxxxx.xxx>
> > *To:* Nitin Muttin <vu3tyg@xxxxx.xx.xx>
> > *Sent:* Tuesday, 24 November 2015 7:37 PM
> >
> > *Subject:* Re: [amsat-bb] Help needed please
> >
> > Hello Nitin,
> >
> > We would love to have your help on the same. If you have any advice on
> how
> > we should continue our work we really welcome the suggestions. Thanks a
> lot
> > for your reply.
> > If you could help us in improving our sensitivity, as currently we get
> > around -110 dbm noise at the antenna but as per our calculations the
> power
> > of the signal we need to recieve would be of an order of -150 dbm.
> >
> > 73
> > Aayush Yadav.
> > Team Pratham.
> >
> >
> >
> > On Tue, Nov 24, 2015 at 11:40 AM, Nitin Muttin <vu3tyg@xxxxx.xx.xx>
> wrote:
> >
> > Thanks Burns for the pointers.
> >
> > @xxxxxxx I can help you with information so that you are able to
> > successfully receive and decode telemetry.
> >
> > 73
> > Nitin [VU3TYG]
> >
> > ------------------------------
> > *From:* Burns Fisher <burns@xxxxxx.xx>
> > *To:* Aayush Yadav <aayushyadav825@xxxxx.xxx>
> > *Cc:* "amsat-bb@xxxxx.xxxx <AMSAT-BB@xxxxx.xxx>
> > *Sent:* Tuesday, 24 November 2015 1:28 AM
> > *Subject:* Re: [amsat-bb] Help needed please
> >
> > Hello Aayush,
> >
> > Starting out with very strong signals is probably a good idea even though
> > you can probably get any satellite
> > that you wish with a good ground station. Start out with AO-85 for FM
> > reception and AO-73 for SSB
> > reception. AO-73 is especially strong during local day time during
> > Mon-Friday (UTC). There is not
> > transponder turned on then, so all the power goes into the telemetry.
> >
> > Both of these can be received with an HT (handheld with a simple antenna)
> > so you are very likely to receive
> > them on any station you have and optimize from there.
> >
> > I would also suggest that you might find local colleagues in AMSAT-India
> > who would be able to tell you
> > things of local interest (what parts are available where, for example).
> >
> > 73,
> >
> > Burns W2BFJ
> >
> > On Mon, Nov 23, 2015 at 2:16 PM, Aayush Yadav <aayushyadav825@xxxxx.xxx>
> > wrote:
> >
> > > Hello all,
> > >
> > > As a part of a student satellite project from India, I have a few
> > questions
> > > regarding how can i improve my reception of data on the ground station.
> > We
> > > have a TS2000 and have designed a few yagi antennas for uhf and vhf
> > band. I
> > > would like to know some satellites on which we can practice receiving
> any
> > > signal. We are totally new to this system and have practiced some
> failed
> > > attempts of the same. Further, we would really appreciate If anyone
> could
> > > help on how we can increase our reception power. Any other help or
> advice
> > > would also be appreciated. Thank you.
> > >
> > > Aayush Yadav,
> > > Team Pratham,
> > > IIT Bombay.
> > > _______________________________________________
> > > Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
> > > to all interested persons worldwide without requiring membership.
> > Opinions
> > > expressed
> > > are solely those of the author, and do not reflect the official views
> of
> > > AMSAT-NA.
> > > Not an AMSAT-NA member? Join now to support the amateur satellite
> > program!
> > > Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
> >
> >
> >
> > >
> > _______________________________________________
> > Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
> > to all interested persons worldwide without requiring membership.
> Opinions
> > expressed
> > are solely those of the author, and do not reflect the official views of
> > AMSAT-NA.
> > Not an AMSAT-NA member? Join now to support the amateur satellite
> program!
> > Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
>
>
> ------------------------------
>
> Message: 5
> Date: Wed, 16 Dec 2015 19:54:25 +0530
> From: "Mani [VU2WMY/KJ6LRS]" <wmy@xxxx.xxx.xx>
> To: "BB, AMSAT" <amsat-bb@xxxxx.xxx>, amsatindia@xxxxxxxxxxx.xxxx
> VUHAMS <vuhams@xxxxxxxxxxx.xxx>, isrohams@xxxxxxxxxxx.xxx
> Cc: giulio.manzoni@xxxxxxxxxxx.xxx
> Subject: [amsat-bb] Telemetry Signals Heard from from Athenoxat-1
> Message-ID: <20151216141858.1A88685EB@xxxxxxxxxx.xxxxx.xxx>
> Content-Type: text/plain; charset=utf-8; format=flowed; DelSp=Yes
>
> Hello All,
>
> Heard strong CW telemetry signals from just launched Athenoxat-1on 437.485
> Mhz at 14:09 UTC during its first 22 degrees southern pass over Bangalore,
> India.
>
> But, couldn't decode as it was too fast.
>
> Good wishes and greetings from all of us here in India for an early and
> successful commissioning of all the six satellites from Singapore.
>
> 73 de
> Mani [VU2WMY/KJ6LRS]
> Secretary & Station-In-Charge
> Upagrah Amateur Radio Club VU2URC
> ISRO Satellite Centre
> HAL Airport Road, Bangalore-560 017.
> Phone:(Office)91-80-25082598/25082054/25082192
> Mobile:? 91-9880 341 456
> E-mail ID: wmy@xxxx.xxx.xx
> ? ? ? ? ? ?vu2wmy_mani@xxxxx.xxx
> ? ? ? ? ? ?isrohams@xxxxx.xxx
>
>
------------------------------------------------------------------------------
> Confidentiality Notice: This e-mail message, including any attachments, is
> for
> the sole use of the intended recipient(s) and may contain confidential and
> privileged information. Any unauthorized review, use, disclosure or
> distribution is prohibited. If you are not the intended recipient, please
> contact the sender by reply e-mail and destroy all copies of the original
> message.
>
>
------------------------------------------------------------------------------
>
>
>
> ------------------------------
>
> Message: 6
> Date: Wed, 16 Dec 2015 14:35:38 +0000 (UTC)
> From: Nitin Muttin <vu3tyg@xxxxx.xx.xx>
> To: "amsatindia@xxxxxxxxxxx.xxxx <amsatindia@xxxxxxxxxxx.xxx>, "BB,
> AMSAT" <amsat-bb@xxxxx.xxx>, VUHAMS <vuhams@xxxxxxxxxxx.xxx>,
> "isrohams@xxxxxxxxxxx.xxxx <isrohams@xxxxxxxxxxx.xxx>
> Cc: "giulio.manzoni@xxxxxxxxxxx.xxxx <giulio.manzoni@xxxxxxxxxxx.xxx>
> Subject: Re: [amsat-bb] [amsatindia] Telemetry Signals Heard from from
> Athenoxat-1
> Message-ID:
> <1463093728.2023426.1450276538901.JavaMail.yahoo@xxxx.xxxxx.xxx>
> Content-Type: text/plain; charset=UTF-8
>
> Congrats Mani, I could not hear any signals will try next pass?73
> Nitin [VU3TYG]
>
> From: "'Mani [VU2WMY/KJ6LRS]' wmy@xxxx.xxx.xx [amsatindia]" <
> amsatindia@xxxxxxxxxxx.xxx>
> To: "BB, AMSAT" <amsat-bb@xxxxx.xxx>; amsatindia@xxxxxxxxxxx.xxxx VUHAMS
> <vuhams@xxxxxxxxxxx.xxx>; isrohams@xxxxxxxxxxx.xxx
> Cc: giulio.manzoni@xxxxxxxxxxx.xxx
> Sent: Wednesday, 16 December 2015 7:54 PM
> Subject: [amsatindia] Telemetry Signals Heard from from Athenoxat-1
>
> ? Hello All,
>
> Heard strong CW telemetry signals from just launched Athenoxat-1on 437.485
> Mhz at 14:09 UTC during its first 22 degrees southern pass over Bangalore,
> India.
>
> But, couldn't decode as it was too fast.
>
> Good wishes and greetings from all of us here in India for an early and
> successful commissioning of all the six satellites from Singapore.
>
> 73 deMani [VU2WMY/KJ6LRS]
> Secretary & Station-In-Charge
> Upagrah Amateur Radio Club VU2URC
> ISRO Satellite Centre
> HAL Airport Road, Bangalore-560 017.
> Phone:(Office)91-80-25082598/25082054/25082192
> Mobile:? 91-9880 341 456
> E-mail ID: wmy@xxxx.xxx.xx
> ? ? ? ? ? ?vu2wmy_mani@xxxxx.xxx
> ? ? ? ? ? ?isrohams@xxxxx.xxx
> Confidentiality Notice: This e-mail message, including any attachments, is
> for the sole use of the intended recipient(s) and may contain confidential
> and privileged information. Any unauthorized review, use, disclosure or
> distribution is prohibited. If you are not the intended recipient, please
> contact the sender by reply e-mail and destroy all copies of the original
> message.
> __._,_.___ Posted by: "Mani [VU2WMY/KJ6LRS]" <wmy@xxxx.xxx.xx>
> | Reply via web post | ? | Reply to sender | ? | Reply to group
> | ? | Start a New Topic | ? | Messages in this topic (1) |
>
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> .
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>
> ------------------------------
>
> Message: 7
> Date: Wed, 16 Dec 2015 17:59:36 +0100
> From: Felix Paez <ea4gqs@xxxxx.xxx>
> To: amsat-bb@xxxxx.xxx
> Subject: [amsat-bb] Elk Antenna, Midland CT 890 and Full Duplex
> Message-ID:
> <
> CAGfY+e0JsnHWGn62Tvsac2kRSAX0zb0n9cuF6Lt33PgvBqmRFQ@xxxx.xxxxx.xxx>
> Content-Type: text/plain; charset=UTF-8
>
> Hi all,
>
>
>
> First of all, thanks for your patience. Still learning!
>
>
>
> Well, until few days ago I have been able to do many contacts throught
> SO-50 using my Baofeng UV-5R and Elk antenna in half duplex.
>
>
>
> I wanted to go next step and try Full Duplex so I bought a Midland CT 890
> Full Duplex handy (129 eur).
>
>
>
> I can tell that the Midland receiver seems much better than the Baofeng
> one. I have been able to work (still half duplex) even when the satellite
> was a few degrees over the horizon. The Baofeng seems much deaf than the
> Midland, but this my subjective experience. The measured sensitivities I
> got from a review are: 0.179 uV (12 dB SINAD) in VHF and 0.205 uv (12 dB
> SINAD) in UHF but I don?t have the Baofeng values. If somebody has them It
> would be nice if you share so we can compare.
>
>
>
> I have checked that the Full Duplex mode works by transmiting with it and
> at the same time receiving a signal from the Baofeng UV-5R but all this
> using the whip antenna that comes with the Midland.
>
>
>
> The problem comes when I connect the Elk antenna to it. If I press the PTT
> the receiver noise goes to maximum. I tried to make a contact with the
> SO-50 but I could not hear anything when I pressed the PTT. All was noise.
> I had to disable the Full Duplex and then I was able to make some nice
> contacts (EA1JM, CU2ZG?) in half duplex.
>
>
> So my questions are?
>
> 1. Is it possible to use a single Log Periodic antenna (only one feed
> point) as the Elk to work Full Duplex or two antennas are needed?
>
> 2. In case that it is possible? Would this improve by using separate
> receiver and transmitter with a filter that gives a feed point for VHF and
> another one for UHF? (the Elk antenna only has a feed point)
>
> I have to make more tests but at first time, It does not seem possible to
> use the Midland CT 890 (and maybe other full duplex handys?) with the Elk
> antenna in Full Duplex?
>
>
>
> Thanks. Any comments are always welcome
>
>
>
> Felix EA4GQS
>
>
> ------------------------------
>
> Message: 8
> Date: Wed, 16 Dec 2015 10:19:38 -0700
> From: "Patrick STODDARD (WD9EWK/VA7EWK)" <amsat-bb@xxxxxx.xxx>
> To: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
> Subject: Re: [amsat-bb] Elk Antenna, Midland CT 890 and Full Duplex
> Message-ID:
> <
> CAN6TEUfDxADq1yoHw3AEGaD+2FA5SQkQksya8XYmtz_6n0cn+Q@xxxx.xxxxx.xxx>
> Content-Type: text/plain; charset=UTF-8
>
> Hola, Felix!
>
> Your Midland CT-890 is very similar to the Wouxun KG-UV8D HT,
> which has been on sale in much of the world for the past year
> and a half. I have not seen the CT-890 here, but I'll offer
> some answers to your questions based on the thought that these
> radios are very similar, if not the same, but sold with different
> model numbers...
>
> 1. Yes, you can use a log periodic antenna to work satellites
> full-duplex using your CT-890, but not SO-50. The HT's 70cm
> receiver is desensed when you transmit on 2m, and this happens
> when using other antennas as well. You may be able to work
> the new AO-85 satellite full-duplex with this HT, as you
> would transmit to AO-85 on 70cm instead of 2m, and avoid
> the internal desense issues you experienced when transmitting
> to SO-50 on 2m. This is a common issue with a few of the
> Chinese-made dual-band HTs that are advertised as having
> full-duplex capabilities.
>
> 2. A separate receiver and transmitter for SO-50 should let
> you work SO-50 full-duplex. You could use the Baofeng HT as
> your transmit radio, and use the better receiver in your
> CT-890 to hear the satellite downlink. This should also work
> for LilacSat-2 (2m uplink, 70cm downlink) and AO-85 - but
> you may be able to work AO-85 full-duplex with just your
> CT-890.
>
> I had written about my experiences using my KG-UV8D to work
> AO-85 full-duplex in a couple of posts to this list in
> October and November:
>
> http://amsat.org/pipermail/amsat-bb/2015-October/055462.html
> http://amsat.org/pipermail/amsat-bb/2015-November/056254.html
>
> You can also read about my tests with a few other HTs with
> AO-85 from another AMSAT-BB post I made early this month:
>
> http://amsat.org/pipermail/amsat-bb/2015-December/056269.html
>
> You may find these posts useful, as you work with your new
> CT-890.
>
> Buena suerte, y 73!!
>
>
>
>
> Patrick WD9EWK/VA7EWK
> http://www.wd9ewk.net/
> Twitter: @xxxxxx
>
>
>
> On Wed, Dec 16, 2015 at 9:59 AM, Felix Paez <ea4gqs@xxxxx.xxx> wrote:
>
> > Hi all,
> >
> >
> >
> > First of all, thanks for your patience. Still learning!
> >
> >
> >
> > Well, until few days ago I have been able to do many contacts throught
> > SO-50 using my Baofeng UV-5R and Elk antenna in half duplex.
> >
> >
> >
> > I wanted to go next step and try Full Duplex so I bought a Midland CT 890
> > Full Duplex handy (129 eur).
> >
> ?
> ?<snip>?
>
>
>
> > So my questions are?
> >
> > 1. Is it possible to use a single Log Periodic antenna (only one feed
> > point) as the Elk to work Full Duplex or two antennas are needed?
> >
> > 2. In case that it is possible? Would this improve by using separate
> > receiver and transmitter with a filter that gives a feed point for VHF
> and
> > another one for UHF? (the Elk antenna only has a feed point)
> >
> > I have to make more tests but at first time, It does not seem possible to
> > use the Midland CT 890 (and maybe other full duplex handys?) with the Elk
> > antenna in Full Duplex?
> >
> >
> >
>
>
> ------------------------------
>
> Message: 9
> Date: Wed, 16 Dec 2015 17:21:12 +0000
> From: Dani EA4GPZ <daniel@xxxxxxxx.xxx>
> To: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
> Subject: Re: [amsat-bb] Elk Antenna, Midland CT 890 and Full Duplex
> Message-ID: <56719D88.3080502@xxxxxxxx.xxx>
> Content-Type: text/plain; charset=utf-8
>
> El 16/12/15 a las 16:59, Felix Paez escribi?:
>
> > The problem comes when I connect the Elk antenna to it. If I press the
> PTT
> > the receiver noise goes to maximum. I tried to make a contact with the
> > SO-50 but I could not hear anything when I pressed the PTT. All was
> noise.
> > I had to disable the Full Duplex and then I was able to make some nice
> > contacts (EA1JM, CU2ZG?) in half duplex.
>
> Hi Felix,
>
> Probably you are experiencing desensing on the receiver caused by the
> transmit signal. This is much worse when working V/U because the 3rd
> harmonic of the TX signal lies on the 70cm band. Patrick WD9EWK has made
> many tests with different inexpensive Chinese full-duplex radios and it
> seems that most of them are fine to work AO-85 (which is U/V) but it's
> impossible to work SO-50 with any of them. Perhaps you could have more
> luck with AO-85.
>
> >
> > So my questions are?
> >
> > 1. Is it possible to use a single Log Periodic antenna (only one feed
> > point) as the Elk to work Full Duplex or two antennas are needed?
>
> Yes. It's technically possible, although, as I said, desense can be an
> issue. I think that it's worse with the elk than with, say the arrow
> (which is two crossed yagis) because the coupling between the TX and RX
> is much greater on the elk than on the arrow.
>
> > 2. In case that it is possible? Would this improve by using separate
> > receiver and transmitter with a filter that gives a feed point for VHF
> and
> > another one for UHF? (the Elk antenna only has a feed point)
>
> If you have a 2m/70cm duplexer, you can try using two radios. Perhaps a
> cheap Baofeng for TX and the Midland (which is more sensitive) for RX.
> This will probably be much better than just using the Midland
> full-duplex, because the external duplexer will provide better isolation
> than the one on the Midland.
>
> > I have to make more tests but at first time, It does not seem possible to
> > use the Midland CT 890 (and maybe other full duplex handys?) with the Elk
> > antenna in Full Duplex?
>
> It seems that it's difficult to get a handheld that can do V/U
> full-duplex. However, U/V is much easier.
>
> 73,
>
> Dani M0HXM/EA4GPZ.
>
>
>
> ------------------------------
>
> Message: 10
> Date: Wed, 16 Dec 2015 12:44:04 -0500
> From: "Carmen Peca" <carmenpeca@xxxxxxx.xxx>
> To: <amsat-bb@xxxxx.xxx>
> Subject: [amsat-bb] SatPC32c Problem..........
> Message-ID: <000301d13829$5bb38000$131a8000$@xxxxxxx.xxx>
> Content-Type: text/plain; charset="us-ascii"
>
> Hi All, I was wondering if anyone has had any problem with SatPC32c and CAT
> control. I have been running SatPC32b with the 910H and everything worked
> perfectly. I upgraded to version "C" and the LVB rotor control works fine
> but I cannot get the CAT working. I made sure everything worked Ok with Ham
> Radio Deluxe, and it worked flawlessly changed frequencies and mode with no
> problems using the same com port. If anyone can point me in the right
> direction to correct this, it would be greatly appreciated.
>
> Thanks,73
> Carm,WO3T
>
>
>
> ------------------------------
>
> Message: 11
> Date: Wed, 16 Dec 2015 15:46:41 -0200
> From: Gustavo Nicolau <bombeiro.gustavo@xxxxx.xxx>
> To: amsat-bb@xxxxx.xxx
> Subject: Re: [amsat-bb] AO-7
> Message-ID:
> <CAGHu4f9aOUWSJmrND03t0AyEAT5_+6+x6eUCWZ=
> yKTgiAhBYsA@xxxx.xxxxx.xxx>
> Content-Type: text/plain; charset=UTF-8
>
> Hi all. Today i'm qrv in AO7. 73 de PT9BM. Gustavo Nicolau. GH40
>
> 2015-12-12 13:56 GMT-02:00 Gustavo Nicolau <bombeiro.gustavo@xxxxx.xxx>:
>
> > > Hello to all, gud condictions today via AO7. I'm QRV.
> > >
> > > 73 de PT9BM.
> >
>
>
> ------------------------------
>
> Message: 12
> Date: Wed, 16 Dec 2015 13:01:09 -0500
> From: Burns Fisher <burns@xxxxxx.xx>
> To: Carmen Peca <carmenpeca@xxxxxxx.xxx>
> Cc: AMSAT BB <amsat-bb@xxxxx.xxx>
> Subject: Re: [amsat-bb] SatPC32c Problem..........
> Message-ID:
> <CABX7KxU8pcMFGVqPK+fdZE-z+cTn_0dFtqtUxM=
> 4qPtiHr1+xA@xxxx.xxxxx.xxx>
> Content-Type: text/plain; charset=UTF-8
>
> Hi Carmen,
>
> I'm having trouble with my TS-2000 as well, but I have not used it for a
> while (and have not really tried to debug it very much). However, check
> the release notes on SatPC32c. When I was scanning around, I found that it
> said to change a couple check boxes for some radios. It did not solve my
> TS-2000 problem, but I don't remember if the 910H was also one that
> required a change.
>
> 73,
>
> Burns W2BFJ
>
> On Wed, Dec 16, 2015 at 12:44 PM, Carmen Peca <carmenpeca@xxxxxxx.xxx>
> wrote:
>
> > Hi All, I was wondering if anyone has had any problem with SatPC32c and
> CAT
> > control. I have been running SatPC32b with the 910H and everything worked
> > perfectly. I upgraded to version "C" and the LVB rotor control works fine
> > but I cannot get the CAT working. I made sure everything worked Ok with
> Ham
> > Radio Deluxe, and it worked flawlessly changed frequencies and mode with
> no
> > problems using the same com port. If anyone can point me in the right
> > direction to correct this, it would be greatly appreciated.
> >
> > Thanks,73
> > Carm,WO3T
> >
> > _______________________________________________
> > Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
> > to all interested persons worldwide without requiring membership.
> Opinions
> > expressed
> > are solely those of the author, and do not reflect the official views of
> > AMSAT-NA.
> > Not an AMSAT-NA member? Join now to support the amateur satellite
> program!
> > Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
> >
>
>
> ------------------------------
>
> Subject: Digest Footer
>
> _______________________________________________
> Sent via amsat-bb@xxxxx.xxx.
> AMSAT-NA makes this open forum available to all interested persons
> worldwide without requiring membership. Opinions expressed
> are solely those of the author, and do not reflect the official views of
> AMSAT-NA.
> Not an AMSAT member? Join now to support the amateur satellite program!
> http://www.amsat.org/mailman/listinfo/amsat-bb
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> ------------------------------
>
> End of AMSAT-BB Digest, Vol 10, Issue 385
> *****************************************
>
------------------------------
Message: 6
Date: Thu, 17 Dec 2015 12:43:16 -0600
From: Clayton W5PFG <w5pfg@xxxxx.xxx>
To: AMSAT-BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] UT1FG/MM active on FO-29 at 18:01Z today, EL83
Message-ID: <56730244.3040607@xxxxx.xxx>
Content-Type: text/plain; charset=utf-8; format=flowed
Yuri, UT1FG, was active on FO-29 today for the 18:01Z pass. He was
operating from EL83 and indicated his next operation would be from EL94.
It appears he's on the move after leaving Port Tampa Bay.
73
Clayton
W5PFG
------------------------------
Message: 7
Date: Thu, 17 Dec 2015 15:35:04 -0500
From: John Brier <johnbrier@xxxxx.xxx>
To: AMSAT BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] New ISS SSTV Video and "ISS SSTV Reception Hints"
webpage
Message-ID:
<CALn0fKPcrkuei4xCZ7mgYuUJcWXUdhg=nE8J4861ier+xFxrCQ@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
To help promote the tentative December 26th International Space
Station Slow Scan TV event (and another that is planned over the next
few months) I made a new video of an ISS SSTV reception I filmed last
April. I also made an extensive webpage with information, resources,
and hints on receiving ISS SSTV events, including the upcoming ones.
Video: My First Perfect ISS SSTV Image!
https://www.youtube.com/watch?v=7to9uX1sWC4
Webpage: ISS SSTV Reception Hints
https://spacecomms.wordpress.com/iss-sstv-reception-hints/
Below is a text formatted version of the webpage I made
= Table of Contents =
Next planned event
Recommended decoding software
Tracking the ISS
What to expect during a pass
Hints
= Next planned event =
Tentative plans are being made for the International Space Station to
transmit Slow Scan TV images the weekend of December 26th to celebrate
15 years of continuous amateur radio operations on the ISS. A second
weekend event is planned over the coming months.
With 25 watts of power coming from the radio on the ISS, the signal,
transmitted on 145.800 MHz, can be received with a setup as simple as
a handheld amateur radio or scanner, and a rubber duck antenna.
Decoding the images can be as simple as holding the radio next to the
microphone of an iOS or Android device.
Ideally though, you would use a high gain or directional antenna, and
an audio cable connected directly between the radio and decoding
device, whether it?s a smart phone or a computer. Whatever software
you use, make sure it?s set to SSTV mode PD120, as that?s what the ISS
will be using, and if you don?t set that, you might not decode any
images at all (see hint below).
= Recommended decoding software =
For iOS use ?CQ SSTV?
https://itunes.apple.com/app/sstv/id387910013
For Android use ?Robot36?
https://play.google.com/store/apps/details?id=xdsopl.robot36&hl=en
For Windows use ?MMSSTV? (see AMSAT UK link below for setup)
http://hamsoft.ca/pages/mmsstv.php
For Mac OS X use ?Multiscan 3B SSTV? (not verified)
http://www.qsl.net/kd6cji/
= Tracking the ISS =
Howto use heavens-above.com to track the ISS
https://spacecomms.wordpress.com/howto-use-heavens-above-com-to-track-the-iss/
== Other ISS tracking methods ==
== Websites: ==
ISS Fan Club
http://issfanclub.com/
ISSTracker (no predictions, just live tracking)
http://www.isstracker.com/
Android:
Heavens-Above
https://play.google.com/store/apps/details?id=com.heavens_above.viewer
ISS Dectector Satellite Tracker
https://play.google.com/store/apps/details?id=com.runar.issdetector
iOS:
Space Station (ISS) (not verified)
https://itunes.apple.com/us/app/space-station-iss/id301984767?mt=8
= What to expect during a pass =
SSTV mode PD120 will be used instead of PD180 which was used during
previous SSTV events this year. With PD180 it takes about 3 minutes to
send an image. With PD120 it takes about 2 minutes to send an image.
Since images transmitted with PD120 take less time to send than with
PD180, more images can be received during a single ISS pass.
An ISS pass that goes right overhead (90 degrees elevation), lasts
about 10 minutes. ISS SSTV transmit time and off time are usually
setup to provide the radio with a 50% duty cycle (only transmit half
the time so the radio doesn?t overheat). With image transmission
taking two minutes, off time will probably be two minutes as well.
Compared to previous SSTV events using PD180, this means it should be
relatively easy to receive at least two complete images in one pass,
with the possibility to receive up to three images if timing,
conditions, and setup are ideal.
When the ISS comes into view/has line of sight with you, this is known
as Acquisition of Signal, or AOS. The ideal situation for a high
elevation 10 minute pass would be if the first image started
transmitting exactly at your AOS, and you had a directional antenna so
you could receive the signal even while the ISS was very low in the
beginning and end of the pass.
In this case you would be able to receive three images like this:
minute, image TX/off
0-2, complete image 1
2-4, off
4-6, complete image 2
6-8, off
8-9, complete image 3
The more common situation will be that the first image transmission
will start either before or after AOS. In this case you will only have
the opportunity to receive two complete images, but this is still
twice the amount of images that were possible with PD180. The downside
is the image quality is not as high as with PD180.
Even though you?ll have the opportunity to receive two complete
images, don?t expect to. It may take practice and it will certainly
take the right setup and conditions, to get just one complete image.
With that said, here are some tips that may help you get more images
and/or better images.
= Hints =
== Check Twitter for #ISS #SSTV status and images ==
For several hours after the April and July 2015 SSTV events were
scheduled to start, only a ?blank signal? was transmitted. There was
no audio so no images could be decoded. During these events Twitter
users all over the world posted what they heard using hashtags #ISS
#SSTV. As soon as people started hearing the SSTV audio, they reported
it on Twitter.
By searching for these hashtags you can stay up to date on the current
status of the transmissions, which sometimes go longer than scheduled.
Maybe more importantly, you can also see all the images people are
getting!
https://twitter.com/search?q=%23ISS%20%23SSTV
== Open the squelch ==
For weak signal work you always want to leave the squelch wide open to
avoid missing any signals. Even though the radio used for ISS SSTV
puts out 25 watts, which is a lot for an amateur radio satellite, the
signal is still relatively weak when it?s hundreds of miles away and
hundreds of miles high. Don?t miss any of the signal. Keep the squelch
open.
This will also make it easier to identify the signal when it first
comes in, or when the transmission first starts because the change
between the high volume of the noise/static and the relative low
volume of the transmitted signal will be more noticeable than if you
had the squelch closed.
== Record audio and decode later ==
During previous SSTV events some listeners didn?t configure their SSTV
apps/software for the right mode. Even though they received the
signal/audio from the ISS, since the software wasn?t configured
properly, they decoded no images.
A wise choice would be to just record the audio from the radio and
play it back later when you have time to experiment with different
settings. This also makes it easier to fix slanted images/correct for
bad sync, which are common issues.
If you decide to just record the audio and worry with decoding later,
record the audio at a high quality to preserve as much of the original
fidelity of the audio as possible, otherwise the quality of the image
will suffer.
== Try low elevation passes if you have a directional antenna ==
If you?re using a directional antenna like an Arrow II antenna or a
tape measure antenna, don?t limit yourself to high elevation/altitude
passes.
With the 25 watt ISS SSTV transmissions, you can receive the signal
from horizon to horizon. Even a pass with only a max elevation of five
degrees can produce good images.
= Other resources =
== AMSAT UK webpage for beginners ==
If you?re using MMSSTV, please see the advice on configuring it at the
following AMSAT UK webpage. Also check it out for more detailed
information on ISS SSTV.
http://amsat-uk.org/beginners/iss-sstv/
(Thanks to AMSAT UK for the above page, as I used it for a couple of
the decoding software links and inspiration for this page. I tried not
to duplicate much though, so please read it too.)
== AMSAT-UK announcement for tentative December 26th-27th event ==
http://amsat-uk.org/2015/12/17/iss-sstv-activity-planned-for-late-dec-2015/
== YouTube videos of past ISS SSTV receptions ==
Watch YouTube videos of people receiving images during previous events
to see how they did it. You can start with two of my videos!
My First ISS SSTV reception ? April 2015
https://www.youtube.com/watch?v=s2Y3BKZ9vPo
My First Perfect ISS SSTV Image! ? April 2015
https://www.youtube.com/watch?v=7to9uX1sWC4
= End =
Good Luck and 73!
John, KG4AKV, Raleigh North Carolina, United States
------------------------------
Subject: Digest Footer
_______________________________________________
Sent via amsat-bb@xxxxx.xxx.
AMSAT-NA makes this open forum available to all interested persons worldwide
without requiring membership. Opinions expressed
are solely those of the author, and do not reflect the official views of
AMSAT-NA.
Not an AMSAT member? Join now to support the amateur satellite program!
http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
End of AMSAT-BB Digest, Vol 10, Issue 387
*****************************************
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