ARLA/CLUSTER: ISS Slow Scan TV Active on Weekend of April 11

[João Costa > CT1FBF]

---------- Forwarded message ----------
From: Carlos Nora <carlosnora.ct1end  gmail.com>
Date: 2015-03-31 20:06 GMT+01:00
Subject: [CT-Com. & Tec.] ISS Slow Scan TV Active on Weekend of April 11
To: Lista REP-RedeEmissoresPortugueses <
rep-redeemissoresportugueses  yahoogrupos.com.br>, "Lista CT-Com.Tecn" <
ct-comunicacoes-e-tecnologias  googlegroups.com>



[image: ISS SSTV image 9/12 received by Frank Heritage M0AEU at 19:21 UT on
Dec 18, 2014]
<https://ukamsat.files.wordpress.com/2014/12/iss-sstv-frank-heritage-m0aeu-2014-12-18-192100z.jpg>

ISS SSTV image 4/12 received by Frank Heritage M0AEU at 19:21 UT on Dec 18,
2014

The Russian Federal Space Agency (Roscosmos) has announced another round of
amateur radio Slow Scan Television (SSTV) activity from the International
Space Station (ISS) will take place. Continuous operation, using the call
sign RS0ISS, is expected to start at 1000 UT on Saturday, April 11 to
commemorate the anniversary of the first human spaceflight by *Yuri
Gagarin* which
took place on April 12, 1961. Previous SSTV sessions have run for two days.
[image: ISS SSTV image 9/12 received by Martin Ehrenfried G8JNJ using the
SUWS WebSDR on Dec 18, 2014]
<https://ukamsat.files.wordpress.com/2014/12/iss-sstv-martin-ehrenfried-g8jnj-using-suws-websdr-2014-12-18.png>

ISS SSTV image 9/12 received by Martin Ehrenfried G8JNJ using the SUWS
WebSDR on Dec 18, 2014

Twelve different images will be sent on*145.800 MHz FM* using the SSTV
<http://www.essexham.co.uk/sstv-the-basics> mode PD180, with a 3-minute off
time between transmissions.

One of the photos shows the commemorative diploma created by PZK, the
national Polish Amateur Radio society, on the occasion of the 80th
anniversary of the birth of first cosmonaut Yuri Gagarin.

The equipment used will be the Kenwood D710 transceiver located in the
Russian Service Module. It is thought the equipment may be producing about
25 watts output which should provide a very strong signal.

Plans are being discussed for transmitting new images from space
enthusiasts around the world in the coming months. Additional details will
be released.

The images received by amateurs world-wide during previous transmissions
can be seen athttp://www.spaceflightsoftware.com/ARISS_SSTV/ and you are
invited to upload any pictures you receive during the upcoming
transmissions.

In the UK newspaper the Daily Mail, *Jonathan O’Callaghan* wrote about how
22-year-old *Radek Karwacki*, an AMSAT-UK member, received pictures from
the ISS using a £10 ($15) RTL-SDR dongle and a dipole antenna, see
http://amsat-uk.org/2015/02/04/iss-sstv-in-uk-press/
[image: International Space Station - Image Credit NASA]
<https://ukamsat.files.wordpress.com/2013/12/international-space-station-iss-2011.jpg>

International Space Station – Image Credit NASA

All you need to do to receive SSTV pictures direct from the space station
is to connect the audio output of a scanner or amateur radio transceiver
via a simple interface to the soundcard on a Windows PC or an Apple iOS
device, and tune in to 145.800 MHz FM. You can even receive pictures by
holding an iPhone next to the radio loudspeaker.

On Windows PC’s the free applicationMMSSTV
<http://hamsoft.ca/pages/mmsstv.php> can be used to decode the signal, on
Apple iOS devices you can use the SSTV app
<https://itunes.apple.com/gb/app/sstv/id387910013> for compatible modes.
(Note: see comments below about MMSSTV clock adjustments which may be
needed to reduce picture slant)

The ISS puts out a strong signal on 145.800 MHz FM and a 2m handheld with a
1/4 wave antenna will be enough to receive it. The FM transmission uses 5
kHz deviation which is standard in much of the world apart from the British
Isles and Europe where 2.5 kHz deviation is more common.

Many FM rigs can be switched been wide and narrow deviation FM filters. For
best results you should select the wider deviation filters. Handhelds all
seem to have a single wide filter fitted as standard.

The ISS Fan Club <http://www.issfanclub.com/> website will show you when
the space station is in range.
[image: ISS SSTV image 12/12 received by Martin Ehrenfried G8JNJ using the
SUWS WebSDR Dec 18, 2014]
<https://ukamsat.files.wordpress.com/2014/12/iss-sstv-12-martin-ehrenfried-g8jnj-using-suws-websdr-2014-12-18.png>

ISS SSTV image 12/12 received by Martin Ehrenfried G8JNJ using the SUWS
WebSDR Dec 18, 2014

*Paul Turner G4IJE*, co-developer of the SSTV PD modes, says regarding the
MMSSTV <http://hamsoft.ca/pages/mmsstv.php> PD180 mode: *“Don’t forget to
either enable “Always show RX viewer� or use the “Picture viewer�
(magnifying glass icon) to show the picture at its real resolution of 640 x
496. If you just view as normal you will only see 320 x 248 resolution,
which kind of defeats the object of using a high resolution mode.�*

On the AMSAT-BB *Rick W2JAZ* and *Alan WA4SCA* comment on the need to set
the MMSSTV sound card setting to 48 kHz instead of the default 44.100 kHz
• Options
• Setup
• Misc
• Then the Clock section at the bottom of the page

The MMSSTV default setting may need to be set to 24000 (exactly half of the
sound card setting). You then should get good clean images.

The sound card adjustments will vary slightly depending on the version of
the OS you are running, but usually will be under the advanced properties
for the device. You can probably use a higher sampling rate for the sound
card so long as it is a power of 2 multiple (2,4,8, etc) of the value in
MMSSTV. For instance 192k (8x) has no issues. The same applies to most
similar software.

You can receive the SSTV transmissions online using the SUWS WebSDR
<http://websdr.suws.org.uk/> remote receiver located near London along with
the MMSSTV software
http://amsat-uk.org/2014/08/15/suws-websdr-moves-to-new-site/

ISS Fan Club – Tracking / Predictions http://www.issfanclub.com/

Free MMSSTV Slow Scan TV software http://hamsoft.ca/pages/mmsstv.php

iOS SSTV App https://itunes.apple.com/gb/app/sstv/id387910013

For more on Slow Scan Television SSTV, see this article SSTV – The Basics
http://www.essexham.co.uk/sstv-the-basics

How to be successful with the ISS Slow Scan Television (SSTV) imaging system
http://www.marexmg.org/fileshtml/howtoisssstv.html

IZ8BLY Vox Recoder, enables you to record the signals from the ISS on
145.800 MHz while you’re away at work
http://antoninoporcino.xoom.it/VoxRecorder/

ARISS Slow Scan TV (SSTV) Blog and Gallery http://ariss-sstv.blogspot.co.uk/

Information on the MAI-75 SSTV experiment
http://www.energia.ru/eng/iss/researches/education-26.html

Video showing reception of SSTV using the FUNcube Dongle Pro SDR and
SDR-RADIO going into Virtual Audio Cable (VAC) then to MMSSTV software
https://www.youtube.com/watch?v=K6MOrX9iZCk

ISS SSTV received online with SUWS WebSDR
http://amsat-uk.org/2014/09/06/iss-sstv-on-suws-websdr/
[image: ISS SSTV 1/12 received by Martin Ehrenfried G8JNJ using the SUWS
WebSDR Dec 18, 2014]
<https://ukamsat.files.wordpress.com/2014/12/iss-sstv-1-martin-ehrenfried-g8jnj-using-suws-websdr-2014-12-18.png>

ISS SSTV 1/12 received by Martin Ehrenfried G8JNJ using the SUWS WebSDR Dec
18, 2014


​Fonte Info:
http://amsat-uk.org/2015/03/31/iss-sstv/

​
--
73 e Obrigado
Carlos Nora, CT1END
NNNN

*​REP#729*
*GPDX#20*
*QTHLoc IM58is*


*O meu passatempo é ser Radioamador !*
*My hobby is amateur radio !*
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