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Marex SSTV stat Aug 2

ISS Amateur Radio Status: August 2, 2006

Slow Scan TV on ISS update

By Miles Mann WF1F,

MAREX-MG News	www.marexmg.org

Manned Amateur Radio Experiment

Hi everyone. 

Last Friday and Saturday ISS Expedition 13 Commander
Pavel Vinogradov activated the SSTV project for few
orbits from the International Space Station.  Pavel
sent several manual test images from ISS to Earth. 
The testing proved that he had the entire basic
configuration set up correctly.  The SSTV system was
then shut down until he can spend more time to
finalize the cables connections and configure the
system for Slide Show mode.

The Marex SpaceCam1 software contains a feature called
“Slide Show” mode.  It allows the crew to preload a
directory full of images that will be automatically
transmitted to Earth.  The crew will not need to keep
pushing a button to send images.    In theory the
system can run for weeks at a time without crew

On Tuesday the ARISS and MAREX teams worked together
to review and agree upon the best settings for the
next phase of testing which should include the “Slide
Show” mode.  The SSTV configuration parameters were
then sent to ARISS in Moscow to be uploaded to Pavel
on ISS.

The next phase of testing may use the frequency
145.800 MHz FM for the SSTV down link.  You should
also check 144.490 just in chase.  The Slide Show mode
will only be testing the Down link.  The uplink
frequency will not be published.

The SpaceCam project will be able to transmit over 400
SSTV images per day (Robot 36 format).

How to Decode SSTV from Space:
All SSTV transmissions will be in FM mode and will
most likely be on the 2-meter band.
This means that the Doppler frequency drift will not
be much of a problem and you will be able to use your
existing 2-meter station or a police scanner to hear
and decode the signals from ISS.

If you have already have been successful in working
the Packet station or talked to the ISS crew on
2-meter voice, than you already have most of what you
What’s left is to connect your computer to the speaker
of your radio and some SSTV decoding software, such as
ChromaPix or similar software.

There are many choices in SSTV software, some Free,
others with more features cost a few bucks.  

So have fun, find your best setup and start practicing
how to decode SSTV on 2-meters.

Location of Hardware on ISS
This link will show you images of some of the amateur
radio hardware already installed on ISS

Marexmg Web page

73 Miles WF1F MAREX-MG

Until we meet again


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