[Date Prev][Date Next][Thread Prev][Thread Next] - [Date Index][Thread Index][Author Index]

SSTV update ISS Oct 6 2005

ISS Amateur Radio Status: October 6, 2005

Slow Scan TV on ISS update

By Miles Mann WF1F,

MAREX-MG News	www.marexmg.org

Manned Amateur Radio Experiment

Hi everyone. 

There are currently two projects on board the
International Space Station that will support Slow
Scan TV (SSTV).  These project are called SuitSat and
SpaceCam.  The SuitSat project may be activated in
December 2005 and SpaceCam in 2006 (all dates are
subject to change without notice).  The goal of this
series of memos is to get the world ready to start
decoding SSTV images from Space.

Here is an excerpt from a AMSAT NEWS SERVICE, ANS-261
Sept 18.

The Suitsat amateur radio system, coupled with a
school artwork project, is 
planned to be installed in an outdated Russian Orlon
spacesuit.  It will 
then be deployed from the ISS during an Extra
Vehicular Activity (EVA, or 
spacewalk).  This is expected to occur in the December
timeframe by the 
Expedition 12 crew.  The Suitsat amateur radio system
will beam down 
special messages and an SSTV image from within the
Orlon space suit as it 
floats in space.  Suitsat radio system will allow hams
and students to 
track the suit and decode special international
messages, space suit 
telemetry, and a pre-programmed Slow Scan TV image
through its 
specially-built digital voice messaging system and
amateur radio 
transmitter.  As built, Suitsat will be a
transmit-only capability that 
will run on the space suit's battery power.



The SuitSat project will run on batteries for 2 to 8
weeks, while it free floats in orbit as its own
satellite.  The SuitSat will be driven by a Kenwood
TH-K2 transceiver and a timing controller box.  The
controller will transmit a series of voice messages,
telemetry and one Slow Scan TV image (Robot 36
format)..  The whole series of messages and image is
approximately 9 minutes long, and then it repeats.

The SpaceCam project will also send SSTV images from
ISS, however it will be mounted Inside the ISS and
will be running for several weeks at a time and will
be able to transmit over 400 SSTV images per day
(Robot 36 format).

How to Decode SSTV from Space:
I am still working on this section and ill post an
updated web page link soon.
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 http://www.barberdsp.com/ or similar

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

Tip on working ISS on Voice and packet

Marexmg Web page

Information on the crew's activities aboard the Space
Station, future launch dates, as well as Station
sighting opportunities from anywhere on the Earth, is
available on the Internet at: 


73 Miles WF1F MAREX-MG

Until we meet again

Via the sarex mailing list at AMSAT.ORG courtesy of AMSAT-NA.
To unsubscribe, send "unsubscribe sarex" to Majordomo@amsat.org