SpaceCam planed for July 15-16 By Miles Mann WF1F
MAREX-MG News www.marexmg.org
Manned Amateur Radio Experiment
Notes from the Ariss blog http://ariss-sstv.blogspot.com/
Tips for Working Slow Scan TV:
Yes! SpaceCam1 will transmit and receive images on amateur radio frequencies, using standard SSTV formats. Although SpaceCam1 is capable of operating in several modes, the recommended format while in Slide Show mode is Robot 36. This format offers the best standard compromise between image quality and transmission time and heat stress.
In addition to two-way "interactive" operation, SpaceCam1 provides the following fully automatic functions:
-- Transmission from a live camera or disk at specified intervals
-- “Slide Show" operation from a set of images stored on the system
-- SSTV Repeater
What equipment will I need to receive the images?
Radio receiver with an outdoor antenna. The radio receive will need to be able to receive FM signals on 145.800 MHz radio band. A PC with SSTV software or a dedicated SSTV scan converter.
For information on how to receive SSTV images from the International Space station, check out the MAREX link: http://www.marexmg.org/fileshtml/howtouseiss.html
Over the next few weeks we maybe receiving images from the International Space station via Slow Scan TV (SSTV). The MAREX team will be collecting these images from the amateur Radio and SWL community and we will post the best.
We would like to collect all images received. However in order to properly catalog the images we request you use the following image naming format. After you receive you images; please rename the images using the following format, All Lower case letters
Year 06, Month 07, Day 31, (UTC time), Call sign, Short text description, .JPG
New format: 0607311905wf1f.jpg
I removed the first two numbers of the year and the “Z” for UTC time. All dates are assumed to be in UTC dates. The images coming down from ISS will also have a time stamp embedded into the image. You can also use these numbers to generate you file names. If you are a Short Wave listener and do not have a call sign, just place your Initials after the time (0607311905abc.jpg)
If we break this down
Month = 07
Day = 31
Time = 1905 UTC
Call sign = wf1f
Description (optional) = Windows shot
Image format = jpg
Please do not put any text over lays on the images, Example, do not put web page or advertisements in the image. Your own call sign and date are acceptable.
Send all images directly to MAREX at Marexmg@comcast.net
We would also like to know the following information in your email.
Name or Call sign
Country / State
Software decoding tool
Elevation or range of ISS when you decoded the image.
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 involvement. The SpaceCam project will be able to transmit over 200 SSTV images per day (Robot 36 format).
Ariss has not announced any plans for a SSTV Uplink frequency.
SSTV Decoding Software http://www.barberdsp.com/
There are many choices in SSTV software, some Free, others with more features cost a few bucks. http://www.marexmg.org/fileshtml/sstvlinkpage.html
So have fun, find your best setup and start practicing (on Earth) how to decode SSTV on 2-meters.
Marexmg Web page
ARISS Web page and other great Space projects
73 Miles WF1F MAREX-MG