Argent Data makes a small SSTV camera about 1.5" cube for under $100. For all practical purposes it is a modern replacement for the original Kenwood VC-H1 SSTV handheld. He makes them for balloons etc.
We have one on a model satellite hanging out in our lobby and anyone can trigger it with any FRS radio with the right channel and tone, and then they can also receive and display the picture on any laptop with SSTV software on it by just letting the laptop's mic hear the FRS radio speaker.
The intent of this "spysat" in the lobby was so we could see when someone was having a reception out there and there might be free food.
Bob, WB4APR
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Graham Shirville Sent: Friday, September 07, 2012 4:39 PM To: Simon HB9DRV; 'AMSAT BB' Subject: [amsat-bb] Re: Fw: Digital Slow Scan in space
Hi Simon,
Good question - "medium" was a deliberately vague term as it will also depend on the camera and available data rates etc.
I was hoping we might be able to move on from analogue SSTV now.. we should be able to achieve much better quality images,,,as you suggest the challenge would be to do the digital encoding on board the spacecraft without using lots of power but, as mentioned, - if they can do it on a tiny payload hanging beneath a small helium balloon then it should be possible to do something similar on a spacecraft even a 1U cubesat!
73
Graham G3VZV
-----Original Message----- From: Simon HB9DRV Sent: Friday, September 07, 2012 2:13 PM To: 'Graham Shirville' ; 'AMSAT BB' Subject: [amsat-bb] Re: Fw: Digital Slow Scan in space
Graham,
What's 'medium resolution' ? Standard SSTV is not digital, it's analogous with the (now no longer used) analogue TV. There is true digital SSTV used on 80m and 40m and (I guess) other bands, from memory this is EasyPal; to implement this in a satellite would be a long and tedious task.
Implementing one of the analogue SSTV modes would be easier - much easier - but quality is nowhere as good.
Simon Brown, HB9DRV http://sdr-radio.com
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Graham Shirville
We are looking for a practical system to use on a 1U, or perhaps 2U, cubesat to take medium definition images and transmit them to the ground on VHF for educational outreach purposes.
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_______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb