[amsat-bb] Re: Fw: Digital Slow Scan in space
g.shirville at btinternet.com
Fri Sep 7 13:38:31 PDT 2012
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!
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
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
From: amsat-bb-bounces at amsat.org [mailto:amsat-bb-bounces at amsat.org] 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.
Sent via AMSAT-BB at amsat.org. Opinions expressed are those of the author.
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