[amsat-bb] Re: Fw: Digital Slow Scan in space

Graham Shirville g.shirville at btinternet.com
Fri Sep 7 13:38:31 PDT 2012

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!



-----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


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

-----Original Message-----
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.

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