[amsat-bb] Re: AO-51 repeater back in operation
Mark L. Hammond
marklhammond at gmail.com
Sun Sep 13 15:56:28 PDT 2009
AO-51 is essentially a "next generation" PACSAT. Each craft runs its own OS, which are all similar. Google Harold Price NK6K and you'll find this link: http://www.amsat.org/amsat/sats/nk6k/msatmain.html It gives a few important tidbits so you can see the general picture of satellites, OS, file systems, etc.
The size of the upload depends on the satellite; usually there are multiple files, and their sizes vary. In the end, it's something under 1MB in total. Each piece of code adds more functions. So, it's a flying computer with CPU and memory and the OS and applications have to be uploaded and started...not a foreign concept for anybody that has installed an application!
Most satellites these days will probably use a the 9600 baud "standard" data rate for uploading.
When you only get a few minutes to upload/test just a few times each day, it takes a while to pull the whole thing off using a 9600 baud RF connection.
The good news is that Gould is really good at it :)
Re: AO-51 repeater back in operation
Subject: [amsat-bb] Re: AO-51 repeater back in operation
From: "Andrew Rich" <vk4tec at xxxxxxxxxxxxxxxxx>
Date: Mon, 14 Sep 2009 01:22:11 +1000
Could you explain a bit about the software load
How much you have to upload
data rates ?
Airways Technical Officer Grade 4
Surveillance - RADAR ADS-B
Amateur Radio Callsign VK4TEC
email: vk4tec at tech-software.net
----- Original Message -----
From: "Gould Smith" <gouldsmi at bellsouth.net>
To: <amsat-bb at amsat.org>
Sent: Monday, September 14, 2009 1:13 AM
Subject: [amsat-bb] AO-51 repeater back in operation
>I turned on the main AO-51 repeater this morning (145.92/435.300). The
>software reload continues, the software could crash when the last two tasks
>are loaded and activated.
> Gould, WA4SXM for the Command Team
Mark L. Hammond [N8MH]
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