What are the implications of not getting the upload to work ?
Is there standby memory you check and then swap to the working program ?
---------------------------------------------------------- Andrew Rich Airways Technical Officer Grade 4 Surveillance - RADAR ADS-B Amateur Radio Callsign VK4TEC email: vk4tec@tech-software.net web: www.tech-software.net ----- Original Message ----- From: "Mark L. Hammond" marklhammond@gmail.com To: amsat-bb@amsat.org; vk4tec@tech-software.net Sent: Monday, September 14, 2009 8:56 AM Subject: Re: [amsat-bb] AO-51 repeater back in operation
Hi Andrew,
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 :)
73,
Mark N8MH
Re: AO-51 repeater back in operation
Subject: [amsat-bb] Re: AO-51 repeater back in operation From: "Andrew Rich" vk4tec@xxxxxxxxxxxxxxxxx Date: Mon, 14 Sep 2009 01:22:11 +1000
Could you explain a bit about the software load
Operating system
How much you have to upload
data rates ?
Andrew Rich Airways Technical Officer Grade 4 Surveillance - RADAR ADS-B Amateur Radio Callsign VK4TEC email: vk4tec@tech-software.net web: www.tech-software.net ----- Original Message ----- From: "Gould Smith" gouldsmi@bellsouth.net To: amsat-bb@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.
73, Gould, WA4SXM for the Command Team
Mark L. Hammond [N8MH]
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