[amsat-bb] Re: AO-51 repeater back in operation

[Andrew Rich]

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 at tech-software.net
web: www.tech-software.net
----- Original Message ----- 
From: "Mark L. Hammond" <marklhammond at gmail.com>
To: <amsat-bb at amsat.org>; <vk4tec at 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 at 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 at tech-software.net
> web: www.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.
>>
>> 73,
>> Gould, WA4SXM for the Command Team
>
>
> Mark L. Hammond  [N8MH]
>


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