Hi Andrew, At 10:03 AM 9/14/2009 +1000, Andrew Rich wrote: >What are the implications of not getting the upload to work ?
The satellite won't work ;) That's a broad question. If the satellite is healthy hardware-wise, an upload would be re-attempted (multiple times you can be sure). If the uploads don't work--it's time to debug and determine why the uploads aren't working, etc. >Is there standby memory you check and then swap to the working program ? In theory, if specific memory locations become useless, they might be programmed around. But life is probably not so simple! 73, Mark N8MH >---------------------------------------------------------- >Andrew Rich >Airways Technical Officer Grade 4 >Surveillance - RADAR ADS-B >Amateur Radio Callsign VK4TEC >email: [email protected] >web: www.tech-software.net >----- Original Message ----- From: "Mark L. Hammond" <[email protected]> >To: <[email protected]>; <[email protected]> >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" <vk4...@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: [email protected] >>web: www.tech-software.net >>----- Original Message ----- From: "Gould Smith" <[email protected]> >>To: <[email protected]> >>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] > > >-------------------------------------------------------------------------------- > > > >No virus found in this incoming message. >Checked by AVG - www.avg.com >Version: 8.5.409 / Virus Database: 270.13.95/2368 - Release Date: 09/13/09 >17:50:00 Mark L. Hammond [N8MH] _______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
