Re: [amsat-bb] question for the experts

["Richard D. Burgan" <wc8j@xxxxxxxx>]

Douglas,

Your question is a good one.  According to the AMSAT bulletins the IHU-2 was
suffering from radiation caused memory (upsets) corruption.  In fact the IHU-2 had
to be rebooted three times (??).  It was running a work around program to repeat the
telemetry onto the 145 MHz downlink.  I looked for information on solar activity
with similar thoughts to yours.  We are near "solar max" as you know.  Here are two
web sites that have good information:  http://www.sec.noaa.gov/ace/ and
http://www.spaceweather.com  Both of them have good information.  I could not find a
specific event the happened at the same time as AO-40 went off the air.

Happy Holidays!
73's de Rich Burgan, WC8J
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Douglas Cole wrote:

> I guess I will break my silence on this and ask a question that has been bugging
> me and hopefully those that are more knowledgeable will be able to answer for me
> .
>
> As I seem to recall in my surfing ( does anyone do that anymore ) around on the
> web that I came up with some info about a rather large CME event ( coronal mass
> ejection ) that ended up coming right at good 'ole planet earth , this one
> seemed to be one that caught the eye of a lot of scientists , or at least it
> made the rounds on the web , as I found a website , which I have since lost ,
> that had full length .mpeg movies in the different spectral ranges of the CME
> event , quite the display and I was able to download the 32meg file (thanks to
> whoever invented DSL) for later playback .....
>
> Now this CME if I recall happened before AO-40 went silent , so my very big
> brain started doing what it likes to do , it thought about it over and over
> again and hoped that this big CME wouldn't raise hail and terror with our new
> 'sat ......
>
> My real question is this , as we have been talking about 'rad hardened chips and
> the like , how do satellites of any kind handle things like these CME events ? ,
> it would seem to me that these things could be of a much greater danger to any
> satellite than even leonids type damage ?  Is this something that has been a
> known but tolerable risk with satellites and could this possibly cause a
> corruption of data on any satellite ?
>
> Ok , now really I am not speculating as to what caused AO-40 to be in the shape
> it is in , but dangit , I had the desire to ask this on the very day that ao-40
> went silent , and felt real creepy to even try once I found that it did go
> silent , so here I am hoping that I won't get nuked for asking , I am really
> curious as to what if any effects these CME's have on things up there :^}
> They seem like such serious things , yet not much in the alarmist media is made
> of them ....
>
> tia
>
> Ok , I go now and run and hide ;^}
>
> --
> Douglas Cole   N7BFS
> AMSAT#26182 , K2 # 544
> Spokane IRLP node 145.250 owner
> http://www.users.qwest.net/~cdoug3
> Registered Linux user # 188922
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