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Re: Re: flash memory on orbit



Hi,

we used Flash Memory on P3-D/AO-40 on the IHU-2 and other devices 
without any problems after almost 4 years.

Regarding notebooks etc...  I don't think that this has anything to do 
with the altitude, but rather the way how the
equipment is checked when you enter the departure gate?

73s Peter, DB2OS



Achim Vollhardt wrote:

> Hi Nick,
> some problems here, which I don't find adressed by the other replyants:
>
> 1. polar orbit.. you will cross the South Atlantic Anomaly (SAA) zone 
> twice a day.. look at it like a hole in the earths magnetic shield.. 
> spacewalks are planned not being in the SAA, so it is quite an effect.
>
> 2. 800km ist substantially higher than 30000ft.. just as a note: over 
> 1000 km radiation jumps up:
>
> http://www.cubesat.auc.dk/documents/Space_Environment.pdf
>
> 3. single event upset happens on a statistical basis.. the avverage 
> rate can be calculated, but it may happen on the very first orbit, so 
> you have to make sure, that a single event upset is not shutting down 
> your system indefinetely.
>
> 73s Achim, DH2VA
> ----
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