[amsat-bb] Re: ARISSat-1 update
burns at fisher.cc
Thu Apr 21 16:45:02 PDT 2011
Thank you for keeping us up to date, Lou.
Is it a surprise that the battery was low? It appears (from Wikipedia) that
silver zinc batteries have a negligible self-discharge rate. If the
ARISSat-1 switches are off, should there be any drain? (I know from
previous updates that it is so far unknown whether the battery was actually
disconnected during storage).
73, Burns W2BFJ
On Thu, Apr 21, 2011 at 11:56 AM, <G0MRF at aol.com> wrote:
> This is an update on the ARISSat activities.
> We had a telecon with the ARISSat team in Russia. Here is the situation as
> described by them. The Russian suit battery that was intended to be used
> on ARISSat was used during testing both on the ground and onboard ISS when
> it first arrived. When it was tested prior to the planned April 12
> operation, it was discovered that the battery was low on charge.
> The suit battery's are specified for only five cycles of charge.
> It was decided to not recharge the battery at this time in order to keep
> the number of cycles as low as possible and thus saving the battery for the
> actual mission. That deployment is currently scheduled for July 26. We are
> still trying to get more information on the storage status and the battery
> health from the Russian team. We will keep you informed as we prepare for
> the eventual deployment of ARISSat.
> Lou McFadin
> ARISS US Hardware manager
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