[amsat-bb] Will the power issues on the ISS affect the ARISS station?

J. Boyd (JR2TTS) the2belo at msd.biglobe.ne.jp
Wed Nov 18 04:39:29 UTC 2015

On Tue, 17 Nov 2015 23:30:37 -0500, "Daniel J. Grinkevich" <danielgrinkevich at gmail.com> wrote:

> It looks like they have everything still on full power.
> *On Friday afternoon (11:55 am Houston Time), power channel 1B experienced
> an electrical event that telemetry points to a fault in the power channel’s
> Sequential Shunt Unit [SSU]. An SSU is responsible for regulating the power
> voltage levels generated by the solar arrays before it is passed to systems
> downstream,” NASA’s Dan Hout told SpaceFlight Insider. “A seamless power
> transfer was performed to recover loads from channel 1B to channel 1A.
> Currently operating on seven of eight power channels, no impact to station
> systems or operations. Crew was never in any danger.*
> Source:
> http://www.spaceflightinsider.com/missions/iss/iss-encounters-power-failure-cant-be-fixed-until-2016/

And knowing the redundancy likely built into manned spacecraft systems
like the ISS, they could probably run the entire station on as few as
three channels.

J. Boyd, JR2TTS/NI3B
the2belo at msd.biglobe.ne.jp
Twitter: @Minus2_C

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