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The U.S. space agency NASA on Thursday confirmed it had discovered the apparent sabotage of a noncritical component of the international space station due to be carried up by the space shuttle Endeavour. It launched an investigation after finding cut wires in a piece of computer equipment intended to transfer data from station sensors to the ground, the agency said.
Originally posted by V Kaminski
The system is by a company called INVOCON INC out of Conroe Texas, it's is called an External Wireless Instrumentation System or EWIS, the specific "box" tampered with is called an EWIS NCU or Network Control Unit.
No MSM' have this data online yet. They were content to ask NASA and get no answer. But this is ATS! Membership has it's privileges. We perform the very difficult immediately, the impossible takes only a moment or two longer.
Here's a link to the company who may or may not employ further sub-contractors, Invocon Inc. There's pics and a description of the EWIS NCU which is to be delivered to ISS on STS-118. Launch date Aug 7th 7:02PM EDT nominally.
OK. So what does an EWIS NCU do? Not much really. Got a wireless router? "Like" that in simplest terms.
It's like a "hub" or "switch" that takes strain and vibration data from the various spots on the P5 truss and collects and then sends that data wirelessly en mass to the avionics system and down to the ground when Ku band is available.
These strain guages measure "induced moment" and the avionics sytem discerns "how much" moment and can adjust attitude accoordingly using either the ISS CMG's (Control Moment Gyros), ISS RCS (Reaction Control System) thrusters or Soyez or Progress RCS and when docked STS RCS.
If and when they get it all "combed" and scrubbed it will be pretty complicated.
The box that was "sabotaged" and it's spare are these EWIS NCU modules.
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