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Mad Scientess Jane Expat

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Scientific Space Instrument Design [20151105|15:48]
Mad Scientess Jane Expat
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[the weather today is |stressed]
[with a hint of |purring cat]


[Block diagram of a "generic" space instrument.]

I'm giving a talk next week* and I needed a block diagram of a generic spacecraft instrument. I made one many moons ago but it looks verry dated now and is also about 400x300 pixels and I can't find the original graphics program file. So I thought, I'll make myself a new one.

I'll probably talk about the slide it's on for a minute and a half, maybe two. I probably shouldn't have spent two hours on this. I'm now trying to justify the time spent to myself by sharing it with the internet. Hi, internet!

If you're wondering what this is, it shows how a set of sensors that measure physical parameters in space (on the right in green, labeled MAGOBS and MAGIBS) are connected to a spacecraft (on the left in gold). The physical parameter, in the case of these two sensors, is the ambient magnetic field.

The FEEs transform the physical parameters measured by the sensors into electrical signals.

The ICU is the instrument control unit, which takes telecommands (TCs) and timing signals from the spacecraft and passes them to the sensors. It also takes the data passed back from the front-end electronics (FEEs) and turns it into nice telemetry packets (TMs) that the spacecraft can then package up and beam to Earth through its communications system.

The PCU is the power converter unit, which takes the standard voltage from the spacecraft (usually +28 Volts) and chops it up into secondary voltages that the instrument FEEs can use (e.g. +/- 1.5 Volts)

It all looks very simple, no? You wouldn't think this sort of thing would take a dozen years or so to implement and launch would you? Sadly, you would be wrong about that.

* And two the week after that. They are all different. Whyyyy did I think it would be a good idea to sign up to give a group meeting when I already knew I had another two talks to give? /o\

This entry was originally posted at http://nanila.dreamwidth.org/996062.html. The titration count is at comment count unavailable.0 pKa.
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Comments:
[User Picture]From: cosmiccircus
2015-11-06 01:31 (UTC)
If you're not feeling very comfortable with it, just add a few lines and acronyms in - no one will know and we won't tell!
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[User Picture]From: nanila
2015-11-11 21:21 (UTC)
Ahaha. I had text on the slide explaining all the acronyms. Not sure anyone retained it, necessarily, but no one's eyes glazed over either, so I'm calling it a win. :P
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[User Picture]From: mysterysquid
2015-11-06 07:46 (UTC)
Neat! And you'll be able to reuse it.
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[User Picture]From: nanila
2015-11-11 21:21 (UTC)
Definitely. I'm planning to reuse it in outreach talks!
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[User Picture]From: jixel
2015-11-06 10:09 (UTC)
Seriously whats up with big agencies and acronyms! Even the names.. e.g. The icu could just be called the controller...

funny names magobs n magibs.. Tweedle dee dummish!
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[User Picture]From: nanila
2015-11-11 21:22 (UTC)
My favourite acronym of ours at the moment is "MAGFLU". Makes it sound like the instrument is feeling sorry for itself after a night out. ;)
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