raptop changed the topic of #kspacademia to: https://gist.github.com/pdn4kd/164b9b85435d87afbec0c3a7e69d3e6d | Dogs are cats. Spiders are cat interferometers. | Космизм сегодня! | Document well, for tomorrow you may get mauled by a ネコバス. | <UmbralRaptor> egg|nomz|egg: generally if your eyes are dewing over, that's not the weather. | <ferram4> I shall beat my problems to death with an engineer. | We can haz pdf
<mofh>
20:36:26 <@egg> mofh: I can have a MeasurementResult<T> that's a measured value T and a standard uncertainty Difference<T>, but what is this dispersion?
<egg|cell|egg>
Meow
<mofh>
isn't this just a variance in the standard uncertainty?
<egg|cell|egg>
What do you mean
<mofh>
Hrm. Actually let me think carefully about that first.
* egg|cell|egg
bites mofh
<mofh>
ow
<mofh>
like this is trickier than it seems at first glance, okay,
* egg
meows loudly at mofh
<mofh>
hm. it feels like the dispersion of that should be something obvious, like a higher moment but I'm actually not sure atm.
<egg>
mofh: surely it can't directly be that
<egg>
mofh: if you get more samples, the uncertainty on the mean will go down
<egg>
mofh: but the distribution of the values doesn't get narrower because you sample more of it
<egg>
mofh: should, say, the nth percentile of the distance to the mean be itself a measurement result?
<egg>
how would it be computed, and how would its uncertainty be computed and how would it correlate to the uncertainty on the mean
* egg
bites mofh
<egg>
B787_300: mofh: why does GPS use a semisynch orbit instead of a near-semisynch orbit phased on much longer like ГЛОНАСС, Galileo, or 北斗? longer phasing requires much less stationkeeping
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<B787_300>
egg: no idea
<B787_300>
maybe to make the math of orbits easier and easier bounding if a sat starts to drift?
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<egg|work|egg>
I suppose
<egg|work|egg>
B787_300: yeah I guess it makes writing receivers easier
<egg|work|egg>
"Unhindered by military-threat requirements, Galileo satellites will forgo nuclear hardening, will not carry a nuclear-detonation-detection payload, and do not require a six-month autonomous operational capability."
<egg|work|egg>
also interesting points in that document about the higher galileo inclination being better for nordic countries
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* egg|work|egg
bites mofh
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<mofh>
08:15:57 <@egg> mofh: but the distribution of the values doesn't get narrower because you sample more of it
<mofh>
point.
<mofh>
08:16:47 <@egg> mofh: should, say, the nth percentile of the distance to the mean be itself a measurement result?
<mofh>
i mean, that is an approach that i think would give *something*, i'm just not sure if it's a reasonable way to go about things
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<egg|cell|egg>
Why
<egg|cell|egg>
Also how
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* egg
meows at mofh
<mofh>
egg: just a moment, bad headache making it really hard to think right now
<galois>
[WIKIPEDIA] Ubu | "François Ubu, dit le Père Ubu, est un personnage de fiction créé par l’écrivain français Alfred Jarry. Capitaine de dragons, officier de confiance du roi Venceslas, décoré de l’ordre de l’Aigle rouge de Pologne, ancien roi d’Aragon, comte de Sandomir ; puis roi de Pologne, docteur en pataphysique, et..."
<egg>
there are OMMs here, but after the 15th of January 1996 it's happily cruising along without OMMs, you can see what sort of mess the time series can look like