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Faster mtotdev() and htotdev()

The AllanTools functions mtotdev() and htotdev() are now almost 10-times faster, after an update to the code that more efficiently calculates moving averages.

The old code used numpy.mean() for each iteration of a loop:

However this can be computed much faster by noticing that the new mean differs from the old (already computed!) mean by just two points, one at the start is dropped, and a new one at the end is added:

Kangasala Jukola 2019 - 2nd stage

No major mistakes but slow going on the 2nd stage of Jukola this year.

The not-so-dramatic errors were: #2 has a 90-degree wiggle just before the control - my route to #7 was OK but very slow through the green/tick aprts - then no worries until #15 where the 'safe' choice along the road was no good at all - finally a bit of a Z-bend into #17.

Lab live-stream: Trapped 88Sr+ ion

Live-stream from the VTT MIKES ion clock lab.

We started trapping in this 2nd-generation VTT MIKES ion trap in early May and we are now working with characterizing the trap and laser cooling. Hopefully the ion stays in the trap for several days!

Itärastit Paloheinä

Hot weather +27C maybe and not much wind.

A bit of a loop around #2 - otherwise fairly steady going.

Paloheinä 7km

Fairly easy course in Palhoneinä.

retro-orienteering Solvalla

1:15000 map with hand-drawn controls, and old-school punching on paper (no EMIT). A bit of rain and +11 C or so.

Firmaliiga Rinnekoti

Major problems finding #3 and then also out of #3 towards the road...

Itärastit Latokaski - fail

A loop around #3, where the yellow 'channel' wasn't very clear or easy to recognize.

Then punched at the wrong control on #7 🙁

Next stop is firmaliiga on Tuesday.

Thursday Trapping

Single-ion Sr+ trap.

Firmaliiga Solvalla

Stepped off the path towards #1 too soon and circled around the wrong hill, probably costing +2 minutes or so.

#5 is also a bad split - the plan was to use the paths and not go down to the lake - but bad execution resulted in a visit to the lake and slow climbing back up to the control.

#9 is not stellar, perhaps due to lack of fitness, or slowing down and reading the map too often on the long(ish) open leg.

19./88 overall is OK - would have been better without these three mistakes 😉

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