Re: Hitomi obs, 4 April 2016, 0148 UT. Falcon, CO USA

From: Björn Gimle via Seesat-l <seesat-l_at_satobs.org>
Date: Mon, 4 Apr 2016 11:57:04 +0200
Do NOT time at regular intervals. That way you will only get one period or
integer fractions or multiples thereof, unless you do careful arithmetic. A
graphic method helps you detect asymmetries, synodic effects and
irregularities.

Instead, plot the accumulated lap times MODULO trial periods (easier and
less error prone if your watch can show these directly).
I have a program that allows you to tweak the residuals to a horizontal
line (ideal case), multiple parallel lines (sub-periods or asymmetric
secondary flashes) or even divergent lines (synodic).
When the best sub-period (and offset) has been found the scale is magnified
so the smallest variations, asymmetries, and accurate period can be seen.

Of course it is very easy to write a spreadsheet for the same computation.

/Björn Gimle

Den 4 apr 2016 05:40 skrev "ronlee--- via Seesat-l" <seesat-l_at_satobs.org>:
>
> ...
> My technique is to click the stopwatch every two sets of
> flashes.  If I miss, I go to four sets.  This yields
> around 5.2 or 10.4 seconds.  2 into 5.2 seconds is 2.6 seconds
> as my math over a reasonable set of flashes works out to.
>
> What I do not understand is how I am getting 2.6 seconds
> ...
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Received on Mon Apr 04 2016 - 04:57:52 UTC

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