Re: tumbling rocket and satellite

From: Marco Langbroek via Seesat-l <>
Date: Mon, 22 Apr 2019 21:59:04 +0200
Op 22-4-2019 om 14:50 schreef Leo Barhorst via Seesat-l:

> For me it will be necessary to get the magnitude from the stacked frames.
> I now make a best gues of the period. Would be much more work to
> measure all the individual
> maxima.
> Will contact Cees bassa about this, as he is the develloper of Sattools.

LiMovie software for me is the software to measure frame-to-frame brightness
variation in video data. And there is good and free curve fitting software
nowadays that can help to find periodicities in video photometry with great

I have been doing brightness variation studies on classified objects of
interest, but never knew quite how to report them. The drawback of the old PPAS
format was that it was heavily geared towards traditional visual observations,
and I never knew how to  report my photographic and video brightness measurement
variations in the format. If the format can be adapted to better report
brightness periods derived from video and photography, I will certainly start to
use it.

Now the age of punch cards is long behind us and data formats are no longer
restricted to 80-character lines, perhaps time to devise a more human-readable

- Marco

Dr Marco Langbroek  -  SatTrackCam Leiden, the Netherlands.

Cospar 4353 (Leiden):     52.15412 N, 4.49081 E (WGS84), +0 m ASL
Cospar 4355 (Cronesteyn): 52.13878 N, 4.49937 E (WGS84), -2 m ASL
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Twitter: _at_Marco_Langbroek
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Received on Mon Apr 22 2019 - 15:00:04 UTC

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