Re: How to save a live surface plot profile?
Posted by
Thomas on
Apr 22, 2016; 12:39pm
URL: http://astroimagej.170.s1.nabble.com/How-to-save-a-live-surface-plot-profile-tp382p384.html
Karen
First thanks for the reply.
Here is what we are trying to get at . We are trying to come up with a straight forward simple way to estimate satellite flash rates to get the tumble rates from a video. What we have been trying to do is come up was a process that any amateur can used to get these rates. The issues does not seem to be limited to just the amateur satellite community for such use.
Let us give the example on Astro H which we have been working on. The people at satobs gave estimation of tumble rates at a little over 11 seconds most are visual estimatations.
Observation of the main A debris by the Subaru telescope got a tumble rate of a little over 5 seconds Then the Engineering Physics students at Embry-Riddle Aeronautical University 2.6 seconds
http://news.erau.edu/top-news/embry-riddle-students-track-and-observe-damaged-hitomi-x-ray-satellite-and-its-debris-with-optical-telescope#sthash.ndkiSkkM.VMMj1tga.dpufKaren if all these rates are to believed then Astro H, A debris has taken on an insane (violent) tumble rate, our as we like to call it the tumble of death.
The problem is we believe signs of the tumble of death were there on the 4-2-2016 from video of a pass we imaged. Video of this pass can be viewed and download here.
https://vimeo.com/163812902So Karen and others if you can help us come up with a way to figure tumble rates from video would be great. Two things to make this even harder is taking in synotic and atmospheric scintillation effects and at least averaging out these effects. Seems averaging the frame works for the synotic effect but seems if one wanted to really get at the heart of brightness variations caused by atmospheric scintillation then seems one would have to go beyond averaging and do a deconvolution process on the frames of the video but averaging should get one in the ball park for a simple process. There are some who do argue that atmospheric scintillation is not a real issue here but these people are using still images to figure such rates and video is turning out to be a horse of a different color which we believe is caused by sample rates or in this case frame rates. Seems in these two areas there is no total agreement.
Any way here is the issues were are trying to deal with with Astro Image J and Image J. For both programs it is a very steep learning curve for the non-professionals.
Karen have tried to get help on IMage J forum but no luck.
Thanks for any help
Regards
Thomas