Re: Amazing ISS Video (Thierry Legault)

From: Thierry Legault via Seesat-l <seesat-l_at_satobs.org>
Date: Fri, 10 Oct 2014 23:29:15 +0200
...and the rest of the reply

Regards

At 08:17 08/10/2014, Ronald Lansing via Seesat-l wrote:
>Thierry Legault started out with a more modest 
>system which seemed to work fine. His primary 
>target was the ISS and using a video camera. I 
>think he actually stacked single frames and the 
>recreated a video from the stacked images. He is 
>very well respected, but IMO you do not need 
>specialized equipment for videoing satellites 
>anymore. He probably has sponsors now. Perhaps 
>for the ISS, because it goes by so fast, up 
>about 400 miles, he needs that equipment. These 
>are some others doing this using the same 
>tracking system but with different hardware 
>configurations. 
>http://sweiller.free.fr/ISS/ISSTracking/Emmanuel-Rietsch-System/ISS-TRACKING- 
>EmmanuelRietsch-TrackingSystem.htm#MostRecent 
>Emmanuel Rietsch Tracking System © 2014 Philip 
>Smith http://www.youtube.com/watch?v=EQ-YF7TQg3I 
>ATV-5 Spacecraft Docked to ISS 8-22-14  © 2014 
>Philip Smith 
>http://www.youtube.com/watch?v=8HMm-CjDs0k 
>SpaceX Dragon and ISS Imaged from Manorville NY 
>USA http://www.youtube.com/watch?v=7pyWl2I1UHo

Those people use the same system as mine 
(although on a different mount), for the simple 
reason that in 2009, I launched this project and 
contacted a friend who works in electronics and 
computers. It took much more time and effort than 
expected: two years and more than 20,000$ from my 
wallet, not counting the hundreds of hours of 
testing and tuning to get a system working properly.

I am sponsored by nobody. I AM the sponsor and 
without me, those people would never have had the 
opportunity to get a similar system at an affordable price.

>I have been using a Meade LS6, Maxview 40 lens 
>and adapter, and a Sony CX550V Handycam for the 
>last several years and getting good results. 
>Lately a NexStar6SE, Maxview 40 lens and video 
>adapter, and a Sony CX500V HD Handycam. This is 
>a link to one recent youtube video with my under 
>$1500 setup. Shows several satellite still 
>images from single HD video frames, at the end. 
>These are in the geo belt and did not appear to 
>be moving, so up about 22,000 miles.

Of course, for geostats you need no tracking 
system since they don't move. For an object like 
ISS, moving over 1 per second, that's another 
matter. Trained people track by hand, but they 
get only still frames, no continuous video.

The only problem is that, from 36000 km, they 
look so small that even the biggest telescopes on 
Earth would hardly get few details on the ISS if 
it were at that distance (and geostats are much 
smaller than the ISS). Of course, trying to get 
any detail on geostats with a 6" telescope is 
just a joke. I don't know what you got on your 
video, but it's not real details and/or real 
satellites. I would be curious to see the raw 
video, I'm afraid that tracking unevenness, 
compression and/or excessive processing make 
strong artifacts. That already happened in the 
past to someone else who is no more on this list...

:-)



Thierry Legault
www.astrophoto.fr

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Received on Fri Oct 10 2014 - 16:30:16 UTC

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