Re: STS-134: videos of Endeavour and ISS, plus solar transits

From: Thierry Legault (legault@club-internet.fr)
Date: Wed Jun 15 2011 - 22:24:33 UTC

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    hello
    
    I have put data (locations and times) in an 
    additional page: http://legault.perso.sfr.fr/STS-134_data.html
    
    One raw file (12-bit fits) is available here: 
    http://legault.perso.sfr.fr/sts-134_110529_f1819.fits
    
    regards
    
    At 23:44 05/06/2011, Thierry Legault wrote:
    >Justin, although I did not want to overload the 
    >e-mail and the web page (most visitors don't 
    >care about detailed info such as observation 
    >site coordinates), I can provide anything, there 
    >is no secret. You just have to ask what you need  :-)
    >
    >For the first video with Endeavour docked to ISS 
    >(area of Pau, France), here are the data:
    >- observation site: lat 4321'27"N, long 026'03"W, alt 183m
    >- ISS pass culmination at 3:54:35 UTC, altitude 77.4, distance 354.0 km
    >- telescope: 10" Meade ACF, focal length 5500mm 
    >(2.2x Barlow lens in front of the camera), yellow filter Wratten 12
    >- camera Skynyx L2-2 monochrome, resolution 
    >1616x1212, recording 12-bit fits files, exposure 
    >2ms, gain and gamma unchanged (1)
    >- processed video contains 800 frames, beginning 
    >at 3:53:24 UTC and ending at 3:54:50 UTC
    >- processing: each frame of the final video is a 
    >combination of 15 consecutive raw frames (no 
    >culling: all raw frames used), followed by 
    >wavelet processing in Prism (wavelet type=cube, 
    >coefficients: plane 1=4, other planes=1)
    >
    >I don't have a ftp account, but if you have one 
    >please give me the corresponding info so that 
    >I'll be able to upload the 3.2 gigabyte of raw 
    >files (800 frames, 4 Mbyte each).
    >
    >I'm going to a business trip all the week (I'm 
    >just an amateur astronomer, with a job for 
    >living :-)), but next week-end I'll be compiling 
    >all the data for the other videos and solar transits.
    >
    >regards
    >
    >At 17:48 05/06/2011, j.allport@utoronto.ca wrote:
    >
    >> > ------------------------------------
    >> > From: Thierry Legault <legault@club-internet.fr>
    >> > Date: Sun, Jun 5, 2011 at 4:40 AM
    >> > Subject: STS-134: videos of Endeavour and ISS, plus solar transits
    >> > To: SeeSat-L@satobs.org
    >> >
    >> >
    >> > hello,
    >> >
    >> > as usual I have travelled in western Europe to catch Endeavour during
    >> > STS-134, fighting with bad weather and average seeing. Here is the
    >> > compilation of the results:
    >> >
    >> > http://legault.perso.sfr.fr/STS-134.html
    >> >
    >> > You'll find a 3D video of a pass of Endeavour docked to the ISS
    >> > (stereo pair and anaglyph), another video with two passes of
    >> > Endeavour before return to Earth (unfortunately the seeing was bad)
    >> > and several solar transits.
    >> >
    >> > The videos have been taken with a 10" ACF Meade telescope on a
    >> > Takahashi EM-400 German mount heavily (hardware and software)
    >> > modified for real-time fast tracking with a guide camera on a finder.
    >> > The main camera is a Lumenera Skynyx L2-2 recording monochrome 12-bit
    >> > Fits files at 10 fps (one frame is 4 Mb and there are more than 1000
    >> > frames for a pass). As usual in planetary imaging, each frame of the
    >> > final video is a combination of 15 to 30 consecutive registered raw
    >> > frames (in order to smooth turbulence and to improve signal-to-noise
    >> > ratio), followed by slight sharpening.
    >> >
    >> > During this vacancy period I have also taken other satellites, it
    >> > will take some time for processing and preparation of pages but soon
    >> > you'll see videos of passes of USA-186 (Keyhole), X-37B (OTV-2) and
    >> > Nanosail. Stay tuned...  :-)
    >> >
    >> > regards
    >> >
    >> >
    >> >
    >> > Thierry Legault
    >> > www.astrophoto.fr
    >> >
    >>
    >>First, let me say that I find the data liked above absolutely
    >>outstanding. We are all better off for being able to share in Thierry
    >>and Emmanuel's results.
    >>
    >>Unfortunately, I can't be certain, but I think this report does not
    >>conform to the SeeSat list rules concerning high-resolution imaging.
    >>
    >>1. It's not clear to me the intent of rule 1. Is the observer required
    >>to provide all available existing desginations from the 3 listed, or
    >>only one of the listed? I believe only the common name is provided.
    >>It's possible this is sufficient.
    >>
    >>3. I was not able to find the observing location in the email above,
    >>or on the linked site. I propose that "Pau, France", or "Spain" is not
    >>of sufficient precision for me to evaluate the supplied data.
    >>
    >>4. Date and time have been provided to the nearest minute. A factor of
    >>60 too coarse to enable reasonable analysis of the data per SeeSat
    >>rules. Other observations on the same page have been provided to the
    >>nearest day. A factor of > 80000 too coarse. Further, even if the time
    >>to the nearest second were provided for the video, there are many
    >>still-frames shown from the video. It is not clear to me at what point
    >>in the video these were taken, compounded by the fact that the video
    >>itself has been accelerated. By my estimation, none of the presented
    >>data is in accord with this rule.
    >>
    >>9. The data provided are deficient in several aspects: Total duration
    >>is provided for the solar transit images, but not for the pass videos.
    >>Exposure per frame is not provided for the video (though thankfully it
    >>is provided for the DSLR-taken transit images. Resolution and bit
    >>depth for the raw data are not provided.
    >>
    >>10. Processing is described in a cursory manner on the linked
    >>equipment page (stacking in groups of 10, wavelet sharpened, and low
    >>level adjustment). It's not clear exactly what settings are used for
    >>such processing, nor is it clear whether there has been any culling
    >>from the raw data prior to stacking.
    >>
    >>11. Raw data is not provided, nor is it offered as available on request.
    >>
    >>As such it is clear this post does not adequately address the list
    >>rules. I leave it as an exercise for the reader to decide if it's the
    >>posted data or the rules themselves that are inappropriate for the list.
    >>
    >>Regards,
    >>Justin
    >>
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    >
    >Thierry Legault
    >www.astrophoto.fr
    
    Thierry Legault
    www.astrophoto.fr
    
    
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