RE: [Spam] Re: ROSAT: evolution of predicted decay v9

From: Walter Ridgewell (wridgew1@memlane.com)
Date: Sat Oct 22 2011 - 21:28:19 UTC

  • Next message: Paul Salanitri: "Re: Decay Forecast ROSAT"

    Well, somewhat off topic but using my skills in the 'black arts' ;-)  I can
    tell you this about the photo 
    
    Processing-
    
    Make = Canon
    Model = Canon EOS 5D Mark II
    Orientation = top/left
    X Resolution = 72
    Y Resolution = 72
    Resolution Unit = inch
    Software = Adobe Photoshop CS5 Windows
    Date Time = 2011-10-21 19:11:28
    
    Camera Data-
    
    Exposure Time = 2"
    F Number = F3.5
    Exposure Program = 9
    ISO Speed Ratings = 2000
    Exif Version = Version 2.21
    Date Time Original = 2011-10-21 18:33:30
    Date Time Digitized = 2011-10-21 18:33:30
    Shutter Speed Value = -1 TV
    Aperture Value = 3.61 AV
    Exposure Bias Value = 0EV
    Max Aperture Value = F3.51
    Subject Distance = Infinity
    Metering Mode = Pattern
    Flash = Flash did not fire, compulsory flash mode
    Focal Length = 8mm
    Subsec Time = 0.10"
    Subsec Time Original = 0.10"
    Subsec Time Digitized = 0.10"
    Color Space = Uncalibrated
    Exif Image Width = 800
    Exif Image Height = 800
    Focal Plane X Resolution = 3849.212
    Focal Plane Y Resolution = 3908.142
    Focal Plane Resolution Unit = inch
    Custom Rendered = Normal process
    Exposure Mode = Auto exposure
    White Balance = Manual white balance
    Scene Capture Type = Normal
    A431 = 320107001
    A432 = 8/1, 8/1, 0/0, 0/0
    A434 = 8mm
    
    All digital cameras record what is known as EXIF data an insert that in an
    image, along with GPS data. If you can access the uploaded image (ie posted
    on a website) and it hasn't been modified in a processing package that
    modifies the data header, you can read that data which has the image
    date/time.  Might be helpful to you folks in the future.
    
    Cheers, 
    Walter Ridgewell,   I.S.P. , ITCP/IP3P
    
    > -----Original Message-----
    > From: seesat-l-bounces+wridgew1=memlane.com@satobs.org [mailto:seesat-
    > l-bounces+wridgew1=memlane.com@satobs.org] On Behalf Of Paul Salanitri
    > Sent: October 22, 2011 6:26 AM
    > To: Ted Molczan
    > Cc: Seesat List
    > Subject: [Spam] Re: ROSAT: evolution of predicted decay v9
    > 
    > I think our only hope is to match a recent observation and tune the
    > drag
    > setting in a TLE file and SatEvo it.
    > 
    > There is a very good (actually fantastic) photograph that could not
    > have
    > been done any better - perfect, but I am struggling to contact the
    > photographer.
    > 
    > Photo details:
    > http://spaceweather.com/submissions/large_image_popup.php?image_name=Da
    > vid-Harvey-_MG_5615ps3_web_1319250108.jpg
    > Photographer: David Harvey
    > 
    > This would be enough to get the time to within a few hours I believe.
    > 
    > Paul S.
    > 
    > On Sat, Oct 22, 2011 at 10:17 PM, Ted Molczan <ssl3molcz@rogers.com>
    > wrote:
    > 
    > > I have updated my plot of decay predictions of ROSAT (1990-049A /
    > 20638),
    > > made by myself, The Aerospace Corporation,
    > > USSTRATCOM, and Harro Zimmer.
    > >
    > > http://satobs.org/seesat_ref/misc/ROSAT_decay_predictions_v9.pdf
    > >
    > > The consensus date of decay remains Oct 23 UTC.
    > >
    > > Oddly, the latest TLE on Space Track remains that of epoch
    > 11294.0621390,
    > > nearly 35 hours ago, yet a new TIP message has
    > > appeared in the interim.
    > >
    > > 1. Updated since my previous report:
    > >
    > > USSTRATCOM's latest TIP prediction, issued Oct 22 at 03:30 UTC,
    > predicts
    > > decay on Oct 23 at 01:31 UTC, +/- 24 h:
    > >
    > > http://www.space-track.org
    > >
    > > Harro's latest prediction, issued Oct 21 at 14:40 UTC, is 23 October,
    > 05:33
    > > UTC +/- 6 h:
    > >
    > > http://satobs.org/seesat/Oct-2011/0214.html
    > >
    > > 2. Unchanged since my previous report:
    > >
    > > My latest Satevo prediction, based on the epoch 11294.0621390 TLE, is
    > Oct
    > > 23 near 05:00 h UTC. Uncertainty is about 10
    > > h, based on the 20 percent of time remaining to decay rule of thumb.
    > >
    > > The Aerospace Corporation's latest prediction, based on the epoch
    > > 11293.8168200 TLE, is Oct 23 at 13:24 UTC +/- 16 h:
    > >
    > > http://reentrynews.aero.org/1990049a.html
    > >
    > > I intend to provide updates from time to time, including predictions
    > from
    > > additional sources. Suggestions of sources are
    > > welcome.
    > >
    > > Ted Molczan
    > >
    > >
    > > _______________________________________________
    > > Seesat-l mailing list
    > > http://mailman.satobs.org/mailman/listinfo/seesat-l
    > >
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