Re: [Feedback] Screen Capture of radar image of UARS re entry

From: Ryan Satterfield (rsatterf@gmail.com)
Date: Sun Sep 25 2011 - 05:05:26 UTC

  • Next message: Leo Barhorst: "Re: [Feedback] Screen Capture of radar image of UARS re entry (OT)"

    On Sun, Sep 25, 2011 at 1:04 AM, Ryan Satterfield <rsatterf@gmail.com>wrote:
    
    > I can almost guarantee that is a doppler radar anomaly.
    > Both images posted have been processed with an automated ground clutter
    > filter to reduce noise near the center of the image.
    >
    > The image below is an example of the same anomaly on a US station (without
    > a ground clutter filter).
    >
    > http://tinypic.com/r/2dvjsdx/7
    >
    >
    > On Sun, Sep 25, 2011 at 12:07 AM, Ted Molczan <ssl3molcz@rogers.com>wrote:
    >
    >> Chip Sufitchi wrote:
    >>
    >> > Someone sent me this image: http://www.n2yo.com/tmp/e.jpg
    >> >
    >> > Any thoughts are welcome.
    >>
    >> It is a frame from the display of an Environment Canada weather radar,
    >> located in Southern Alberta, near Calgary. Here
    >> is a better reproduction:
    >>
    >> http://www.flickr.com/photos/cyyj/6177276974/
    >>
    >> Some folks have speculated that the streak on that frame is related to the
    >> final descent of UARS. I disagree for two
    >> reasons.
    >>
    >> The first problem is the time, 05:30 UTC. Had UARS survived past
    >> USSTRATCOM's predicted decay time of 04:16 UTC, then it
    >> would have passed through the area near 04:18 UTC. Had it survived for
    >> another revolution, its next pass over N. America
    >> would have begun near 05:47 UTC, on a track far to the north of the area
    >> covered by the radar in question. There is no
    >> way to place UARS in that location at 05:30 UTC. Anyone wishing to claim
    >> that the streak on the radar was from a
    >> break-up on a pass at 04:18 UTC, would need to explain why it was detected
    >> only on a single frame, as well as the lack
    >> of witnesses, which is my second point of disagreement.
    >>
    >> Decays are visually spectacular, and there are millions of potential
    >> witnesses in the area, many of whom would have been
    >> out and about, late on a Friday evening, before midnight. For example, had
    >> the pass occurred at the typical break-up
    >> altitude - about 80 km, Calgary - population 1 million - would have had
    >> about a 60 deg elevation pass, and Seattle -
    >> pop. 3.7 million - would have had a 40 deg pass. To my knowledge, there
    >> has not been a single confirmed sighting.
    >> SeeSat-L received at least three reports from observers in the area, who
    >> knew where to look (I know, because I
    >> communicated with two of them directly), and they saw nothing.
    >>
    >> Ted Molczan
    >>
    >>
    >> _______________________________________________
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    >> http://mailman.satobs.org/mailman/listinfo/seesat-l
    >>
    >
    >
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