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

From: SATCOM (john@satcom.freeserve.co.uk)
Date: Sun Sep 25 2011 - 05:26:47 UTC

  • Next message: SATCOM: "Re: [Spam] Re: UARS - Breakup over Alberta or the Pacific?"

    We looked at this on another forum 24 hours ago , just a couple of hours 
    after re entry and came to the
    conclusion it was an artifact related to the radar "sweep"
    
    
    If you study other radar images , this type of  anomaly is quite common.
    
    John
    
    ----- Original Message ----- 
    From: "Ryan Satterfield" <rsatterf@gmail.com>
    To: <seesat-l@satobs.org>
    Sent: Sunday, September 25, 2011 6:05 AM
    Subject: Re: [Feedback] Screen Capture of radar image of UARS re entry
    
    
    >
    > 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
    >>>
    >>>
    >>> _______________________________________________
    >>> Seesat-l mailing list
    >>> http://mailman.satobs.org/mailman/listinfo/seesat-l
    >>>
    >>
    >>
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