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 >>> >> >> > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > http://mailman.satobs.org/mailman/private/seesat-l/attachments/20110925/457c9aa1/attachment.html > _______________________________________________ > Seesat-l mailing list > http://mailman.satobs.org/mailman/listinfo/seesat-l > _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-l
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