I don't quite follow your arguments or conclusions (are there any?) here. During a pass Lacrosse can change its local sun-observer attitude by about a degree/s. Do you mean that the disapperances occurred at nearly the same attitudes? In that case it would be a local observer event? Have there been any observations at the same moment from distant observers, to prove that it is a satellite event? /Bjorn ----- Original Message ----- From: "Gerhard HOLTKAMP" <grd.holtkamp@t-online.de> To: <SeeSat-L@satobs.org> Sent: Thursday, October 18, 2007 7:13 PM Subject: Re: Lacrosse-5 flares and disappearance. > > Sorry, I made a mistake subtracting two simple numbers: The difference > between > 20:12:15 and 20:15:15 would be 3 minutes and not three! Thus my > observation > of the Lacrosse 5 disappearance was followed 3 minutes later by the > disappearance observed by Oleinikoff followed by another disappearance 2 > minutes after that. > > In response to Allen Thomson suggestion of simultaneous observations of > this > disappearance trick from different sites we did just that earlier this > year. > For instance on 26-MAR-07 such a Lacrosse 5 disappearance was observed > simultaneously from two different places in England from my site in > Germany. > Of course there is no guarantee that the event on 14-AUG-07 would have > been a > genuine satellite effect or a local observer effect but I still find it > interesting that there were three disappearances observed within just 7 > minutes when during that time the position of the sun relative to the > local > satellite frame changed by just 6 degrees. > > Gerhard HOLTKAMP > Darmstadt, Germany, > > > On Thursday 18 October 2007 14:57, Gerhard HOLTKAMP wrote: >> on 14-OCT-07 Oleinikoff Nikolay wrote about Lacrosse 5 disappearances: >> >14 Aug 2007 >> >In 20:14:53 - flare (? m.) >> >And 20:15:14 - disappeared. >> >In 20:17:03 - now re-appeared with flash +1.0 m. >> >And 20:17:15 - disappeared. >> >In 20:17:18 - now re-appearance +2.0 m. (+/-3s.) >> >> I just remembered having taken a few pictures of Lacrosse 5 at the time. >> The first 15 sec exposure started at 20:11:44 UT, 14-AUG-07 and showed a >> very bright (about mag 1.5) Lacrosse 5 trail. Shortly after the exposure >> was finished the satellite quickly faded and I lost track of it in the >> bright city sky of mine. But on a second photo I took at 20:12:37 UT it >> showed up as a very weak trail at least 3 mag less than before. It must >> have disappeared at about 20:12:15 UT. Checking with the times that >> Oleinikoff Nikolay found (and assuming that this disappearance is >> intrinsic >> to the satellite and doesn't depend on the observer) it would mean that >> it >> dissappeared on that pass every two minutes. >> >> Gerhard HOLTKAMP >> Darmstadt, Germany >> 49.8822N, 8.6558E >> >> >> ------------------------------------------------------------------------- >> Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive: >> http://www.satobs.org/seesat/seesatindex.html > > ------------------------------------------------------------------------- > Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive: > http://www.satobs.org/seesat/seesatindex.html > ------------------------------------------------------------------------- Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive: http://www.satobs.org/seesat/seesatindex.html
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