Re: Lacrosse-5 flares and disappearance.

From: Bjorn Gimle \(GlocalNet\) (bg_26934@glocalnet.net)
Date: Thu Oct 18 2007 - 14:43:02 EDT

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    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
    >>
    >>
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