Re: TLE correction?

From: Bjorn Gimle (b.gimle@chello.se)
Date: Tue Mar 30 2004 - 13:05:15 EST

  • Next message: Leo Barhorst: "obs Mar 29"

    When USSTRATCOM computes elsets (issued by OIG) they usually reduce the
    Epoch to the preceding (following) ascending node from the latest
    observation.
    
    So, for a GEO, any duplicate within a day is likely to have nearly the
    same epoch.
    
    OTOH, as Ted's samples show, GEO elsets are often issued weekly, so
    something
    extraordinary must have been suspected in this case.
    
    For decaying objects, with a period usually below 90 minutes, more than
    one elset per orbit is quite common.
    
    ----- Original Message ----- 
    From: "Ted Molczan" <molczan@rogers.com>
    To: "SeeSat-L" <SeeSat-L@satobs.org>
    Sent: Tuesday, March 30, 2004 12:20 PM
    Subject: RE: TLE correction?
    
    
    > Gonzalo Garcia wrote:
    >
    > > The following two TLE sets were published in two different
    > > days. They have an epoch that is just separated by 3 seconds.
    > > I wonder if anybody knows how often this kind of situation
    > > takes place and what is the reason. Was there anything wrong
    > > with the first set?
    > >
    
    
    
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