RE: TLE for Soyuz TMA-10

From: Bob Christy (rdc@zarya.info)
Date: Fri Apr 06 2007 - 20:45:08 EDT

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    David
    
    Given the Russian error margins, any prediction from the element could be in
    error by two minutes at rev 3. The first manoeuvre should then reduce the
    divergence. Ted's set may be slightly 'looser' but it all depends on how
    accurate the Russian 'shooting' is.
    
    Either set is good enough to guide a search - visual or radio - for the
    first four revs or so.
    
    Myself - I will continue to use a rule of thumb that has worked for the last
    thirty-plus years. I know the approximate sky track relative to local
    landmarks, and Culmination (or rapid change in the Doppler shift) of the rev
    4 pass over the UK occurs 365 (+/-1) minutes after lift off.
    
    ;-)
    
    
    > -----Original Message-----
    > From: David Anderman [mailto:davida@cwo.com] 
    > Sent: 06 April 2007 23:24
    > To: 'Seesat-L'
    > Subject: RE: TLE for Soyuz TMA-10
    > 
    > Bob:
    > 
    > If you look at this page (in Russian) at the TsUP web site:
    > 
    > http://www.mcc.rsa.ru/tma10/start.htm
    > 
    > you can see that there will be 2 large early burns, one during orbit 
    > 3 and one during orbit 4. Both will generate more than 20 meters per 
    > second in Delta-V, but I cannot say the impact on arrival time of 
    > Soyuz TMA-10 for anyone using the TLEs.
    > 
    > DWA
    > 
    > 
    > At 10:06 AM 4/6/2007, Bob Christy wrote:
    > >David:
    > >
    > >I don't know either!
    > >
    > >RDC
    > >
    > >
    > >
    > > > -----Original Message-----
    > > > From: David Anderman [mailto:davida@cwo.com]
    > > > Sent: 06 April 2007 16:16
    > > > To: 'Seesat-L'
    > > > Subject: RE: TLE for Soyuz TMA-10
    > > >
    > > > Bob:
    > > >
    > > > I don't know if these elements take the burns on
    > > > orbits 2 and 3 into consideration..........
    > >
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