Re: MetOp-A seemingly a bit late

From: GlocalNet (bg_26934@glocalnet.net)
Date: Thu Sep 06 2007 - 05:42:51 EDT

  • Next message: alain.figer@club-internet.fr: "Re: Re: MetOp-A seemingly a bit late"

    Flashmail
    I agree, although MetOp-A alternates between normal and negative drag in a 
    sawtooth pattern.
    This drag/slow orbit correction is so small that it takes about four weeks 
    for a +drag elset to be 21 sec late wrt the previous -drag one.
    But the cycle is about 2.3 days up, 2.3 days down, so compared to reality 
    the +drag elset must be >6 weeks old to show this discrepancy.
    No sudden MM jump has occurred in the last two weeks.
    
    So if you verified that H-A used a 04 Sep elset, with MM=14.2149..., I 
    suggest your timing was off, or you saw a "red herring" (different object)
    
    06-44A 29499 METOP-A should have passed 3' ABOVE 11 Per 19:38:49
    81-65B 12586 SL-3 R/B 16' below 11 Per (HP061292) 19:39:09
    
    /Björn
    
      ----- Original Message ----- 
    
      From my place, 2006-044 A MetOp-A passed, on september 4th,  0°2 below the 
    star 11 Per at 19h39m08s UT, that is 21 seconds later than expected from the 
    Heavens-Above charts (for epoch 4sep).
    
      Rather an unusally large time delay.
    
    
    -------------------------------------------------------------------------
    Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive:  
    http://www.satobs.org/seesat/seesatindex.html
    



    This archive was generated by hypermail 2b29 : Thu Sep 06 2007 - 05:47:36 EDT