RE: Re: Decay of Molniya 1-79 20949

From: Fco. Javier Iruretagoyena (javiru@able.es)
Date: Thu Aug 25 2005 - 08:53:30 EDT

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    EOO = Earth Object Orbit, perhaps???? 
    
    -----Mensaje original-----
    De: b_gimle@algonet.se [mailto:b_gimle@algonet.se] 
    Enviado el: jueves, 25 de agosto de 2005 13:21
    Para: woodl@telus.net; seesat-l@satobs.org
    Asunto: Ang: Re: Decay of Molniya 1-79 20949
    
    (What is EOO?)
    
    The 4+ SpaceTrack elsets for Molniya 1-79 on day 214 have a MM just over 2,
    a perigee just over 100 km, and a drag term near .0036
    
    The elset for day 235 has MM~5.59 and perigee just 2 km lower, but drag
    reduced to .000005!
    
    This can partially be explained if drag tore away the solar panels, but to
    make Mike's INT2x produce the new MM, I have to set the initial drag about
    10x larger.
    
    This results in a perigee of 70 km, and drag .125 for day 238.
    
    To account for a one degree diff in RAAN, I must assume that drag was lower
    (?) initially, so the dip in perigee occurred at a later time.
    
    ...
    >
    >EOO using a 2 day old tle predicts Molniya 1-79 (20949) not to decay 
    >for some
    years.
    >
    >Larry
    
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