Orbital Drift - Info Request

From: Mir16609@aol.com
Date: Mon Mar 20 2000 - 14:28:24 PST

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    The following is from my POC at NRL on TiPS:
    Hi Don,
        Sorry for the mix-up.  Our web server appears to be going haywire.
    For some reason, the web page from August 1997 is being displayed.  I
    will try to figure out what is going on.  In the meantime, these are the
    current two liners:
    1 00006U 00000C   00079.65277778 0.00001787  00000 0  20529-2 0 00000
    2 00006  63.4243 143.2686 0130396 359.8269 142.8215 13.65750644148970
    By the way, could you confirm something for me?  I was down at NASA-Marshall 
    this week
    trying to help the meteoroid/debris people understand why TiPS hasn't been 
    severed yet.  Of
    more importance to me was trying to warn them about how quickly the el-sets 
    degrade, which
    is going to be a big concern when TiPS comes down through the ISS altitude.  
    I have been trying
    to warn people about the fact that we do not predict the orbital motion of 
    tether systems
    particularly well.
    My first cut at it is that the US Space Command GP el-sets drift by ~150 
    km/day which
    translates to 20 sec/day alongtrack (falling behind the actual position).  
    Have you received
    any feedback from the amateur trackers which support this?
    Don Gardner  39.1796 N, 76.8419 W, 34m ASL
    Homepage: http://hometown.aol.com/mir16609/
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