Re: Unid observation

From: Mike McCants (mikem@fc.net)
Date: Wed Apr 05 2000 - 08:23:26 PDT

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    Russell Eberst posted:
    
    >The following observations are of an unidentified sat, with approx
    >elements:
    >Inclination 98 degs:  Revs/day 14.6:  R.A. of node 175 degs
    
    I have derived the following elset:
    
    Unknown       
    1 99999U          00095.88786884  .00000000  00000-0 +00000+0 0    08
    2 99999  98.6000 172.6000 0000100    .0001 359.9999 14.59000000    00
    
    Perhaps it will be within 2 minutes (early or late) of this elset
    after 24 hours.
    
    I wonder if it might match one of Mike Waterman's 98 degree unknowns?
    
    David Brierley posted:
    
    >I've made a perfect fit of a circular orbit to your observations, and
    >come up with the following more precise orbit:
    >
    > 0009501 00095.88789851  0.00000000
    >  98.5830 172.5676  0.0000100 357.2183   2.9264 14.59164421 6.0
    
    This elset is essentially the same as mine.
    
    Ed Light posted:
    
    >Can anyone point to a program one can use to convert elements from this
    >format to the more conventional TLE layout?
    
    Not that I know of.  David does not post his elements often enough,
    so there has not been much incentive to write a program when one
    can use a text editor for 1 minute to do one elset.
    
    1 99999U          00095.88789851  .00000000  00000-0 +00000+0 0    05
    2 99999  98.5830 172.5676 0000100 357.2183   2.9264 14.59164421    04
    
    >(Absent that, might one please
    >describe the meanings of the individual fields in the above format? )
    
    > 0009501 00095.88789851  0.00000000
    
    These are the line 1 values.
    
    "0009501" is the designation that Russell used.  But "2000 95 A" does
    not seem like a good choice to me.  :-)
    
    00095.88789851 is the epoch.
    
    0.00000000 is the drag term.
    
    >  98.5830 172.5676  0.0000100 357.2183   2.9264 14.59164421 6.0
    
    These are the line 2 values.
    
    What is that "6.0" out there on the end?  An intrinsic magnitude?
    Yes, that would make sense.
    
    Mike McCants
    
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