Re: Correction, clarification, observations

From: Jonathan T Wojack (tlj18@juno.com)
Date: Fri May 18 2001 - 15:28:35 PDT

  • Next message: Russell: "Keyhole obs"

    > Clarification.  I wrote:
    
    Actually, I wrote those two lines.
     
    > > I don't know how to calculate the theoretical magnitude from RCS 
    > > and range.
    > 
    > Well, I ought to, but anyway, Rob Matson wrote a full magnitude 
    > equation for "a spherical satellite with a perfectly Lambertian 
    > surface" in this message:
    > 
    >  http://www2.satellite.eu.org/seesat/Apr-2001/0313.html
    
    Yes, but it is assumed that you know the standard magnitude of the
    object, and the RCS area is not involved at all.  But what if you don't
    know the standard magnitude, but the RCS area?  In some TLE's you will
    see the estimated (not based on visual observations) standard magnitude. 
    Where does that figure come from?  Is it just a guess based on previous
    experience, or is there a formula(s) involved?
    
    ------------------------------
    Jonathan T. Wojack                 tlj18@juno.com
    39.706d N   75.683d W            
    
    4 hours behind UT (-4)
    
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