Re: Some errors in Heavens Above's prediction on Iridium Flares

From: Tom Wagner (sciteach@mchsi.com)
Date: Wed Jul 31 2002 - 22:09:43 EDT

  • Next message: Hayden: "elevation angles"

    ----- Original Message -----
    From: "Matson, Robert" <
    
    Subject: RE: Some errors in Heavens Above's prediction on Iridium Flares
    
    
    >....most beginning observers overestimate all elevation angles -- with
    increasing errors as the angle increases.
    
    +++++++++
    
    I recently purchased a "pitch and angle locator" at a local hardware store
    (Menards) for about $5. I have yet to adapt it to line-of-sight viewing but
    it does gives me an accurate idea about what the various elevation angles
    look like with respect to the horizon.
    
    For spotting the iridium flares I also find it useful to get to the place in
    H-A where the track of the satellite is plotted on a star chart. From there
    I mark where the flare is going to be then use the stars as a guide. I find
    that this is more reliable than simply estimating where to look.
    
    Tom
    Iowa
    USA
    
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