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    Re: sight reduction with GPS receiver
    From: Frank Reed CT
    Date: 2005 Mar 21, 20:14 EST
    Chas you wrote:
    "If anyone cares to try a different GPS
    receiver, be certain it is set for WGS84
    and directions are reported with respect
    to true north."
     
    What other options can you specify besides WGS84? (the only GPS receiver I own is an early basic model with no bells and whistles)
     
    By the way, I should have thought of this earlier, there is a simple test for ellipsoidal versus spherical distances. Set the device to calculate the distance between Lat,Lon of 0,0 and 0,90 (both points on the equator). Then calculate the distance between Lat,Lon 0,0 and 90,0 (along the Greenwich meridian to the North Pole). If the calculation is spherical, the distances will be the same.
     
    -FER
    42.0N 87.7W, or 41.4N 72.1W.
    www.HistoricalAtlas.com/lunars
       
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