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Re: sight reduction with GPS receiver
From: Frank Reed CT
Date: 2005 Mar 21, 20:14 EST
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."
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
42.0N 87.7W, or 41.4N 72.1W.
www.HistoricalAtlas.com/lunars