Re: Radar3DCoordinateSystem


Don,

Thank you for your sample code. I got it to work after seeing that - though what is *really* frustrating is I now cannot duplicate the error I was having. Arrggh! Oh well, It works and I should let it go. ;-)

For those who use the Radar3DCoordinateSystem:

I did a little comparring between an in-house AzRanElev-to-LatLonAlt algorithm and the Radar3DCoordinateSystem toReference() method and found that the latter does not account for the INDEX OF REFRACTION of the Earth's atmosphere. For "standard atmospheric conditions" the index of refraction is 4/3 * the Earth's Radius. This resulted in ~ 200 m difference at a range of 100 km and a ~300 m at a range of 400 km using an elevation angle of 0.5 degrees.

If anyone has any questions about this, I'd be happy to try to answer them.

-kevin.

--
+------------------------------------------------------------+
Kevin L. Manross        [KD5MYD] <><          (405)-366-0557
CIMMS Research Associate               kevin.manross@xxxxxxxx
[NSSL-WRDD/SWATN]           http://www.cimms.ou.edu/~kmanross

"My opinions are my own and not representative of CIMMS, NSSL,
 NOAA or any affiliates"
+------------------------------------------------------------+