NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Help with interpretation of deflection from the vertical
From: Fred Hebard
Date: 2003 Mar 18, 22:05 -0500
From: Fred Hebard
Date: 2003 Mar 18, 22:05 -0500
I downloaded one of the programs from the geodetic survey site referenced by Doug Stephen, and I also ran the online version of Deflec99, but I'm having trouble interpreting the output. Deflec99's output from the interactive version for my location was: latitude longitude Xi Eta Hor Lap Station Name ddd mm ss.sssss ddd mm ss.sssss arc-sec arc-sec arc-sec USER LOCATION 36 46 48.00000 80 50 42.00000 -2.72 0.61 -0.45 The intd routine, also from the Deflec99 folder, gave an output of: latitude longitude Xi Eta Hor Lap Station Name ddd mm ss.sssss ddd mm ss.sssss arc-sec arc-sec arc-sec Our House 36 46 48.00000 81 50 42.00000 -2.14 0.33 -0.25 For comparison the output for a location near Denver, Colorado, gave: latitude longitude Xi Eta Hor Lap Station Name ddd mm ss.sssss ddd mm ss.sssss arc-sec arc-sec arc-sec USER LOCATION 40 0 0.00000 105 5 0.00000 2.06 13.22 -11.09 The basic question is, what does this mean? The readme for Deflec99 discusses deviations in azimuth, but deviations in altitude are mentioned less frequently. Thanks, Fred