Description:
This program for celestial
navigation calculates the point where two lines of position intersect (intercept
method) and replaces a graphic plot. Enter longitude and latitude of an assumed
position, azimuth and intercept of the first observation, and azimuth and
intercept of the second observation. Hit the "Calculate" button, and the program
does the rest. Blank dialog boxes are regarded as zero. Use the radio buttons to
select N, S, E, or W.
A running fix is obtained by entering course and
distance traveled between both observations. The program advances the first LOP
accordingly.
The program uses the laws of plane geometry and is subject
to the known restrictions. The angle between both LOP's should be in the range
from 30° through 150°, and the calculated position should be less than approx.
50 nautical miles away from the assumed position. The method is not accurate in
the vicinity of the poles.
License terms:
This program is
freeware and may be copied and distributed in unmodified form and on a
non-profit basis. For your private use, feel free to modifiy the source code
according to your requirements. Any commercial distribution requires the
author's permission.
Henning Umland
N53-20.1 E9-53.6
e-mail: mail@celnav.de
Check this web site for updated versions:
http://www.celnav.de
Warranty disclaimer:
This program is experimental and may still
contain bugs and errors, although it has been checked thoroughly. Use at your
own risk.