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- RNBR version 0.10
- 05 April 1998
-
- RNBR will calculate the distance (range) and compass angle (bearing)
- from one location on Earth to another. Within the limits of rounding,
- and because the Earth is not a sphere, the distance may be in error
- by a few kilometers. As of version 0.9, a different method of
- calcuating distance from one point to another is implemented.
- The Haversine Formula is credited to R.W. Sinnott. Now at version
- 0.10, some screen formatting problems and one calculation bug
- are fixed.
-
- The program also calculates the Maidenhead Grid Square for locations
- in the northern hemisphere and west of the zero meridian. The actual
- range and bearings are more than adequate for beam headings.
-
- New for version 0.10
- When the mathematics of calculating the bearing involves an almost
- divide by zero problem, at very short distances (range) the program
- will not attempt to calculate the angle, and offer a default text
- string.
-
- CTRL-C will exit the program if something should go wrong. Remember
- that in AMOS Basic, you can switch between the AMOS screen and the
- normal Workbench screen with the CTRL-A key combination.
-
- Among those persons who may find this program useful are Amateur Radio
- operators.
-
- When first run, the program looks for the latitude and longitude of the
- Amateur Radio station from which the beam antenna will be pointed.
- It won't calculate anything until the local coordinates are entered,
- and when you save the coordinates, the file MYLOC.LONGLAT will be
- written to the current directory.
-
- RNBR is an exercise in AMOS BASIC. Future versions of the program
- should have some sort of graphic representation of the Earth, but
- this version (0.10) does not.
-
- The author of RNBR Robert Davis K0FPC
- bobdavis@cadvantage.com
-