gcb for Debian -------------- Gcb is a misleading name, it has nothing to do with great circles, as you will find out shortly. The short radio path between 2 radio stations is a curve along the globe drawn using the earth's center as a midpoint. Short paths are not only the shortest route, propagation via this path will most commonly take place in daylight. The long path is simply the radio path with both stations having their antenna turned 180 degrees. Propagation is almost always via the dark side of the earth. Please note that gcb is not very accurate. Gcb assumes that the earth is a perfect circle. In reality, earth is ellipsoid or pear-shaped. This means that there will be small calculation errors. However, for antenna directions and simple distance calculations as used by hamradio operators, you should be okay. Joop Stakenborg , Tue, 30 Sep 2003 15:50:55 +0100