Greetings, fellow dialists, A little while ago there was a dialling discussion about pairs of places where the sun rose or set at the same moment. I recall that to solve the problem a "terminator" programme was called into play.
There are earlier examples of this question. Around the year 1950 airline pilots (who still used sextants) sat two successive navigation examinations, the higher of which was called the First N. In the written paper a question appeared of the form: "Find a day on which the sun sets (altitude 0 deg.) at the same moment in London and Paris (positions given)." This problem caused the pilots much head scratching until it was realised that this type of question occurred in every paper that was set. The solution is presumably a simultaneous equation in spherical trigonometry to discover the sun's declination. Would any dialist care to try it? Frank 55N 1W -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.472 / Virus Database: 269.9.0/852 - Release Date: 17/06/2007 08:23 --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
