Dear 2002 Conference attendees, John Carmichael tried my wall declination formula, and it did not work because I mistakenly put a minus sign where it didn't belong. I'm sorry to make an error in a method that was supposed to be so simple.
The Correct formula is Wall Dec. = A +/-ArcCos[Sin(C)/Cos(B)], NOT Wall Dec. = -A +/-ArcCos[Sin(C)/Cos(B)]. Note the minus sign before "A" has been removed. Please correct this on your handout. To the list members who were not at the conference, I apologize for the irrelevance of this message. Bill Gottesman -
