Sunrise Sunset Times
I am interested in writing an Excel spreadsheet that computes sunrise and sunset times given latitude and longitude. Preferably, given the basic formulae, I would like to write the spreadsheet myself.
Could anybody assist? Also, I am aware of the numerous web, desktop, and PDA based solutions that are available as a discrete program, but I would prefer to create the spreadsheet myself as an academic exercise.
TIA for any assistance.