I've been a location photographer for more than 25 years, knowing where and when the sun rises and sets is very important to my business. With the advent of the Internet as well as some fantastic web sites, this task could never be more simply.
Like a lot of photographers, before I head out to a new location I"ll first visit Google Maps/Google Earth to become familiar with my location. The next thing I'll do is open a program called "The Photographer's Ephemeris". This program is a free download for the desktop version, and the mobile version for your iPod Touch or iPhone is about 9 bucks.
What I like most of all about the program is, I can use a slider to advance the suns position throughout the day. With the satellite view, it allows me to see from what angle the suns position will be in at any given time and therefore allow me to plan my photographic day. The program uses different colored lines showing you the exact line at which the sun will track. As you move the time slider, the line indicating the suns position will move across the map.
Do check out this great program, if you have seen another one you like better, I'd like to hear about it. DT