We found this handy little javascript satellite look-angle calculator that is amazingly accurate!

For example, use the coordinates for Detroit, Michigan:  

     42° North Latitude, and 83° West Longitude. 

Then enter a satellite's West Longitude from the chart and click on calculate. Fun! 

 Here are the coordinates of some major US cities:

These cities and satellites were chosen for demonstration purposes only. 

For a fascinating, three-dimensional look at the sheer number and position of the satellites presently orbiting in the sky, visit  http://science.nasa.gov/Realtime/jtrack/3d/JTrack3D.html  More fun!