Latitude Maps

What is the formulae/algorithm for connecting state vectors to the longitude and latitude on earth?

I am trying to set up a small program in which i can setup quafrants on earth. Based on the user's location it checks when a satellite passes over that grid. I have got all the calculations for the state vectors, but am having a problem in trying to get the longitude and latitude from those state vectors.

Public Comments

1. go to "Google Earth" and download the free program. It shows satellite images of the earth with tons of info including latitude and longitude of any position on earth Good Luck