Algorithms for crossover point determination

This paper examines three methods of determining a GPS satellite crossover point. One method is based on an iterative grid search algorithm. Two other algorithms are based on analyzing a satellite orbit and then employing a multidimensional Newton-Raphson scheme. Trial runs on each scheme enable us to determine important qualities such as memory, speed, and robustness. These qualities are important for ascertaining the best method for finding the crossover point.