Integration of GPS-24, GEO & LEO: Modeling, receiver selection algorithm and performance analysis for navigation

In this research study, an integrated network of GPS-24, GEO and LEO has been designed to improve the worst-case precision values. The precision values to be realized by the receiver with an algorithm have been proposed. It is expected that a good worldwide availability of best four selected orbiting satellites among many having maximum coverage would be the preferred constellation for navigation. A new approach for minimum dilution of precision (DOP) determination using integrated constellation is developed. Satellite visibility through GPS receiver has been investigated using complex simulations of failure scenarios by giving shadow effect. This work is to improve coverage and satellite visibility for accurate, flexible, fast and cost-effective navigation purpose using integrated network. Using a 3-step algorithm a set of best four satellites selection is possible by minimum calculation by determining minimum DOP. A measurement for positioning, satellites at low elevation angles and at high elevation angles has been compared. The proposed model and algorithm will hopefully be used for navigation purposes in the worst case. The system can also be used academically as well as for commercial purpose.