GPS

GPS, the talk of the town, means Global positioning system. It helps to identify a person uniquely around the globe. GPS consist of about 24 satellites. These satellites scan the globe around the clock. What we are more worried about is the GPS receiver. GPS receiver will be like our cell phone .It can communicate with the satellite any time. The whole architecture is designed in such a way that at any given point of time the receiver will be able to communicate to at lest 3 satellites. This process is known as Trilation. Thus the accuracy of locating a person heavily depends upon the no: of satellites that it can communicate with.