gps error rectification: there are a many factors that prevent absolute gps accuracy in locating the receiver. One major reason is that it is impossible to achieve perfect synchrony between the clocks in all the satellites and the GPS receiver.
The satellites have atomic clocks which are very accurate by themselves and with respect to each other. But it is not possible to fit the GPS units with atomic clocks as atomic clocks are very expensive, and this is what usually causes time errors.
However the GPS system has been designed to …