Error Origin of GPS Location and Its Developement in Future
XU Zhi-fu · 2005
Precision of GPS location is effected by many elements.Major error origins are error related with GPS satellite,error related with signal propagation and error related with accepting equipments.In the future,developement of GPS depends on two sides: one is newly created Block ⅡF satellite,which will replace present BlockⅡR satellite,its age is 3 times as the present one;the other side is to use L_3C to propagate civil signal which need not be kept secrets.People do not need to measure phase fuzzy values in a week.On the basis of shortening observing time,location precision can get cm degree,which will promote reliability and work efficacy of observing achievements.