الفهرس 
ACKNOWLEDGEMENTOnly 14 pages are availabe for public view
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Abstract
Satellite positioning is based on accurate data for location of each satellite. It uses satellite signals to generate distance to ground receivers and thus provide resectioned position anywhere on the earth. Satellite orbits have been designed so that the ground positioning can usually be determined at any point on the earth and at any time.
A minimum of four satellites must be tracked to solve the positioning intersection equations.
One of the problems in (GPS) system appears on the places, where the satellite signals are not reached to the reciever such as points through forested areas with dense trees cover or points inside tunnels or in cities where the building and other skycreepers exist, then the (GPS) satellite signals are blocked.
In this research, we try to solve this problem by using two systems of coordinates, the first system of coordinates is called the local positioning system (LPS) while the second system is called the global positioning system (GPS). This is carried out by occupying the unknown point by a total station or an electronic theodolite and oriented to other three known points around the unknown point.
The geodetic coordinates ( φ , λ ) of the unknown point are determined.
Formulas are derived for the cartesian coordinates of all points and also, the distance between the unknown point and the three known points in case of points on the reference ellipsoid of the earth and on the topographic surface.
Also, in this research we have developed a new software program based upon geodetic surveing rules, geodetic geometry, data structures, mathematical geodesy and matrix system derivative, GPS system and coordinates transformation of point. The program was written using MATLAB Version 7.6 ( R 2008 a ) programming language and includes 11 algorithms. Some numerical examples are given.