Evaluation of GPS Receiver Position Accuracy Improvement Using Least Squares Estimator over the South Zone of Indian Subcontinent

P. Sirish Kumar and V.B.S. Srilatha Indira Dutt

The process of obtaining the location or spot of any object on or above the earth is termed as GPS. Accuracy is required in the applications of GPS like position estimate, atmospheric errors, satellite clock errors etc., from meters to centimetre level. Several different parameters like satellite geometry, atmospheric delays, various multi-path effects, number of satellites in view and navigation solution impinges the accuracy of GPS position estimation. To provide a felicitous solution for the above mentioned parameters need to be examined evenly because they do not have constant global behaviour. This paper mainly pivots on enactment of Least Squares Estimator with data obtained from dual frequency Global Positioning System receiver situated at Indian Institute of Science, Bangalore (13.0210N/77.50E) to furnish with suitable navigational algorithm over south zone of Indian subcontinent. This algorithm performance based on 2d and 3d statistical position accuracy measures Circular-Error-Probability (CEP), Spherical-Error-Probability (SEP), DRMS & confidence level is assessed to interpret their performance over this region. This paper finds the error in position using the least squares estimator and toils not only in providing an accurate navigation solution to a particular application but also for providing over a particular region.

Volume 11 | Issue 6

Pages: 114-119