Análisis e implementación del diferencial de GPS con configuración simple y doble, para mejorar la precisión de un receptor GPS en la ciudad de Riobamba.

Abstract

The main objective of the present titling work was to analyze and implement the differential technique of the global positioning system (GPS) in a simple and double configuration with the purpose of improving the precision of the GPS receptor data situated in the city of Riobamba. The investigation was developed two phases, the first constituted of raw data recollection with a low cost u-blox NEO 6M GPS receptor and the second phase consisted of the implementation of differential correction algorithms using pseudo-range measures in simple and double configurations aside from the development of a graphic interphase in Matlab for the execution of the same. The data was collected in eight zones within the city of Riobamba of which four of the best were taken based on distance conditions to the station of the global navigation satellite system (GNSS) reference location “EREC” that corresponds to the GNSS network of continuous monitoring of Ecuador (REGME). The standard precision offered by the low cost GPS devices is of 2.5m and when applying GPS differentiation techniques the obtained results of precision were considerably reduced. It was concluded that the most notable correction was seen in the station point of the Escuela Superior Politécnica de Chimborazo (ESPOCH) at a distance of 3.44Km from the reference station obtaining a decrease of 69.54% of error in a simple configuration and 69.99% in double configuration, in reference to the autonomous positioning. It is recommended to use the application for educational purposes and for technical verification in the different configurations rather than critical applications.