Evaluación de un dispositivo Android utilizado como estación GNSS para ejercicios de corrección por postproceso.

Abstract

The main objective of the current degree work was to evaluate the operation of an Android smartphone device as a station of the Global Navigation Satellite System (GNSS) to perform correction exercises by post-processing. The research was divided into four stages. First, corresponding to the design and selection of test scenarios considering the basic requirements of the technique. Second, the extraction and collection of the data in the trajectories were done using a low-cost Rover receiver of Ublox Neo 6M brand; also, the extraction of the raw data of the Android device was performed using the Geo RINEX application. Third, the processing and conversion of the observation and navigation files to standard formats RINEX version 3.02 of the collected data was executed. Finally, in the fourth stage, the postprocessing was performed applying the Differential of the Global Positioning System (DGPS) using the GNSS information processing tool gLAB. The data was collected in 3 scenarios of Riobamba city, taking into account the separation distance with respect to the continuous monitoring station “Empresa Eléctrica Riobamba” (EREC). The results obtained using an Android device as a base station in the first three scenarios increased the error in the 3 axes exceeding 1000 meters and applying the DGPS with respect to the EREC station, a centimeter accuracy was reached. Large distances do not work with the proposed system, so it was decided to take new scenarios at distances less than the kilometer, where at 280 meters away the accuracy was improved by more than 99% in all axes, therefore the Android device acts and corrects errors such as a professional GNSS station considering distances less than 280 meters.