Aplicação da técnica PPP para a obtenção do posicionamento na cabotagem no Brasil: Estudo de caso

Abstract

This paper presents a methodology for GPS instrumentation and data post-processing for precise vessel tracks positioning along the Brazilian coast. In order to reach this aim, a container vessel was equipped with a pair of GPS receivers (L1/L2) for GPS data collection in sea path, from Santos (SP) to Suape (PE). The data were processed using Precise Point Positioning (PPP) methodology. The coordinates accuracy obtained for this path was about 23.1 cm. If the first 60 minutes of data were not used, the accuracy improved to approximately 8.0 cm. The correlation coefficient estimated between the receivers bearing was R2 = 0.922. Therefore, it was possible to obtain accurate information about the vessel trajectory and its speed, acceleration, relative drift and the tilt amplitude. This information will be utilized as input parameters of the greenhouse gas emissions (GHG) models previously developed.