ANÁLISE DA ACURÁCIA NOS POSICIONAMENTOS DIFERENCIAIS APLICANDO AS TÉCNICAS DGPS E RTK

Revista Brasileira de Cartografia

关键词: Real time positioning;    DGPS;    RTK.;   

DOI  :  

来源: DOAJ

【 摘 要 】

The real time positioning techniques rely on the fact that errors in the reference station are, inits great majority, the same ones found in the rover station. However, while the distance between stations is increased, the errors which were analogous before become more and more uncorrelationed. Because of this process, there is a progressive degeneration in position fix. The main objective of this work is fundamented in studying the positioning accuracy for DGPS and RTK techniques. The main difference among these techniques refers to GPS observation. The DGPS technique applies the pseudoranges and in the RTK technique uses carrier phase for your solutions. Aiming to accomplish this objective ten test stations have been chosen, with baseline lengths varying from 0,2 to 29 Km. It was not possible, using results obtained in this research, to determine the spatial correlation value for DGPS and RTK techniques. However, it has been found that for these baselines, DGPS made planimetric errors smaller than 2,5 m possible, while errors using the RTK technique were smaller than 7 cm. Regarding altimetric errors, it has been verified that those were smaller than 6 m using DGPS technique, and smaller than 15 cm using RTK technique.

【 授权许可】

Unknown