Published

2018-01-01

Precision and accuracy of the static GNSS system for surveying networks used in Civil Engineering

Precisión y exactitud del método GNSS en modo estático para redes topográficas utilizadas en ingeniería civil

Keywords:

GNSS, Static, precision, accuracy, multipath, surveying networks (en)
GNSS, estático, precisión, exactitud, efecto multitrayectoria, redes topográficas (es)

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Authors

  • Nixon Alexander Correa Muñoz Associate Professor Faculty of Civil Engineering, University of Cauca PhD Student, Faculty of Engineering, Universidad Nacional de Colombia https://orcid.org/0000-0003-1604-0755
  • Liliana Alejandra Cerón-Calderón Manager in C&A INGENIERIA S.A.S. Civil engineer of Cauca University https://orcid.org/0000-0002-4654-4930

A field check was implemented for calibrating surveying equipment. It was geo-referenced with a Total Station Theodolite and by implementing procedures concerning repeatability and reproducibility. We carried out GNSS (Global Navigation Satellite System) static positioning with double frequency equipment, sensitizing occupation times, day times, uncorrected coordinates subjected to a differential correction procedure and type of coordinates obtained. This facilitated an evaluation of precision and accuracy for the GNSS positioning with the static method, which gave a global RMSE (root mean square error) of 1 cm for conditions with no multipath effect and 4 cm for field calibration points close to buildings. Additionally, optimal results for occupation times of 30 minutes were found, and the need to use planar Cartesian coordinates to ensure compatibility with the surveys using electronic measurement of distances, which allows the use of the static GNSS positioning for geo-referencing precise surveying networks, and can be used in different applications in Civil Engineering.

Se implementó un campo patrón de verificación de equipos topográficos. Este fue geo-referenciado con un instrumento de estación total y mediante procedimientos de repetibilidad y reproducibilidad. Se realizaron posicionamientos estáticos GNSS (por las siglas en inglés de Global Navigation Satellite System) con equipo doble-frecuencia, sensibilizando el tiempo de ocupación, la hora del día, las coordenadas sin corregir y sometidas al procedimiento de corrección diferencial y el tipo de coordenadas obtenidos. Lo anterior permitió una evaluación de la precisión y exactitud del posicionamiento GNSS con el método estático, encontrándose un error medio cuadrático global de 1 cm para condiciones sin efecto de multi-trayectoria y de 4 cm para los puntos del campo de verificación cercanos a edificios. Adicionalmente se encontraron resultados óptimos para tiempos de ocupación de 30 minutos y la necesidad de utilizar coordenadas planas cartesianas para garantizar la compatibilidad con los levantamientos utilizando la medición electrónica de distancias, lo cual permite utilizar el posicionamiento GNSS estático para georreferenciar redes topográficas de precisión y pueden ser usadas para diferentes aplicaciones en ingeniería civil.

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How to Cite

Precision and accuracy of the static GNSS system for surveying networks used in Civil Engineering. (2018). Ingeniería E Investigación, 38(1), 52-59. https://doi.org/10.15446/ing.investig.v38n1.64543

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Copyright (c) 2018 Nixon Alexander Correa Muñoz, Liliana Alejandra Cerón-Calderón

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