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Studying the Repeatability of Measurements Obtained via Network Real-Time Kinematic Positioning at Different Times of the Day
Estudio de la repetibilidad de mediciones obtenidas mediante posicio-namiento cinemático de red en tiempo real para diferentes momentos del día
DOI:
https://doi.org/10.15446/ing.investig.105622Keywords:
ANOVA, FKP, MAC, NRTK, static GNSS, VRS (en)ANOVA, FKP, MAC, GNSS estático, VRS (es)
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The network real-time kinematic (NRTK) positioning technique is currently used in numerous applications. The aim of this study was to better understand the process of obtaining accurate positions by statistically evaluating the significance of differences between repeated measurements for a single point at different times of the day (morning, noon, and evening) using the Virtual Reference Station (VRS), Flächen Korrektur Parameter (FKP), and Master Auxiliary Concept (MAC) correction methods. An analysis of variance (ANOVA) was used to this effect. Further analysis was carried out to determine the accuracy and precision of the coordinate differences obtained via a static GNSS (global navigation satellite system) and by averaging the repeated measurements. It was determined that the accuracy and precision of the vertical component of the coordinates were lower than that of the horizontal component. The FKP correction method yielded the best results. It was observed that the accuracy and precision of the measurements taken at noon were the lowest. The ANOVA showed that the differences between repeated measurements were statistically significant and that there were outlier measurements. The results of this study are important for NRTK users to be able to statistically evaluate different measurement configurations and obtain positions with the desired accuracy and precision.
La técnica de posicionamiento cinemático de red en tiempo real (NRTK) se utiliza actualmente en numerosas aplicaciones. El objetivo de este estudio fue comprender mejor el proceso de obtención de posiciones precisas evaluando estadísticamente la importancia de las diferencias entre mediciones repetidas para un solo punto en diferentes momentos del día (mañana, mediodía y tarde), utilizando los métodos de corrección de Estación Virtual de Referencia (VRS), Parámetro de Corrección de Área (FKP) y Concepto Maestro Auxiliar (MAC). Para ello, se utilizó un análisis de varianza (ANOVA). Se realizaron análisis adicionales para determinar la exactitud y la precisión de las diferencias de coordenadas obtenidas mediante un GNSS (sistema global de navegación por satélite) estático y promediando las mediciones repetidas. Se determinó que la exactitud y la precisión del componente vertical de las coordenadas eran menores que las del componente horizontal. El método de corrección FKP proporcionó los mejores resultados. Se observó que la exactitud y la precisión de las mediciones realizadas al mediodía eran las más bajas. El ANOVA mostró que las diferencias entre mediciones repetidas eran estadísticamente significativas y que había mediciones atípicas. Los resultados de este estudio son importantes para que los usuarios de NRTK puedan evaluar estadísticamente diferentes configuraciones de medición y obtener posiciones con la exactitud y precisión deseadas.
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