Nrtk, ppp or static, that is the question. Testing different positioning solutions for gnss survey

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Abstract

Worldwide, the determination of the coordinates from a Global Navigation Satellite System(GNSS) survey (in Network Real Time Kinematic, Precise Point Positioning, or static mode) hasbeen analysed in several scientific and technical applications. Many of those have been carriedout to compare Precise Point Positioning (PPP), Network Real Time Kinematic (NRTK), and staticmodes’ solutions, usually, using the latter as the true or the most plausible solution. This approachis not always possible as the static mode solution depends on several parameters (baseline length,acquisition time, ionospheric, and tropospheric models, etc.) that must be considered to evaluate theaccuracy of the method. This work aims to show the comparison among the GNSS survey methodsmentioned above, using some benchmark points. The tests were carried out by comparing the surveymethods in pairs to check their solutions congruence. The NRTK and the static solutions refer toa local GNSS CORS network’s analysis. The NRTK positioning has been obtained with differentmethods (VRS, FKP, NEA) and the PPP solution has been calculated with two different software(RTKLIB and CSRS-PPP). A statistical approach has been performed to check if the distributionfrequencies of the coordinate’s residual belong to the normal distribution, for all pairs analysed.The results show that the hypothesis of a normal distribution is confirmed in most of the pairs and,specifically, the Static vs. NRTK pair seems to achieve the best congruence, while involving thePPP approach, pairs obtained with CSRS software achieve better congruence than those involvingRTKLIB software.
Lingua originaleEnglish
pagine (da-a)1-19
Numero di pagine19
RivistaRemote Sensing
Volume13
Stato di pubblicazionePublished - 2021

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