ASSESSMENT OF THE ACCURACY AND PRECISION OF MyRTKnet REAL-TIME SERVICES

Amirrudin, Muhammad Afiq; Din, Ami Hassan Md; Zulkifli, Nur Adilla; Amat, Muhammad Asyran Che; Hamden, Mohammad Hanif

doi:10.11113/jurnalteknologi.v83.13892

Cited by 6 publications

(3 citation statements)

References 10 publications

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“…Of course, results refer to only one cadastral system used in a particular country (Italy). However, the experimental results show centimetric accuracies achievable with the GNSS NRTK methodology, in both the planimetric and altimetric components, which is in agreement with [58], which found planimetric errors in the range of 0.03−0.08 m using the NRTK VRS observation technique at selected Cadastral Reference Mark points. Mean-…”

Section: Discussionsupporting

confidence: 87%

On the Accuracy of Cadastral Marks: Statistical Analyses to Assess the Congruence among GNSS-Based Positioning and Official Maps

Dardanelli

Maltese

2022

Remote Sensing

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Cadastral marks constitute a dense source of information for topographical surveys required to update cadastral maps. Historically, in Italy, cadastral marks have been the cartographic network for the implementation of mapping updates. Different sources of cadastral marks can be used by cadastral surveyors. In recent years, the cadastre is moving toward a digital world, and with the advancement of surveying technology, GNSS CORS technology has emerged in the positioning of cadastral marks. An analysis of congruence among cadastral marks using GNSS CORS and official maps is missing. Thus, this work aims to analyze the positional accuracy of some cadastral marks, located in Palermo, Italy, with regard to the official maps produced by the cadastral bureau, the local cartography, and Google Earth maps. A survey of 60 cadastral marks was carried out by conventional GNSS NRTK procedures, with the lateral offset method due to their materialization (mostly building edges), which is not always directly detectable. The cadastral marks’ positioning was obtained from different maps: cadastral maps and related monographic files, numerical technical maps, and Google Earth maps, to check their coordinate congruence. A statistical approach was performed to check whether the distribution frequencies of the coordinate’s differences belonged to the bivariate normal distribution for the planimetric coordinates and the univariate normal distribution for the altimetric component. The results show that the hypothesis of a normal distribution is confirmed in most of the pairs, and specifically, most of the analyses indicate that the highest congruencies seem to characterize the coordinates determined by using the GNSS and with those that can be deduced by the numerical technical maps. The results obtained experimentally show centimetric accuracies obtained by the GNSS NRTK survey, in both the planimetric and altimetric components, while the accuracies obtained from the georeferencing of the cadastral maps show differences in the order of 0.4–0.8 m. Meanwhile, the differences resulting from comparing the technical cartography produced by the local authority and Google Earth maps show greater criticalities, with a metric order of magnitude.

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Section: Discussionsupporting

confidence: 87%

On the Accuracy of Cadastral Marks: Statistical Analyses to Assess the Congruence among GNSS-Based Positioning and Official Maps

Dardanelli

Maltese

2022

Remote Sensing

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“…The GPS CORS stations are considered as far-field stations due to the distance that is around 300-1100 km from the earthquake's epicenter [6]. 1 hour of GPS data on 26 th December 2004 with 1-Hz sampling rate as recorded by 13 GPS CORS network in Peninsular Malaysia was utilised in this study, consisting of Malaysia Network Real-Time kinematic (MyRTKnet) and Malaysia Active GPS system (MASS) [1]. Each GPS CORS distance to the epicentre ranges from 517.78 km to 925.33km as illustrated in Figure 2.…”

Section: Gps Datamentioning

confidence: 99%

Seismic Wave Time of Arrival and Path Velocity Estimation Using 1-Hz GPS Data

Alim Shah,

Wan Aris,

Sha’ameri

et al. 2023

Jurnal Teknologi

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This paper proposed the method of determining seismic wave TOA and path velocity from Global Positioning System (GPS) data. High-rate GPS data from 13 Continuous Operational Reference Station (CORS) were utilized to obtain displacement and seismic waveform during the occurrence of Sumatra-Andaman 9.2Mw earthquake 2004. To detect seismic body waves using GPS data is difficult because of attenuated signal, therefore seismic surface waves have been used. The seismic wave TOA of between 116 s to 194 s was determined using time-frequency representation (TFR). The estimated seismic wave path velocities were found within the range of 3.8 km/s to 4.6 km/s, indicated as secondary wave or surface wave. To validate the estimated path velocity, it was compared with other research with an average value of 6 km/s to 13 km/s for body wave and 2 km/s to 5 km/s for surface wave. These results indicate that GPS CORS can be an alternative sensor for detecting earthquakes other than seismometers.

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“…must have 2880 epoch of 30 seconds interval data and must be available for the whole duration. The coordinates of both the CORS above are in Malaysia local geocentric datum named Geocentric Datum of Malaysia 2000 (GDM2000)[19,20]. Thus, the coordinates are first preprocessed into International Terrestrial Reference Frame 2014 (ITRF2014) to be consistent with coordinates declared by IGS CORS.…”

mentioning

confidence: 99%

GPS Continuously Operating Reference Station (Cors) Selection Towards Regional GPS Orbit Determination: A Simulated Study Using Trilateration Technique

Lee

Aris²,

Musa³

et al. 2022

Jurnal Teknologi

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Global Positioning System (GPS) orbital error can be minimized using precise satellite orbit. These precise satellite orbits are calculated using GPS measurements from ground CORS. The distribution of the CORS involved in GPS satellite orbit determination is important, especially in the case of regional GPS orbit determination. A regional GPS orbit is an orbital product generated using locally distributed CORS network and is expected to improve the GPS measurement in the region. Satellite Position Dilution of Precision (SPDOP) is proposed as an indicator to measure the geometry of the CORS with respect to the GPS satellite. GPS measurements are simulated by calculating the range from GPS satellites to the CORS. The simulated measurement is then used to calculate the position of GPS satellite using trilateration algorithm. Results shows the SPDOP has a linear relationship with orbit determination accuracy. This study shows that SPDOP can be used as an indicator for a better CORS selection in GPS orbit determination.

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ASSESSMENT OF THE ACCURACY AND PRECISION OF MyRTKnet REAL-TIME SERVICES

Cited by 6 publications

References 10 publications

On the Accuracy of Cadastral Marks: Statistical Analyses to Assess the Congruence among GNSS-Based Positioning and Official Maps

On the Accuracy of Cadastral Marks: Statistical Analyses to Assess the Congruence among GNSS-Based Positioning and Official Maps

Seismic Wave Time of Arrival and Path Velocity Estimation Using 1-Hz GPS Data

GPS Continuously Operating Reference Station (Cors) Selection Towards Regional GPS Orbit Determination: A Simulated Study Using Trilateration Technique

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