Computationally Efficient Carrier Integer Ambiguity Resolution in Multiepoch GPS/INS: A Common-Position-Shift Approach

Chen, Yiming; Zhao, Shunyi; Farrell, Jay A.

doi:10.1109/tcst.2015.2501352

Cited by 22 publications

(8 citation statements)

References 31 publications

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“…Centimeter precision using a smartphone quality GNSS antenna is achieved by [27]. Methods to reduce the computational load to reach centimeter precision with combined GPS/IMU in real time, even in challenging environments, is presented by [28]. In any case, centimeter precision is not enough for the co-registration of lines into a point cloud, if the cloud should be processed with common 3D TLS algorithms.…”

Section: Introductionmentioning

confidence: 99%

Tree Stem Diameter Estimation from Mobile Laser Scanning Using Line-Wise Intensity-Based Clustering

Forsman

Holmgren

Olofsson

2016

Forests

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Diameter at breast height has been estimated from mobile laser scanning using a new set of methods. A 2D laser scanner was mounted facing forward, tilted nine degrees downwards, on a car. The trajectory was recorded using inertial navigation and visual SLAM (simultaneous localization and mapping). The laser scanner data, the trajectory and the orientation were used to calculate a 3D point cloud. Clusters representing trees were extracted line-wise to reduce the effects of uncertainty in the positioning system. The intensity of the laser echoes was used to filter out unreliable echoes only grazing a stem. The movement was used to obtain measurements from a larger part of the stem, and multiple lines from different views were used for the circle fit. Two trigonometric methods and two circle fit methods were tested. The best results with bias 2.3% (6 mm) and root mean squared error 14% (37 mm) were acquired with the circle fit on multiple 2D projected clusters. The method was evaluated compared to field data at five test areas with approximately 300 caliper-measured trees within a 10-m working range. The results show that this method is viable for stem measurements from a moving vehicle, for example a forest harvester.

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Section: Introductionmentioning

confidence: 99%

Tree Stem Diameter Estimation from Mobile Laser Scanning Using Line-Wise Intensity-Based Clustering

Forsman

Holmgren

Olofsson

2016

Forests

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“…Better positional accuracy is needed for tracking the location of utilities. This need for high accuracy led to Chen et al, [59] proposing a novel way of providing reliable positioning using a differential GPS (DGPS) technique by adding a ground station, which increased accuracy to 5 cm.…”

Section: Discussionmentioning

confidence: 99%

Integrating Geographic Information Systems and Augmented Reality for Mapping Underground Utilities

et al. 2019

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Underground infrastructure is a critical component of the basic utility services provided to society. The single largest threat to the safety of underground utility lines is being struck by construction earthwork projects. One of the causes of this problem is miscommunication between utility owners and contractors. Therefore, it is vitally important to coordinate resources, share information, and ensure efficient communication between construction personnel and utility owners. Geographic information systems (GIS) provide a solution for interoperability in the construction industry. Applying such technologies in the field of underground construction requires accurate and up-to-date information. Augmented reality (AR) has been identified as a technique that could enhance information extraction from the virtual world to the real world and improve the access and utilization of information. However, there is currently limited research that has integrated AR and GIS and evaluated the effectiveness and usability of the combination in this domain. The main objective of this research was to develop an integrated AR-GIS for mapping and capturing underground utilities using a mobile device. The data are shared instantaneously with other stakeholders through a cloud-based system. In order to achieve these objectives, a design research approach was utilized to develop and evaluate a mobile extended-reality (XR-GIS) application. Validation of the XR-GIS was conducted through a focus group discussion and a questionnaire. The results revealed that 86% of the participants validated the system’s adaptivity to the underground construction. We can conclusively say that this research has produced an efficient solution for data collection and sharing among stakeholders in the underground construction industry.

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“…For maximum reliability across a range of different challenging environments, advanced GNSS receivers should be integrated with other navigation and positioning technologies such as inertial navigation systems (INS) [90], [91]. In scenarios where there is a prolonged GNSS outage or NLoS signal propagation, GNSS/INS fusion can be used to improve the positioning accuracy.…”

Section: Navigation Processor Based Techniquesmentioning

confidence: 99%

GNSS Vulnerabilities and Existing Solutions: A Review of the Literature

et al. 2021

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This literature review paper focuses on existing vulnerabilities associated with global navigation satellite systems (GNSSs). With respect to the civilian/non encrypted GNSSs, they are employed for proving positioning, navigation and timing (PNT) solutions across a wide range of industries. Some of these include electric power grids, stock exchange systems, cellular communications, agriculture, unmanned aerial systems and intelligent transportation systems. In this survey paper, physical degradations, existing threats and solutions adopted in academia and industry are presented. In regards to GNSS threats, jamming and spoofing attacks as well as detection techniques adopted in the literature are surveyed and summarized. Also discussed are multipath propagation in GNSS and non line-of-sight (NLoS) detection techniques. The review also identifies and discusses open research areas and techniques which can be investigated for the purpose of enhancing the robustness of GNSS.

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Computationally Efficient Carrier Integer Ambiguity Resolution in Multiepoch GPS/INS: A Common-Position-Shift Approach

Cited by 22 publications

References 31 publications

Tree Stem Diameter Estimation from Mobile Laser Scanning Using Line-Wise Intensity-Based Clustering

Tree Stem Diameter Estimation from Mobile Laser Scanning Using Line-Wise Intensity-Based Clustering

Integrating Geographic Information Systems and Augmented Reality for Mapping Underground Utilities

GNSS Vulnerabilities and Existing Solutions: A Review of the Literature

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