A5091770995- GNSS positioning and interference
- Inertial Sensor and Navigation
- Geophysics and Gravity Measurements
- Historical Geography and Cartography
- earthquake and tectonic studies
- Geological Formations and Processes Exploration
- Advanced Computational Techniques and Applications
- Geodetic Measurements and Engineering Structures
- Regional Development and Management Studies
- Geological Modeling and Analysis
- Astronomical Observations and Instrumentation
- Ionosphere and magnetosphere dynamics
- 3D Surveying and Cultural Heritage
- Stonefly species taxonomy and ecology
- Neural Networks and Applications
- Geological and Geochemical Analysis
- Indoor and Outdoor Localization Technologies
- Advanced Data Processing Techniques
- Remote Sensing and LiDAR Applications
- Target Tracking and Data Fusion in Sensor Networks
- Marine and environmental studies
- Soil Moisture and Remote Sensing
- Soil Geostatistics and Mapping
- Reservoir Engineering and Simulation Methods
- Robotics and Sensor-Based Localization
University of Ljubljana
2015-2024
Geodetic Institute of Slovenia
2014-2024
Robust Chip (United States)
2020
Global Navigation Satellite System (GNSS) low-cost multi-frequency receivers are argued as an alternative to geodetic for many applications. Calibrated antennas recently became available on the market making instruments more comparable with ones. The main goal of this research was evaluate noise GNSS receivers, compare positioning quality from different types antennas, and analyze differences between instruments. results a zero baseline test indicated that u-blox receiver, namely, ZED-F9P,...
The development of low-cost dual-frequency global navigation satellite system (GNSS) receivers in recent years has enabled the use these devices numerous applications. In monitoring natural hazards, such as landslides, can be considered suitable sensors. this work, GNSS and antennas were used for setting up near-real-time continuous systems (LGMSs) under field conditions. SimpleRTK2B board, which integrates u-blox ZED-F9P chip survey-calibrated antenna are main components system. LGMS was...
Low-cost dual-frequency global navigation satellite system (GNSS) receivers have recently been tested in various positioning applications. Considering that these sensors can now provide high accuracy at a lower cost, they be considered an alternative to high-quality geodetic GNSS devices. The main objectives of this work were analyze the differences between and low-cost calibrated antennas on quality observations from evaluate performance devices urban areas. In study, simple RTK2B V1 board...
Global Navigation Satellite System (GNSS) technology is widely used for geodetic monitoring purposes. However, in cases where a higher risk of receiver damage expected, GNSS receivers may be considered too expensive to used. As an alternative, low-cost that are cheap, light, and prove adequate quality over short baselines, considered. The main goal this research evaluate the positional precision multi-frequency instrument, namely, ZED-F9P with u-blox ANN-MB-00 antenna, investigate its...
The paper presents a new methodology for high precision monitoring of deformations with long term perspective using terrestrial laser scanning technology. In order to solve the problem stable reference system and assure quality possible position changes point clouds, is integrated two complementary surveying techniques, i.e., static GNSS positioning precise tacheometry. case study object where proposed was tested pressure underground pipeline situated in an area which geologically unstable.
Low-cost Global Navigation Satellite System (GNSS) receivers are currently used in various engineering applications. These low-cost devices regarded as suitable sensors for applications areas with a high risk of instrument damage. The main objectives this research were to identify the size displacements that can be detected relative and absolute positioning modes by GNSS instruments compare results selected antennas. Additionally, geodetic compared level observations. For study, SimpleRTK2B...
AbstractAbstractThe geoidal undulations are needed for determining the orthometric heights from Global Positioning System GPS-derived ellipsoidal heights. There several methods undulation determination. The paper presents a method employing Artificial Neural Network (ANN) approximation together with Least Squares Collocation (LSC). surface obtained by ANN is used as trend in least squares collocation. In numerical examples four surfaces were compared: global geopotential model (EGM96),...
This paper describes the procedure for testing statistical significance of point displacements in geodetic network as intermediate stage between adjustment respective epochs measurements and an in-depth deformation analysis. The cumulative distribution function test statistic, presenting relation displacement accuracy, is determined by simulations. On basis this a critical value statistic selected level determined. In null hypothesis it assumed that stable. A comparison to made actual risk...
High sensitivity GPS receivers have extended the use of GNSS navigation to environments which were previously deemed unsuitable for satellite signal reception. Under adverse conditions signals become attenuated and reflected. achieve reception by using a large number correlators an integration time. Processing observation data in dynamic rapidly changing requires careful consistent treatment. Code-based autonomous solutions can cause major errors estimated position, due primarily multipath...
The RANSAC (RANdom SAmpling and Consensus) enables us to search within a given group of points for subgroups that belong mathematically describable object or part an object.The number iterations single repetition depends on the data, selection settings input parameters (percentage inliers, probability minimum uniquely define geometrical shape).In our research we applied simulation modelling analyse influence approximation sphere plane models.
This article deals with the characteristics of deformation a body or figure represented by discrete points geodetic network. In each point network kinematic quantities are considered normal strain, shear and rotation. They computed from strain rotation tensors displacement gradient matrix on basis known vector. Deformation analysis requires appropriate treatment quantities. Thus statistical properties quantity in single have to be known. Empirical results shown that strongly related...
GNSS-instruments (Global Navigation SatelliteSystem) are the standard field surveying equipment (in addition to tachymeter and levels) for geodetic network establishment detail surveying.As in case of other instruments, it is essential pre-analyse GNSS-receiver quality parameters, obtained from laboratory calibration and/or testing specific instrument measuring method.Thus, relevance results, as indicated by manufacturer, that may explain suitability a GNSS-instrument measurements.In 2007,...
SI | EN GPS, Precise Point Positioning (PPP), mathematical model, GPS biases
uvodDržavni geodetski referenčni sistem je opredeljen kot sistemska državna infrastruktura za določanje in izražanje položaja objektov pojavov v prostoru.Sestavljata ga državni prostorski koordinatni topografski sistem.Državni omogoča enotno kakovostno položajev ter vzpostavljanje, vodenje uporabo prostorskih podatkov javnem zasebnem sektorju na celotnem državnem ozemlju.Organi javne uprave podatke vodijo javnih evidencah potrebe izvajanja nalog s svojih delovnih področij, predvsem pri...
A point cloud is the result of laser scanning; in case of terrestrial scanning, composed points scanned from one or more positions. To register these points into cloud, so-called tie points are needed; these may be object (natural targets) selected stabilized targets (artificial targets). Spherical targets often used as artificial targets; must have their centre coordinates and radius determined. The a sphere are calculated on basis scanned spheres’ surface. This paper presents two...