A5028600811- Geophysics and Gravity Measurements
- GNSS positioning and interference
- Geomagnetism and Paleomagnetism Studies
- Geophysical and Geoelectrical Methods
- Statistical and numerical algorithms
- 3D Surveying and Cultural Heritage
- Remote Sensing and LiDAR Applications
- Inertial Sensor and Navigation
- Marine and environmental studies
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Satellite Image Processing and Photogrammetry
- Structural Health Monitoring Techniques
- Geological Modeling and Analysis
- earthquake and tectonic studies
- Robotics and Sensor-Based Localization
- Methane Hydrates and Related Phenomena
- Reservoir Engineering and Simulation Methods
- Historical Geography and Cartography
- Earthquake Detection and Analysis
- Soil Moisture and Remote Sensing
- Maritime Navigation and Safety
- Geological and Geophysical Studies
- Seismology and Earthquake Studies
- Anomaly Detection Techniques and Applications
- Optical measurement and interference techniques
Istanbul Technical University
2011-2024
Geomatics (Norway)
2024
Beijing Satellite Navigation Center
2020
Afyon Kocatepe University
2020
One of the most intricate branches metrology involves monitoring displacements and deformations natural anthropogenic structures under environmental forces, such as tidal or tectonic phenomena, ground water level changes. Technological progress has changed measurement process, steadily increasing accuracy requirements have led to continued development new measuring instruments. The adoption an appropriate strategy, with proper instruments suited for characteristics observed structure its...
This article investigates the role of different approaches and interpolation methods in gridding terrestrial gravity anomalies. In this regard, first all, simple complete Bouguer anomalies are considered data gridding. comparison results these two anomaly datasets, effect high-frequency contribution topographic gravitation (by means terrain correction) is clarified. After that, used algorithm on resulting grid mean hence geoid modeling accuracy inspected. For purpose, four including...
AbstractAbstractTransformation of ellipsoidal heights derived from the Global Positioning System (GPS) to orthometric using geoid models is investigated in north and west parts Turkey. Although transformation depends on a simple relation between h, H N heights, accuracy resulting after crucial geodetic surveying applications. Various factors which affect this accuracy, such as measurement errors, datum inconsistencies theoretical assumptions, are study, while testing different methods three...
This investigation evaluates the performance of digital terrain models (DTMs) generated in different vertical datums by aerial LiDAR and unmanned vehicle (UAV) photogrammetry techniques, for determination validation local geoid models. Many engineering projects require point heights referring to a physical surface, i.e., geoid, rather than an ellipsoid. When high-accuracy model is available study area, are practically obtained with transformation global navigation satellite system (GNSS)...
The launch of dedicated satellite missions at the beginning 2000s led to significant improvement in determination Earth gravity field models. As a consequence this progress, both accuracies and spatial resolutions global geopotential models increased. However, spectral behaviors released vary mainly depending on their computation strategies. These strategies are briefly explained article. Comprehensive quality assessment by means statistical analyses provides comparison mapping these models,...
Light detection and ranging (LiDAR) data systems mounted on a moving or stationary platform provide 3D point cloud for various purposes. In applications where the interested area object needs to be measured twice more with shift, precise registration of obtained clouds is crucial generating healthy model combination overlapped clouds. Automatic in common coordinate system using iterative closest (ICP) algorithm its variants one frequently applied methods literature, number studies focus...
This study investigates the contribution of global geopotential models which are calculated with GOCE satellite mission data to improvement gravimetric geoid in Turkey. In this context, direct (DIR), time-wise (TIM), space-wise (SPW), and GOCO satellite-only model series were considered. The research was carried out two parts. first part includes validation each at 100 homogeneously distributed GNSS/leveling stations over country utilizing spectrally enhanced heights determine best...
In most of the countries, national height systems are referenced to mean sea level (geoid) whereas using GPS technique in positioning provides ellipsoidal heights. However, these heights h can be transformed into orthometric from geoid H depending on a simple relation among heights, and this transformation requires know undulations N ( = - ). The methods for deriving undulation at point various practicality method is one major concerns as well its precision. study, an experiment calculating...
High-accuracy and homogeneously distributed dense terrestrial gravity observations are essential data for detailed analysis of the Earth field as well precise modeling geoid, which is a natural datum point heights in geodetic surveying applications. Precise regional geoid related quality assessments still substantial issues many countries. The measurements Turkey have been carried out by different institutions; therefore, collected qualities standards. For this reason, archival consistency...
Abstract. In this study, we focus on sea level changes along the Black Sea coast. For purpose, at same observation period linear trends and components of seasonal variations change are estimated 12 tide gauge sites (Amasra, Igneada, Trabzon-II, Sinop, Sile, Poti, Batumi, Sevastopol, Tuapse, Varna, Bourgas, Constantza) located coast available altimetric grid points closest to locations. The consistency results derived from both observations investigated interpreted. Furthermore, in order...
This study investigated the accuracy improvement of gravimetric geoid model in Turkey using densified grids gravity anomalies with least-squares modification Stokes integral additive corrections (LSMSA) method. In LSMSA computations models, surface anomalies, which were derived from complete Bouguer anomaly grid data set by forward modeling topographic masses, used. computations, addition to original 5′-resolution (∼9 km) set, its versions 1′-resolution (∼2 also The densification was carried...