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An Electronic Navigational Chart (ENC) is a standardized database that can be used with an Electronic Chart Display & Information System (ECDIS) for applications such as navigation warning, efficient route planning for ship navigation, etc. An ENC contains all the required information for ship navigation. Route planning on the ENC is done with a consideration of the depth area, distance with isolated...
For eLoran to be truly useful as a backup system to GNSS it must offer significant coverage for accurate positioning. Research in differential-Loran is very new and, until we understand more about the characteristics of spatial decorrelation of differential corrections, Port Approach Phase eLoran will be limited in coverage area due to the assumed geographical range of validity of the differential...
The usage of filter techniques for position estimation for safety-relevant purposes is an extensive field of research. Depending on the needed application for the Global Navigation Satellite System (GNSS) the state estimation can be achieved by several techniques. State estimation by means of Kalman Filter (KF), as well as Extended Kalman Filter (EKF) and Particle Filter (PF) have been developed and...
To improve accuracy of navigation solutions such as position, velocity and attitude etc., various navigation techniques are developed. Among them, Global Positioning System (GPS) and Inertial Navigation System (INS) are widely used in general navigation system. Additionally, in nowadays, to provide more accurate navigation solution, Extend Kalman Filter (EKF) based GPS/INS coupled system which calibrates...
Although the GNSS/GPS had become the primary source for Positioning, Navigation and Timing (PNT) information in maritime applications, the ultimate performance of the system can strongly degrade due to space weather events, deliberate interference, shadowing, multipath and overall system failures. Within the presented work the development of an affordable integrated PNT unit for future on-board integrated...
A massive earthquake occurred in the Tohoku and Kanto regions of Japan on the 11th of March 2011. In response, a tsunami alert, a tsunami warning and an advisory were issued for the entire Pacific coast region. This research investigates the evacuation behavior of ships by AIS data in Sendai port after the tsunami warning was issued. The unusual behavior observed was attributed to the emergency evacuation...
SENDAI is a project funded by ESA under the European GNSS Evolution programme to develop algorithms and models for estimation of navigation satellites orbit and clock errors, and their failure rates.
GINESTRA and ERICA are two projects funded in the framework of the ALCANTARA Initiative of the European Space Agency. GINESTRA is a survey which aims to explore the capabilities of ionosphere monitoring in South East Asia to identify both institutions involved in this field and existing monitoring facilities. ERICA exploits the GINESTRA outcomes and aims to characterize the ionospheric variability...
MImOSA and MImOSA2 are two projects funded in the framework of the ALCANTARA Initiative of the European Space Agency. MImOSA (Monitoring the Ionosphere Over South America) was a competence survey aimed at assessing the capabilities of the South American (SA) countries to monitor and investigate the ionosphere. This was done to understand how the currently existing facilities could be integrated with...
The Global Positioning System (GPS) was Fully Operational Capacity (FOC) in 1995 and it remained for a long time the only GNSS that can be used by civilian users till 2007 when the Russian decided to support and provide an open access to civilian user without limitation on Global Navigation Satellite System (GLONASS). Satellite navigation technology is increasingly used almost in all sectors and activities;...
High latitude ionospheric irregularities of various scale sizes, which are mostly driven by the coupling processes between the solar wind and Earth's magnetic field, frequently result in phase scintillations over auroral oval and polar cap regions. Strong phase scintillations may cause a GNSS receiver to lose track of some satellites in view. Furthermore, rapid fluctuations in the ionospheric electron...
As a result of the continuously decreasing costs of sensors, the number of applications using multiple sensors for the determination of navigation parameters increases significantly. Examples are remotely piloted aircraft systems (RPAS), pedestrian navigation using smartphones, driver assistance systems within cars, etc. All applications have in common that the costs have to be minimized. Finding...
In the frame of the development of artificial intelligent (AI) based validation tool for Global Navigation Satellite Systems (GNSS) localisation systems MATLAB Simulink models for all the developed AI-based methodologies have been created. The combination of Artificial Neural Network (ANN) based validation tools with the Mahalanobis Ellipses Filter (MEF) methodology for accuracy-based data evaluation...
Global Navigation Satellite System (GNSS)-based navigation is usually carried out in open sky conditions, where one of the main error sources is introduced by the ionosphere. Ionospheric effect can be mitigated by combining two GNSS signals at different frequencies exploiting the dispersive behavior of the ionosphere. Unfortunately, most of the mass-market receivers do not benefit from this cancellation...
We are witnesses of a big boom in satellite navigation today. Current systems are updated with new signals, new systems are in development and new frequency bands are searched due a overcrowding of L-band. Current GNSS systems with full operational capacity are two yet. American GPS and Russian Glonass. GPS third generation with new L1C signal is ready to launch and Glonass is in preparation for its...
Transportation is the largest application field of satellite navigation at present, which has the characteristics of “large scale, multi-mode, wide range, high demand” and so on. Currently, Ministry of Transport of the People's Republic of China is promoting the construction of “Four Traffic (Comprehensive Traffic, Intelligent Traffic, Green Traffic and Safe Traffic)” and higher demand for the precision,...
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