Jacek Lubczonek

Radar sensors implementation in river information services in Poland

Implementation of River Information Services in Poland on area of Lower Odra river according to RIS Directive was done in 2014. Several kinds of sensors was used during system construction like AIS base station, CCTV cameras, FMCW radars, radar water level gauges, hydro meteorological station. In the article problems of radar sensors - surveillance radar and radar water level sensors implementation are described.

Application of modified method of viewshed analysis in radar sensor network planning on inland waterways

The paper presents application of the modified visibility analysis, which includes basic radar image distortion and allows performing the appropriate analyses during the spatial planning of radar sensors. Lack of such analysis can lead to incorrect adjustment of the amount of sensors or their technical parameters. Presented method was practically used for radar network planning on inland waters in Poland.

Application of GIS techniques in VTS radar stations planning

The paper presents the method of radar station location by using the viewshed analysis. It was conducted on the basis of a three-dimensional virtual map and digital surface model. An exemplary spatial analysis presents results of location of the radar scanners in the port of Szczecin. The image of view-shed analysis was also compared with real radar image.

Verification of marine multiple model neural tracking filter for the needs of shore radar stations

The paper presents the research aiming at verification of multiple model neural filter in shore radar systems. Proposed method is shortly presented, the requirements of IALA for shore VTS radars are showed and the results of numerical experiment are given. According to IALA recommendation the method was tested during simulation with Monte Carlo method. PC simulator of target tracking was used. The results of experiment confirms that multiple model neural filter complies with IALA regulations. At the end future e development of the research was proposed.

FMCW radar implementation in River Information Services in Poland

River Information Services (RIS) were implemented in Poland in 2013 on the lower part of the river Oder. Their numerous system sensors include FMCW radars. Shore based radars provide data for various services, such as traffic information, traffic management and calamity abatement support. The Polish RIS system uses the 4G™ FMCW radars. Considering their low output power, small size, weight and width of the radar beam, they appear best suited for the system. The stretches of waterways covered by the radars are located in urbanized, harbour and non-urbanized areas. The RIS implementation included deployment of nine radar sensors on bridges, two on masts, and one on a building. The article presents experience after the first year of operation of FMCW radars in the Polish RIS system.

Radar sensors planning for the purpose of extension of River Information Services in Poland

The first section of the River Information Services (RIS) system in Poland was implemented in 2013 in an area of 97.5 km of waterways on the river Oder from the city of Szczecin up to the town of Ognica. Three options of the RIS extension towards the south are under development. Each option incorporates the FMCW radars. This article presents an analysis of the FMCW radar site planning.

Comparison of selected clustering algorithms of raw data obtained by interferometric methods using artificial neural networks

The article presents a particular comparison of selected clustering algorithms of data obtained by interferometrie methods using artificial neural networks. For the purposes of the experiment original data from Szczecin Port have been tested. For collecting data authors used the interferometric sonar system GeoSwath Plus 250 kHz. GeoSwath Plus offers very efficient simultaneous swath bathymetry and side scan seabed mapping. During the use of Kohonens algorithm, the network, during learning, use the Winner Take All rule and Winner Take Most rule. The parameters of the tested algorithms were maintained at the level of default. During the research several populations were generated with number of clusters equal 9 for data gathered from the area of 100m2. In the subsequent step statistics were calculated and outcomes were shown as spatial visualization and in tabular form.

Analysis of accuracy of surveillance radar image overlay by using georeferencing method

Shore-based radars are the key element of vessel traffic management systems, such as the VTS. To present a true visualisation of the environment and location of radar-detected targets, a radar image needs appropriate calibration. The image itself may be subject to various distortions, including systemic ones. This paper presents a study of usefulness of various georeferencing methods in the determination of radar image distortions and assessment of the accuracy of surveillance radar image overlay.

Comparative analysis of radar image compression methods

Functionalities of radar systems include distribution and archiving of images. Radar equipment often operates in continuous mode, e.g. in VTS and RIS systems or on vessels, and gathers a large quantity of image data which occupies a lot of disc space. This paper presents an analysis of radar image compression methods used mainly in marine and inland navigation systems, which enables assessment of the effect of compression on the quality and size of radar images.

Location determination of radar sensors by using LIDAR data

Radar sensor location planning is the first stage of sensor network designing. Observational sensors, i.e. radars, often need to perform spatial analyses to determine an effective surveillance of an area. Currently remote sensing sensors, like airborne LIDAR, are able to collect high density data of the Earth surface. In this paper is analysed application of LIDAR data for determination of radar sensor location.