Leonardas Marozas

LitPOS – A part of EUPOS®

Abstract LitPOS (Lithuanian Positioning System), the network of permanent reference GNSS stations, became operational in July 2007. It provides data both for real‐time and post‐processing applications. LitPOS stations cover the whole territory of Lithuania. Total number of GNSS stations is 25, therefore the integration of some stations of neighbouring countries is foreseen. It is possible on the basis of cooperation in EUPOS® project. The European Position Determination System (EUPOS® ) project is an initiative and cooperation of currently 15 Central and Eastern European countries (CEE) and two German states that build up a ground‐based European regional GNSS augmentation system with uniform standards that will cover a territory of about 10 million square kilometers. EUPOS® provides a high‐quality differential GNSS information for high‐precision positioning and navigation usable in a large field of applications. To enlarge the EUPOS® activities transcending technical realizations the project EUPOS® – Inte...

Measurement Techniques of a European Sea Level Service Site in KLAIPEDA

The technical equipment including hardware and software of European Sea Level Service (ESEAS) station KLAIPEDA (KLPD) is presented in the paper. The tide gauge Klaipeda (previous name – Memel) was established in 1811 in the east part of the Baltic Sea, at the estuaries of Curonian Lagoon. KLAIPEDA ID number at the Permanent Service of Mean Sea Level (PSMSL) is 080161. Upgrading of the station is done according to the ESEAS-RI project (Contract No EVR1-CT-2002-40025). KLPD site was equipped with a digital float tide gauge, sea-water conductivity sensor, air temperature, pressure and humidity sensors, wind speed and direction sensor and GPS receiver with antenna. The four characters ID KLPD and IERS DOMES number 10802M001 was assigned to the permanent GPS station KLAIPEDA. Tide gauge KLAIPEDA was certified as ESEAS Operational Site in 2003. It provides near real time (hourly) data to corresponding data servers. The data warehouse system is built on Gentoo Linux, with Apache2, MySQL 4.0.22 and PHP 4.3.9. The communication structure and software applications are also presented in the paper.

Raising effectiveness of access control systems by applying multi-criteria decision analysis: part 1 – problem definition

AbstractCurrently, control of access to information and physical resources has become extremely important. Numerous methods and solutions for architecture of systems aimed at controlling physical access are available; however, there is little information about application of Multi-Criteria Decision Analysis methods when evaluating separate logical components, needed for the design of access control systems and their interconnection in the final architecture.This paper is the first part of a two-part article, discussing application of multi-criteria decision making for architecture of access control systems. The first part defines the problem and discusses the possibility to use Multi Criteria Decision Making techniques when designing access control systems, including risk analysis for specific criteria and practical application of the developed model. In the second part, the possible solution model will be presented.