Surveillance and Air Traffic Management Systems

To perform its activities for provision of air traffic services (ATS), BULATSA has 5 radar complexes and 1 secondary en-route radar, allowing to achieve a developed radar network and obtain a reliable picture of the serviced by the Republic of Bulgaria airspace. Along the country are stationed:

  • 3 Terminal Approach Radars (TARs) at Sofia, Varna and Burgas. They are comprised of a primary ATCR 33MI type radar and a secondary SIR-M radar, manufactured by the Italian company Leonardo (at that time - SELEX ES). Through them, full surveillance of the respective airports’ area of responsibility is assured. They are also used in the creation of the multiradar picture of the whole air space.
  • 2 En-Route Radar Complexes, situated on Cherni Vrah and in the Varbishki Passage. They are comprised of a primary ATCR 22MI type radar and a monopulse secondary surveillance radar CMSSR-401, manufactured respectively by the companies Leonardo (SELEX ES) and THALES (then CARDION). These radar complexes cover the territory of the Republic of Bulgaria to a sufficient extent and play a significant role in the air traffic management.
  • At Plovdiv airport is situated a monopulse secondary surveillance radar CMSSR-401 of the company THALES (CARDION). It supplements the whole radar picture.

In BULATSA is underway a modernization of the radar complexes, within which shall be delivered primary and secondary surveillance radars for the En-Route Radar Complex “Cherni Vrah”. The same complex will be delivered and installed at the En-Route Radar Complex "Varbitsa". A completely new radar complex will be built at Sofia airport, including delivery and installation of primary surveillance radar STAR2000 and secondary surveillance radar operating under mode S RSM970S of the company THALES.

Two Meteor 306AC meteorological radars of the company Leonardo (at that time - GEMATRONIK) are in exploitation in Sofia Air Traffic Control (ATC) Centre and Varna ATC Centre. They provide current meteorological information for air traffic management purposes and were modernized in 2010.

At Sofia airport, a radar for surveillance of the ground movements within the air field is installed and used, with the purpose of facilitating the air traffic management during low visibility conditions.

The air traffic management over the territory of the country is provided by modern systems for processing and displaying surveillance and flight information. At Sofia ATC Centre, Varna and Burgas ATC Centres in exploitation is the air traffic management system SATCAS, procured by the company Leonardo. Following the requirements of the National Programme for Implementation of the Single European Sky and the EU regulations on the tools and systems for securing the air traffic management activities, BULATSA performed a modernization of its air traffic management system - SATCAS, which enabled the implementation of new functionalities, improvement the system performance and increase of the level of safety in ATS.

Forthcoming is the putting into operation of a new Advanced-Surface Movement Guidance and Control System (A-SMGCS), with functionalities for surveillance and control of the aircraft and other motor vehicles on the maneuvering area at the airport.