The dynamic development of aviation caused fundamental transformation in present techniques and technologies in navigation. Already since 1995, GSP receivers have been introduced to the aircraft navigation systems, to be used as supplemented classical navigation aids. However, NATO Headquarters (STANAG 4550) require to use the majority of satellite radio navigation equipment between 2005 and 2007. The present air navigation system equipment has to be replaced as the satellite technique will form essential aid for air - navigation, enabling RNAV exercise flights. Along with Word trends as well as requirements of international aviation organizations, every aircraft should be equipped with a satellite receiver set. Also the dependent supervision equipment - ADS (Automatic Dependent Surveillance) depends on satellite technology. This kind of information is received through COMSAT and sent to the proper operator.s air traffic control centre. In turn, mainly in Sweden and In Germany airborne tests are performed with the use of DGPS technique, on one of the modules of an automatic unit of ADS - B (Automatic Dependent Surveillance - Broadcast), which is the derivative of ADS. The GPS deck receiver set is to be used as basic source of information about time in this unit. ADS - B network was created and tested in Northern Europe within the framework of the NEAN (Northern European ADS -B Network) project. The countries received the ADS - B network with enthusiasm, so in near future this navigation radars will replace traditionally used ones in air traffic control. An essential unit in the new system becomes the satellite technology and, in particular, GNSS (Global Navigation Satellite System) which begins to be used. There is a need for an entirely new approach to the issues connected with air traffic management, with the aim to solve the problems connected with expansion of the traffic capacity of airports and air routes as well as the existing and prospective European ATM systems. Therefore a document .Air Traffic Management Strategy for Years 2000 + was worked out, the aim of which is to create a uniform aerospace for Europe. Presented strategy also delivers precise guidelines and presents effective centers, thanks to which it is possible to cope with all current problems and to effectively face the challenges in front of the European ATM in 21st century. Then, on the basis of .Air Traffic Management Strategy for Years 2000 + regional undertakings began to be realized. For European countries the programme of CNS /ATM standardization and harmonization of actions carries the name .European Convergence and Implementation Plan 2004-2008. Based on this document, every country is obliged to study and to realize the state programme of CNS /ATM standardization and harmonization of actions named .Local Convergence and Implementation Plan.. Poland also participates in this programme and gradually fulfills its commitments or corrects approved undertakings. Recently, problems connected with GNSS (Global Navigation Satellite System) have been treated as a priority and they are contained in .Annex 10 to the Convention on International Civil Aviation. In the accepted international solutions it was assumed that the introduction of global ATM/CNS system should widely take into account present techniques and technologies and, at the same time its panel and module construction will make it possible to modernize the systems in the future. It is envisages that target functioning of the ATM/CNS system will be based on the following component units: GNSS, ASDLS, GEO, VDL, FMS, SSR, PSR, MCC, METEO, Mod S, GES, MLS, LAAS, WAAS, EGNOS, GALILEO, ATN, RMS, SMGCS, ACC. Modernisation also began in our country with the aim to create basis of the Polish ATM/CNS system, in which the network of permanent air-stations RTK DGPS will play a key role. The concept of DGPS system was worked out for the needs of aviation based on normative documents. The uniform global system of coordinates and world UTC time system are additional advantages, which make it possible for of armed forces in different states to take common actions and to carry out peaceful missions, to ensure safety in the communication routes and to serve many other purposes. The proposed RTK DGPS air-system realizes the C3I arrangement (Command, Control, Communications, Intelligence). It is necessary to emphasize that the C3I arrangement in the Polish system refers to set of functions concerning gathering, processing and dissemination of information, indispensable for functioning of aviation. Hence, it is required that the Polish RTK DGPS system consists of different types of interlinked steady and mobile operating centers (CKM - ASOC). The general structural pattern of the Polish air-network of permanent reference stations is presented in the paper. We are preparing an experiment connected with an approach to landing in Warszawa - Okęcie airport based on the Józefosław permanent station.