National Space Facilities Control And Test Center

Positioning & Timing and Navigation System of Ukraine (PTNSU). Prospects of entering the European programs


Within the framework of the National State Scientific and Technical Space Program of Ukraine, the Positioning & Timing and Navigation System of Ukraine (hereinafter referred to as PTNSU) that utilizessignals from global navigation satellite systems, was developed and commissioned by the State Space Agency of Ukraine.

At the moment, the PTNSU has been certified and transferred to the National Space Facilities Control and Test Center (hereinafter referred to as NSFCTC). The functions of the operator and the operating organization of the PTNSU are assigned to the Center for Special Information Reception and Processing and Navigation Field Control.

The PTNSU is intended to monitor the state of the radionavigation field formed by the GPS and GLONASS systems and to provide the GNSS users with additional differential correction information necessary to increase the accuracy and reliability of the location determination in real time.

At the moment, the PTNSU, which operates in the mode of experimental exploitation, includes the Main and Reserve control centers of the navigation field (Dunaivtsiand Kharkiv) and 10 control and correction stations (Kharkiv, Dunaivtsi city in Khmelnytskyoblast, Yavoriv city inLviv oblast, Chernihiv,Izmail city in Odessa oblast, Mukachevo, Vinnytsia, Kropyvnytskyi, Zaporizhia, Gorodok s.m.t. in Zhytomyr oblast).

On the basis of the Agreement on the Establishment of the National Unified GNSS Network, which the NSFCTC concluded with the Main Astronomical Observatory of National Academy of Sciences of Ukraine and JSC “System Solutions”, in addition to information from the network of Control and Correction Stations (hereinafter referred to as the CCS) belonging to the NSFCTC, information can be obtained on a contractual from individual reference stations (hereinafter referred to as RS) that are part of the partner networks, the information of which is also processed at the Main and the Backup Centers for Navigation Field Control.

As a result, the Main and the Backup Centers for Navigation Field Control can now provide on the request of users the differential correction information (hereinafter – DCI) on more than 90% of the territory of Ukraine in real time. In the long run, after joining the National united GNSS network of other partners, full coverage of the territory of Ukraine by satellite navigation information services will be possible.


Users of the PTNSUcan be provided in real time or post-session regimes with raw information that was registered by CCSas well as with any information out of 4 possible types of DCI that is generated by the software of the Main and the Backup Centers for Navigation Field Control and delivered to users by the Internet in the RTCM format navigation message indifferent versions:

  • Wide-area DCI, which is produced on the basis of raw GNSS information obtained from all NSFCTCT CCSs and RSs from partner networks (under the Agreement on the Establishment of the National Unified GNSS Network). The calculation of the corrections of the navigation parameters of the GNSS satellites is carried out on the user’s navigation equipment according to the FKP algorithm, according to which the corrections are calculated for one of the specified by Central CCNP operator as the central point of the network of CCS (or RS, there is no difference here). The coordinates of the center point are transmitted as part of the navigation message in the RTCM v.2.1format;
  • Areal DCI, which is produced on the basis of raw GNSS data received from several NSFCTC CCS and involved RS partners to provide the services of a separate zone on the territory of Ukraine. The algorithm for zoning DCI is similar to the algorithm for generating wide-area DCIs, with this zone being a circle on the Earth’s surface with a center in geographic pointgiven byGNSS operator, whose coordinates are the source data for the operation of the navigation equipment of the user when calculating the corrections of navigational parameters of the satellites GNSS and also transmitted to users in A navigation message in the RTCM v.2.1format;
  • Local DCI (otherwise DGNSS), which is produced directly by the navigational receiver of the CCS by code measurement of the navigational parameters of the GNSS, and also transmitted to users in the navigation message in the RTCM v.2.1format;
  • Phase DCI (otherwise RTK), is produced directly by the navigational receiver of the CCS using the phase measurements of the navigational parameters of the GNSS, and also transmitted to users in the navigation message in the RTCM v.2.3format.

Users may also be provided with information in the RTCM v.3.0 format, which includes both GNSS raw information and a local or phase DCI.

The PTNSU configuration allows users who have access to the Internet and equipped with appropriate satellite navigation equipment to achieve precision locational values ​​up to 1 m in a territory that is limited to the angular position of the CCS and the RS that are the most separated from the center (for the wide zone and areal DSI) , submetric level at a distance of up to 150 km from the CCS for the local DCI (that is, calculated in the DGNSS mode), and the centimeter accuracy level in the 30 km area near the CCS, which provides the Phase DCI (ie, calculated in RTK mode).

The results of the monitoring of the state of the controlled GNSS, as well as the PTNSU  itself, the achievable accuracy of the local determination of the users of GNSS in the territory of Ukraine in real time, the statistics of user queries are displayed on the websites of Main and the Backup Centers for Navigation Field Control.

The plan of measures for the implementation of the Association Agreement between Ukraine, on the one hand, and the European Union, the European Community, on the other hand, for 2014-2017, approved by the Resolution of the Cabinet of Ministers of Ukraine dated September 17, 2014, No. 847-r of the State Space Agency of Ukraine, was designated as the person responsible for the implementation of measures with the expansion of EGNOS functional satellite systems on the territory of Ukraine (p. 320 of the Action Plan).

In pursuance of clause 320 of this Action Plan of the State Space Agencyof Ukraine prepared and submitted to the European side offers on possible locations of RIMS stations of the EGNOS system on the territory of the NSFCTC and SSAU facilities (Center for Special Information Reception and Processing &Navigation Field Control&Main Special Monitoring Center).


In case of RIMS stations of the EGNOS system deployment on the territory of NSFCTC facilities territory, following will be provided:

  • security (storage);
  • technical maintenance by trained personnel;
  • power supply;
  • communication channels and information transmission;
  • other necessary conditions for the RIMS stations functioning.

According to its technical capabilities, the PTNSU will be able to record and evaluate the quality of the information of the EGNOS system after the EGNOS system is extended to Ukraine.

It should be noted that in accordance with clause 2 of Article 11 of the Agreement on Cooperation on the Civil Global Navigation Satellite System (GNSS) between Ukraine and the European Community, its member states, EGNOS is to be extended to the region of Ukraine through ground infrastructure using Ukrainian monitoring stations of integrity.

Agreement between NSFCTC, Main Astronomical Observatoryof National Academy of Sciences of Ukraine and JSC System Solutions;

Agreement between Ukraine and the EU on cooperation in sphere of civilianGNSS.


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