Modernization of the Estonian National GNSS Reference Station Network

    Jaanus Metsar Affiliation
    ; Karin Kollo Affiliation
    ; Artu Ellmann Affiliation


The first GNSS (Global Navigation Satellite System) CORS (Continuously Operating Reference Station) in Estonia became operational in 1996. Starting from 2008 four Estonian CORS are incorporated into the EPN (EUREF Permanent GNSS Network). During the years 2014-2015 modernization of the GNSS CORS in Estonia was carried out. Currently the total number of the resulting ESTPOS reference stations is 28. These ESTPOS stations were interconnected to the I order national geodetic network by a special GNSS campaign in 2017. The maintenance and compilation of the ESTPOS based research products is explained. Aspects of the ESTPOS usage, including also the real time surveys, are discussed. Comparisons with SWEPOS (Swedish national GNSS CORS) and FinnRef (Finnish national GNSS CORS) networks indicate possibilities for further ESTPOS developments.


How to Cite
Metsar, J., Kollo, K., & Ellmann, A. (2018). Modernization of the Estonian National GNSS Reference Station Network. Geodesy and Cartography, 44(2), 55-62.
Published in Issue
Aug 8, 2018
Abstract Views
PDF Downloads
Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.


Bruyninx, C., Altamimi, Z., Caporali, A., Kenyeres, A., Legrand, J., & Lidberg, M. (2013). Guidelines for EUREF densifications. Retrieved from

Ellmann, A. (1997). Suurupi GPS püsivaatlusjaam [Suurupi GPS reference station]. Geodeet, nr. 12.

Ellmann, A., Märdla, S., & Oja, T. (submitted). The 5 mm geoid model for Estonia computed by the least squares modified Stokes formula. Submitted to Survey Review.

Ellmann, A., Pihlak, P., & Kollo, K. (2008). Kõrgtäpsed GPS-mõõtmised riigi geodeetilise põhivõrgu aluspunktidel 2008. aasta suvel [GPS remeasurement campaing on national geodetic points in the summer of 2008]. Geodeet, nr. 37.

EPN. (2018). EPN Tracking network. Retrieved from

EUREF. (1999). Symposia – Resolutions. Prague, 2–5 June 1999. Retrieved from resolutions_prague1999.pdf

Geosoft. (2018). Trimble VRS Now. Retrieved from

I.V.A. Leon. (2018). IVANET. Retrieved from

Kirs, E. (2017). Eesti RTK GNSS võrkude täpsuse hindamine [Accuracy evaluation of RTK GNSS networks in Estonia]. Tartu.

Koivula, H., Laaksonen, A., Lahtinen, S., Marila, S., & Kuokkanen, J. (2017). Finnish permanent GNSS network, FinnRef. Retrieved from /TS07C_koivula_laaksonen_et_al_8939_ppt.pdf

Kollo, K., & Pihlak, P. (2008). Ülevaade geodeetiliste põhivõrkude töödest 2007–2008 [Overview of works done on national geodetic networks in 2007–2008]. Geodeet, nr. 37.

Kutterer, H. (2017). GGOS – The global geodetic observing system of the International Association of Geodesy (IAG). Retrieved from TS03C_kutterer_9127.pdf

Lahtinen, S., Pasi, H., Jivall, L., Kempe, C., Kollo, K., Kosenko, K., Pihlak, P., Prizginiene, D., Tangen, O., Weber, M., Paršeliunas, E., Baniulis, R., & Galinauskas, K. (2018). First results of the Nordic and Baltic GNSS Analysis Centre. Journal of Geodetic Science, 8(1).

Landau, H., Vollath, U., & Chen, X. (2002). Virtual reference station systems. Journal of Global Positioning Systems, 1(2), 137-143.

Lantmäteriet. (2018). SWEPOS. Retrieved from

Leica Geosystems. (2008). RTK Networks – different methods. System 1200 Newsletter, No. 53, BU surveying, surveying & engineering division, pp. 1-6.

Leica Geosystems. (2018). Leica GNSS Spider. Retrieved from

Lilje, M., Wiklund, P., & Hedling, G. (2014). The use of GNSS in Sweden and the national CORS network SWEPOS. Retrieved from

Madsen, F., & Madsen, B. (1993). A new GPS-network in the Baltic Countries. In E. Gubler, H. Hornik (Eds), Report on the Symposium of the IAG Subcommission for European Reference Frame (EUREF) held in Budapest, 17–19 May 1993, Veröff. Bayr. Komm. Intern. Erdmessung. EUREF Publ. No. 2, München, pp. 83-91.

Metsar, J. (2015). Riiklik GNSS püsijaamade võrk, selle aegridade kasutamine jääajajärgse maatõusu täpsustamisel [National GNSS reference station network, using its time series for specifying post-glacial land uplift]. Tallinn.

Metsar, J., & Kollo, K. (2017). Riigi geodeetilise võrgu I klassi kordusmõõtmised 2017 [Remeasurement campaing of first order national geodetic network in 2017]. Estonian Land Board.

Metsar, J., Kollo, K., & Ellmann, A. (2016). GNSS aegridade kasutamine jääajajärgse maatõusu täpsustamisel [Using GNSS reference station time series for specifying post-glacial land uplift]. Geodeet, nr. 45/46.

Metsar, J., Priit, P., & Kollo, K. (2018). Riigi geodeetilise põhivõrgu I klassi kordusmõõtmiste arvutused [Computations of first order geodetic network remeasurement campaign]. Estonian Land Board.

Moser, V., Barišić, I., Rajle, D., & Dimter, S. (2016). Comparison of different survey methods data accuracy for road design and construction. In 4th International Conference on Road and Rail Infrastructure – CETRA 2016. Šibenik, Croatia.

National Land Survey of Finland. (2018). FinnRef GNSS Stations. Retrieved from

Rüdja, A. (1999). A new ETRS89 system for Estonia. Report on the Symposium of the IAG Subcomission for the European Reference Frame (EUREF) held in Prague 2–5 June 1999. Veröff. Bayr. Komm. Intern. Erdmessung. EUREF Publ. 8. München, pp 123-135.

Rüdja, A. (2002). Integrated Georeference of Estonia. In Proceedings of the 14th General Meeting of the Nor dic Geodetic Commission. 1–5 October 2002. Espoo, Finland, Kirkonummi, pp. 201-210.

Sobak, M., Ellmann, A., Mill, T. (2015). Terrestrial laser scanning assessment of generalization errors in conventional topographic surveys. Geodesy and Cartography, 41(1), 15-24.

Topcon. (2018). HadNet. Retrieved from