Paper presented at the 21st EUREF Symposium held in Chisinau, Moldova, 25–28 May 2011 NATIONAL REPORT OF SLOVENIA to the EUREF 2011 Symposium in Chisinau K. MEDVED 1 , K. BAJEC 2 , S. BERK 2 , D. RADOVAN 2 , B. STOPAR 3 1 Introduction This paper is the review of activities regarding the adoption of the ESRS and other related activities in Slovenia, during the period 2010–2011. Activities presented in this report were partially supported by a grant from Norway through the Norwegian Financial Mechanism. A four-year project of establishing the national network of permanent GNSS-stations and the European Spatial Reference System in Slovenia finished at the end of 2010. 2 The SIGNAL Positioning Service The SIGNAL network of GNSS stations is owned by the Surveying and Mapping Authority of the Republic of Slovenia (SMARS) and operated by the Geodetic Institute of Slovenia. The network consists of 15 stations. Five of them support GPS and GLONASS signal tracking and the others GPS signal tracking only. At the moment, 12 additional stations from the neighbouring countries are included in the network: five Austrian (APOS) stations, one Hungarian (GNSSnet.hu) station, and six Croatian (CROPOS) stations, see Figure 1. Figure 1: Currently used stations in the SIGNAL network. Croatian station (Zagreb) would be used if needed – in case of failure of any of the neighbouring stations. Five more stations from Italy (Friuli Venezia Giulia) are now being used for testing purposes. So, a total of 33 stations can be used in the current SIGNAL network configuration. 1 Surveying and Mapping Authority of the Republic of Slovenia 2 Geodetic Institute of Slovenia 3 University of Ljubljana, Faculty of Civil and Geodetic Engineering