In order to optimize the data processing within the EUREF Permanent Network, the principle of distributed processing is used. In this approach the EPN is divided in subnetworks which are separately processed by different EPN Local Analysis Centres (LACs).
The below mentionned EPN LACs all process a subnetwork out of the EPN following the rules and guidelines set up by the International GPS Service and supplemented by the EUREF Technical Working Group. They submit weekly free-network solutions (SINEX format) to the EPN Regional Data Centre BKG (availability).

The EPN Analysis Coordinator (Heinz Habrich from BKG) is responsible for combining the EPN subnetwork solutions into the official combined EPN solution. This weekly solution is tied to the most recent realisation of the ITRS and is made available as SINEX files to the IGS.

• Statistics showing the agreement of the LAC solutions with the combined EPN solution.
• Table showing the data processing distribution for each station.
• E-mail exchanges between EPN LAC's.

EPN Local Analysis Centres (EPN LAC) routinely submitting solutions		LAC file	Network
ASI	Centro di Geodesia Spaziale G. Colombo, Matera - Italy The Centro di Geodesia Spaziale processes a European subnetwork comprising IGS and EPN stations in the South of Europe. Their solutions are incorporated in EUREF since September 1996.	Yes	available
BEK	Bayerische Kommission für die Internationale Erdmessung of the Bavaria Academy of Science, Munich - Germany The Bayerische Kommission für die Internationale Erdmessung of the Bavarian Academy of Science in Munich has been the Computing Center for the computation of the unified European Triangulation Network RETrig. It was also involved in the computation of the EUREF-89 GPS campaign. Since end of 1995, BEK has been producing weekly solutions of a EPN subnetwork.	Yes	available
BKG	Bundesamt für Kartographie und Geodäsie - Germany BKG has acquired the capacity to routinely process permanent IGS networks. Since early 1996 it has been processing part of the European Network on a weekly basis.	Yes	available
COE	Centre for Orbit Determination in Europe, Astronomical Institute of the University of Bern - Swizerland CODE is processing almost the complete European Permanent Network in order to create a reference solution which is used as a comparison for the solutions of the other EPN Local Analysis Centres. The Center for Orbit Determination in Europe is a joint operation of the four institutions : Astronomisches Institut (AIUB), Universität Bern, Switzerland Bundesamt für Landestopographie (L+T), Wabern, Switzerland Institut für Angewandte Geodäsie (IfAG), Frankfurt, Germany Institut Geographique National (IGN), Paris, France and is, as one of the IGS Analysis Centers, routinely performing global analysis of the IGS network.	Yes	available
GOP	Geodetic Observatory Pecny, Pecny - Czech Republic The Geodetic Observatory Pecny is processing permanent stations since February 1997.	Yes	available
IGE	Instituto Geográfico Nacional de España - Spain The Instituto Geográfico Nacional de España started its contribution to the EUREF combined solution since September 2001 (GPS Week 1130).	Yes	available
IGN	Institut Géographique National - France Since January 1998 the LAREG (Laboratoire de Recherche en Geodesie) processes a network of permanent French stations. It has started its contribution to the EUREF combined solution since November 1998 (GPS Week 982).	Yes	available
LPT	Bundesamt für Landestopographie, Wabern - Switzerland	Yes	available
MUT	Military University of Technology - Poland Since December 2009 MUT LAC (GPS Week 1560) analyses data from several EPN stations distributed evenly along the Europe.	Yes	available
NKG	Nordic Geodetic Commission, Lantmäteriet and Onsala Space Observatory - Sweden The NKG analysis centre is processing since December 1996 (GPS-week 886) a network of EPN and IGS stations in northern Europe. In addition, a more dence network of national permanent GNSS stations in Sweden, Denmark and Norway is processed.	Yes	available
OLG	Institute for Space Research (ISR/ASS), Graz - Austria The ISR/AAS is the official data centre and one of the analysis centres of CERGOP/CEI. Since mid of January 1996 daily subnetwork solutions for all permanent Austrian GNSS stations and some surrounding IGS and CEGRN station have been computed routinely. Since mid of May 1996 weekly results have been delivered for inclusion into a EPN solution.	Yes	available
RGA	Republic Geodetic Authority and University of Belgrade Faculty of Civil Engineering - Serbia The RGA analysis centre is processing since April 2011 (GPS-week 1632) its EPN subnetwork, which is composed of stations located mainly in southern and eastern Europe.	Yes	available
ROB	Royal Observatory of Belgium, Brussels - Belgium The Royal Observatory of Belgium is processing the four permanent stations operated in Belgium together with a number stations of the EUREF network since February 1996.	Yes	available
SGO	FOMI Satellite Geodetic Observatory, Budapest - Hungary The FOMI Satellite Geodetic Observatory is processing since December 2001 (GPSweek 1143) a network of stations distributed mainly in Eastern and Southern Europe.	Yes	available
SUT	Slovak University of Technology, Bratislava - Slovakia The Slovak University of Technology is processing since September 2002 a network of selected EPN and IGS stations in Central Europe completed by EPN stations situated mainly in western and nothern Europe.	Yes	available
UPA	University of Padova, Padova - Italy The University of Padova is processing since January 1999 a network of Italian stations and additional stations distributed along the Alps.	Yes	available
WUT	Warsaw University of Technology, Warsaw - Poland Warsaw University of Technology has been EUREF Local Analysis Centre since January 1996. WUT LAC submits to EUREF weekly and daily results of its EPN subnetwork, which is mainly composed of stations located in Central Europe.	Yes	available

EPN Local Analysis Centres (EPN LAC) not routinely submitting solutions		LAC file	Network
DEO	Delft Institute for Earth-Oriented Space Research, Delft - The Netherlands (no submission since GPS week No 1546) The Delft Institute for Earth-Oriented Space Research, a research group of Delft University of Technology, has started to process GPS networks on a regular basis since 1994. Currently, DEOS is processing several permanent and campaign networks in Europe and South-East Asia. A dedicated solution is incorporated in EUREF since February 2001.	Yes	available