1. EPN Central Bureau IGS Analysis Workshop 2008, Miami Royal Observatory of Belgium C. Bruyninx, J. Legrand, F. Roosbeek EPN Central Bureau Royal Observatory of Belgium http://epncb.oma.be/ GNSS Network Management Procedures: Application to the EPN

2. EPN Central Bureau IGS Analysis Workshop 2008, Miami Royal Observatory of Belgium 203 permanent GNSS stations 30 % GPS+GLONASS 91 % hourly 44 % real-time 40 % IGS 38 countries Background > Status > Guidelines > Tracking > Monitoring > Summary Real-time Hourly Daily Background > Status > Guidelines > Tracking > Monitoring > Summary BACKGROUND > GUIDELINES > NEW STATIONS > MONITORING > SUMMARY

3. EPN Central Bureau IGS Analysis Workshop 2008, Miami Royal Observatory of Belgium Site guidelines – Difference between IGS and EPN guidelines Hourly and daily data flow 2004-2005 Dependence on one regional data centre Guidelines for real-time data2006 EUREF-IP Pilot Project Antenna Calibrations2006 IGS switch to APCV Background > Status > Guidelines > Tracking > Monitoring > Summary BACKGROUND > GUIDELINES > NEW STATIONS > MONITORING > SUMMARY IGS ≠ EPN

4. EPN Central Bureau IGS Analysis Workshop 2008, Miami Royal Observatory of Belgium Dec. 2004: guidelines Spring 2005: implementation Background > Status > Guidelines > Tracking > Monitoring > Summary BACKGROUND > GUIDELINES > NEW STATIONS > MONITORING > SUMMARY DATA FLOW

5. EPN Central Bureau IGS Analysis Workshop 2008, Miami Royal Observatory of Belgium Result: -2 regional data centers : OLG (Austria) and BKG (Germany) 95% 99% (BRST, BSCN,CAGZ,KELY, PUYV, QAQ1, RABT, THU3, TRAB, VFCH) (REDU, TRAB) Background > Status > Guidelines > Tracking > Monitoring > Summary BACKGROUND > GUIDELINES > NEW STATIONS > MONITORING > SUMMARY ANTENNA

6. EPN Central Bureau IGS Analysis Workshop 2008, Miami Royal Observatory of Belgium - EUREF-IP Pilot Project : 2002-2007 - Today: real-time data dissemination part of routine EPN operations EPN Site Guidelines: - 3 new network components Local Broadcaster, Regional Broadcaster (www.euref-ip.net),High Rate Data Centre (ftp://igs.bkg.bund.de/EUREF/highrate/yyyy/DOY/H/) - EPN real-time streams → Regional Broadcaster → Users - Min. Requirement: 1 Hz data, full code and carrier phases - Format: RCTM 2.X (X=1,2,3), RCTM 3.X (X=0,1), SOC, RAW Converter to RINEX needs to be freely available Background > Status > Guidelines > Tracking > Monitoring > Summary BACKGROUND > GUIDELINES > NEW STATIONS > MONITORING > SUMMARY REAL-TIME

7. EPN Central Bureau IGS Analysis Workshop 2008, Miami Royal Observatory of Belgium November 2006IGS switch to APCV Absolute calibrations converted field calibrations (elev dependency, probl. below 10°) True absolute calibrations (elev+azimuthal dependency), eg GEO++ For IGS stations: IGS CB can distribute type absolute calibration values (GEO++) for antenna/radomes BUT for EPN stations : EPN CB can NOT publish absolute type calibrations (GEO++) for antenna/radome included in the EPN, but not in IGS Background > Status > Guidelines > Tracking > Monitoring > Summary BACKGROUND > GUIDELINES > NEW STATIONS > MONITORING > SUMMARY ANTENNA

8. EPN Central Bureau IGS Analysis Workshop 2008, Miami Royal Observatory of Belgium Abs. calib. from robot 69% Converted field calib. 16% Uncal. pairs 15% Nov. 2006 Background > Status > Guidelines > Tracking > Monitoring > Summary BACKGROUND > GUIDELINES > NEW STATIONS > MONITORING > SUMMARY ANTENNA

9. EPN Central Bureau IGS Analysis Workshop 2008, Miami Royal Observatory of Belgium EUREF objectives: Reduce # of antenna/radome combinations without known absolute robot calibrations and work towards long-term improvement of network Need to find a solution for (future) EPN stations with known abs. type calibr. but not included in IGS network New EPN guidelines (Dec 2006): All antenna/radome combinations introduced within EPN station after Dec 5, 2006 must have TRUE absolute calibrations (taking radome into account). Use IGS ATX complemented with absolute individual antenna/radome calibrations for EPN stations Background > Status > Guidelines > Tracking > Monitoring > Summary BACKGROUND > GUIDELINES > NEW STATIONS > MONITORING > SUMMARY ANTENNA

10. EPN Central Bureau IGS Analysis Workshop 2008, Miami Royal Observatory of Belgium May 2008 Indiv. abs. calib 8% True abs. calib 69 % 77% Calib. from field11% No calib. 12% Dec. 2006 Indiv. abs. calib., 5% True abs.calib 64% 69% Calib. from field14% No calib.17% Background > Status > Guidelines > Tracking > Monitoring > Summary BACKGROUND > GUIDELINES > NEW STATIONS > MONITORING > SUMMARY ANTENNA

11. EPN Central Bureau IGS Analysis Workshop 2008, Miami Royal Observatory of Belgium GEO++ letter to IGS August 2 nd, 2007 Background > Status > Guidelines > Tracking > Monitoring > Summary BACKGROUND > GUIDELINES > NEW STATIONS > MONITORING > SUMMARY ANTENNA

12. EPN Central Bureau IGS Analysis Workshop 2008, Miami Royal Observatory of Belgium Procedure for inclusion of new EPN stations: 1.Commitment letter (5 years) Location in EPN, co-locations, connection to national and European levelling network GNSS receiver and antenna/radome type + calibration Planned data flow 2.Site log 3.Operational Centre Form 4.Digital Station Pictures 5.If site log is approved : Start daily+ hourly data flow to primary and secondary data centres + real-time data flow to real-time broadcaster 6.EPN CB verifications 7.Once passed the EPN CB verifications, EPN ACs are contacted (3 ACs needed) 8.EUREF mail to announce new EPN station Background > Status > Guidelines > Tracking > Monitoring > Summary BACKGROUND > GUIDELINES > NEW STATIONS > MONITORING > SUMMARY PROCEDURE

13. EPN Central Bureau IGS Analysis Workshop 2008, Miami Royal Observatory of Belgium EPN CB Verifications DailyHourlyReal-time Availabilityxxx Latencyxxx Meta-dataxx Qualityx Daily&hourly metrics 90% availability requested in 2 RDC 90% below 10 min. latency (hourly) Last 7 days Real-time metrics 90% availability at regional broadcaster Latency: Simulate user and download stream using 2-hour samples Background > Status > Guidelines > Tracking > Monitoring > Summary BACKGROUND > GUIDELINES > NEW STATIONS > MONITORING > SUMMARY VERIFICATIONS

14. EPN Central Bureau IGS Analysis Workshop 2008, Miami Royal Observatory of Belgium OSJE (Croatia) RTCM3.0 0.5 s BRUS (Belgium) RTIGS 1.8 s BELL (Spain) RTCM3.0 3.5 s Background > Status > Guidelines > Tracking > Monitoring > Summary BACKGROUND > GUIDELINES > NEW STATIONS > MONITORING > SUMMARY VERIFICATIONS

15. EPN Central Bureau IGS Analysis Workshop 2008, Miami Royal Observatory of Belgium EPN CB Verifications DailyHourlyReal-time AvailabilityBKG/OLGxx Latencyxxx Meta-dataxx Qualityx Daily Meta-data verification: RINEX data versus site logSimilar to IGS but, including antenna serial number! Real-time (RTCM format) antenna/radome type, antenna height, station coordinates 2 hour samples Background > Status > Guidelines > Tracking > Monitoring > Summary BACKGROUND > GUIDELINES > NEW STATIONS > MONITORING > SUMMARY VERIFICATIONS

16. EPN Central Bureau IGS Analysis Workshop 2008, Miami Royal Observatory of Belgium EPN CB Verifications DailyHourlyReal-time Availabilityxxx Latencyxxx Meta-dataxx Qualityx Background > Status > Guidelines > Tracking > Monitoring > Summary BACKGROUND > GUIDELINES > NEW STATIONS > MONITORING > SUMMARY VERIFICATIONS

17. EPN Central Bureau IGS Analysis Workshop 2008, Miami Royal Observatory of Belgium Data quality verification : - Teqc-based - tracking plots Tracking at low elevations: - elevation cut off angle - L2 -obstructions Background > Status > Guidelines > Tracking > Monitoring > Summary BACKGROUND > GUIDELINES > NEW STATIONS > MONITORING > SUMMARY VERIFICATIONS

18. EPN Central Bureau IGS Analysis Workshop 2008, Miami Royal Observatory of Belgium Stations are not included in EPN as long as all criteria are not fulfilled Background > Status > Guidelines > Tracking > Monitoring > Summary BACKGROUND > GUIDELINES > NEW STATIONS > MONITORING > SUMMARY SUMMARY

19. EPN Central Bureau IGS Analysis Workshop 2008, Miami Royal Observatory of Belgium EPN CB Web site = gateway to all information about EPN sites Verifications continue after station is included in EPN Complemented with results of other agencies contributing to EPN time series (rapid, long-term) ZTD biases Automated site logs test/submission through email for IGS stations copy to IGS CB Web-based site log submission under development No automatic emails to station managers reduce # of false alarms & automatic filter to trash but time consuming Background > Status > Guidelines > Tracking > Monitoring > Summary BACKGROUND > GUIDELINES > NEW STATIONS > MONITORING > SUMMARY WEB

20. EPN Central Bureau IGS Analysis Workshop 2008, Miami Royal Observatory of Belgium EUREFmail Monthly reports on latency of hourly data Weekly reports on availability and meta-data consistency in daily data Extended reports under development eg availability and latency of real-time data MAILS Background > Status > Guidelines > Tracking > Monitoring > Summary BACKGROUND > GUIDELINES > NEW STATIONS > MONITORING > SUMMARY

21. EPN Central Bureau IGS Analysis Workshop 2008, Miami Royal Observatory of Belgium Interaction with EUREF Analysis Centers euref.snx, excluded.wwww,… Weekly verification of SINEX files Antenna/radome type + serial number Antenna calibration values – offsets only Station list (missing EPN stations, non-EPN stations) Emails to AC (copy to AAC) ANALYSIS CENTRES Background > Status > Guidelines > Tracking > Monitoring > Summary BACKGROUND > GUIDELINES > NEW STATIONS > MONITORING > SUMMARY

22. EPN Central Bureau IGS Analysis Workshop 2008, Miami Royal Observatory of Belgium EPN guidelines : data flow, real-time, antenna New EPN stations: –Quality over quantity, but exceptions are allowed –If you do not get the info at the time the station is proposed, then you will never get it once it is in the EPN Follow up is crucial Statistics available on-line for station managers and ACs –Usage? –Limited alarms running, but need for more. Automated emails? Background > Status > Guidelines > Tracking > Monitoring > Summary BACKGROUND > GUIDELINES > NEW STATIONS > MONITORING > SUMMARY

23. EPN Central Bureau IGS Analysis Workshop 2008, Miami Royal Observatory of Belgium

24. Background > Management > Guidelines > New Stations > Monitoring > Summary EPN CB

25. EPN Central Bureau IGS Analysis Workshop 2008, Miami Royal Observatory of Belgium Background > Management > Guidelines > New Stations > Monitoring > Summary EPN CB

26. EPN Central Bureau IGS Analysis Workshop 2008, Miami Royal Observatory of Belgium Background > Management > Guidelines > New Stations > Monitoring > Summary EPN CB

27. EPN Central Bureau IGS Analysis Workshop 2008, Miami Royal Observatory of Belgium Background > Management > Guidelines > New Stations > Monitoring > Summary EPN CB