armasuisse Swiss Federal Office of Topography swisstopo swisstopo Report for EGVAP 2007/2008 E. Brockmann

2 Swiss Federal Office of Topography swisstopo swisstopo Report 2008 for EGVAP Content GPS -> GPS/GLONASS in Switzerland Activities in E-GVAP Super site selection EUMETNET / EUREF Memorandum of Understanding

3 Swiss Federal Office of Topography swisstopo swisstopo Report 2008 for EGVAP Satellite Constellation 32 GPS-satellites16 GLONASS-satellites Status end of April 2008

4 Swiss Federal Office of Topography swisstopo swisstopo Report 2008 for EGVAP GNSS orbits (from CODE) including “unhealthy” satellites triple launch GLONASS October 2007: only 9 of 17 satellites operational + GPS “29”

5 Swiss Federal Office of Topography swisstopo swisstopo Report 2008 for EGVAP 10 double stations ARDE BOUR DAVO ETHZ FRIC HOHT MART SAAN STAB ZIMM Double stations as compromise between real-time applications (higher availability of the positioning service swipos under difficult environment) and the aspects of reference frame maintenance (continuity of time series)

6 Swiss Federal Office of Topography swisstopo swisstopo Report 2008 for EGVAP Tracking: ZIMM (GPS) – ZIM2 (GNSS) ∅ 10 GPS ∅ 14 GNSS 12 channels max. ZIMM ZIM2

7 Swiss Federal Office of Topography swisstopo swisstopo Report 2008 for EGVAP Activities AGNES-II 2007 March-June: antenna calibration with a robot (company Geo++) 34 individuel antennas + IGS values ( ) Elev.-dependent antenna phase center variations GPS (individuel) + GLONASS (group) [mm] no “outlier antenna”

8 Swiss Federal Office of Topography swisstopo swisstopo Report 2008 for EGVAP Activities AGNES-II 2007(2) Nov. 06 –Sept. 07: GNSS-analyses changes BSW CODE GNSS orbits -Baseline optimization -Preprocessing bugs eliminated for GNSS 14. June (PAYE) – 2. July (GENE): 20 stations upgraded 10.9.:Ambiguity-float GNSS results presented already in Matera Oct. 07: ambiguity resolution for hourly processing Baseline lengthstrategy Fixed Ambiguities kmL1/L % kmL5/L % kmQIF *)70 – 80% *) QIF: only ambiguites with identical frequencies; no amb. GPS - GLONASSDOY 350 (16. December) 2007

9 Swiss Federal Office of Topography swisstopo swisstopo Report 2008 for EGVAP Activities AGNES-II 2007(3) Aug. – today: double station setup (4 sites still missing) 18. Dec.: new site coordinates and new web system (CMS) station Luzern (antenna change: July 11, 2007) 2 mm 25 mm 0 mm

10 Swiss Federal Office of Topography swisstopo swisstopo Report 2008 for EGVAP Activities AGNES-II 2008 LPTR real-time contribution: only GNSS stations : LPT analysis on a new computer (no model changes) Processing start Delivering to EGVAP xx:60’ xx:30’ xx:15’ 3 times faster processing 30 minutes earlier! ~ 80 GNSS sites

11 Swiss Federal Office of Topography swisstopo swisstopo Report 2008 for EGVAP Activities AGNES-II 2008(2) Delivering statistics E-GVAP before April 15 after April 15 ztd “peaks” at xx:00 and x:59

12 Swiss Federal Office of Topography swisstopo swisstopo Report 2008 for EGVAP GNSS validation: ZIM2 Reference: PP, GNSS, absolute antenna PCV GLONASS influence is small for daily PP amb-fix solutions

13 Swiss Federal Office of Topography swisstopo swisstopo Report 2008 for EGVAP Super sites Small coordinate repeatability problems see also EPN web page

14 Swiss Federal Office of Topography swisstopo swisstopo Report 2008 for EGVAP EUMETNET – EUREF - MOU signed in London, June 2007: Data exchange and usage of radiosonde and synop (meteo) for geodetic scientific use Radiosonde data made available on DMI data server since beginning April 2008 “condition of use” form must be signed -> H. Vedel

15 Swiss Federal Office of Topography swisstopo swisstopo Report 2008 for EGVAP EUMETNET Radiosonde Data / swisstopo GNSS data 11 collected radiosonde sites with GNSS sites processed by swisstopo GNSS site RS site

16 Swiss Federal Office of Topography swisstopo swisstopo Report 2008 for EGVAP Comparisons (ZIMM, PAYE)

17 Swiss Federal Office of Topography swisstopo swisstopo Report 2008 for EGVAP EUMETNET Radiosonde Data / GNSS data Paper of first tests at EUREF symposium in Brussels, June 2008: E. Pottiaux, W. Söhne, E. Brockmann In future: met data, eventually NWP (not part of MoU)

18 Swiss Federal Office of Topography swisstopo swisstopo Report 2008 for EGVAP

19 Swiss Federal Office of Topography swisstopo swisstopo Report 2008 for EGVAP GNSS validation: all sites Reference: PP, GNSS, absol. Antenna PCV

20 Swiss Federal Office of Topography swisstopo swisstopo Report 2008 for EGVAP GNSS validation: ETH2 Reference: PP, GNSS, absol. Antenna PCV

21 Swiss Federal Office of Topography swisstopo swisstopo Report 2008 for EGVAP GPS Automatisches Netz Schweiz GNSSG S

22 Swiss Federal Office of Topography swisstopo swisstopo Report 2008 for EGVAP Other collocated sites

23 Swiss Federal Office of Topography swisstopo swisstopo Report 2008 for EGVAP Ground track GPS / GLONASS 1 day

24 Swiss Federal Office of Topography swisstopo swisstopo Report 2008 for EGVAP Ground track GPS / GLONASS 2 days

25 Swiss Federal Office of Topography swisstopo swisstopo Report 2008 for EGVAP Daily repeatabilities GLONASS repetability station ETH2 1 cm 2 cm

26 Swiss Federal Office of Topography swisstopo swisstopo Report 2008 for EGVAP Daily repeatabilities GPS repetability station ETH2 1 cm 2 cm

27 Swiss Federal Office of Topography swisstopo swisstopo Report 2008 for EGVAP Daily repeatabilities GPS+GLONASS (NEQ) repetability station ETH2 1 cm 2 cm

28 Swiss Federal Office of Topography swisstopo swisstopo Report 2008 for EGVAP Super Sites (cont) BRST: the hourly data latency has recently improved, but is was not optimal in the past. MEDI: degraded coordinate repeatability in the east/height component since the beginning of eries/rawtimeseries.php?station=MEDI_12711M003 eries/rawtimeseries.php?station=MEDI_12711M003 MILO: rather noisy height component (compared to really good stations, but the situation is not dramatic) eries/rawtimeseries.php?station=MILO_12758M001 eries/rawtimeseries.php?station=MILO_12758M001

29 Swiss Federal Office of Topography swisstopo swisstopo Report 2008 for EGVAP

30 Swiss Federal Office of Topography swisstopo swisstopo Report 2008 for EGVAP

31 Swiss Federal Office of Topography swisstopo swisstopo Report 2008 for EGVAP