1. RFWG report ______________________ IGS 39th Governing Board Meeting San Francisco, 3 December 2011 1

2. Activities in 2011 Finalization of IGS08/igs08.atx Station selection from ITRF2008 Corrections to account for igs05.atx→igs08.atx calibration changes Determination of new satellite z-PCOs Definition of the IGS08 core network Documentation / help IGS Mails 6354, 6355, 6356 Rebischung et al., IGS08: Elaboration, consequences and maintenance of the IGS realization of ITRF2008, EGU 2011 Rebischung et al., IGS08: the IGS realization of ITRF2008, GPS Solutions, in press Transition on April, 17 th Rotational instabilities reduced for some ACs 2

3. Activities in 2011 ‘igb’ re-combination of repro1+operational AC solutions Homogeneous set of weekly solutions (1994.0 – 2011.3) igb products used in several studies (see AGU talks of Collilieux et al. and Ray et al.) New IGS cumulative solution! Based on the homogeneous igb dataset New list of discontinuities Introduction of velocity constraints Other improvements: Check of AC metadata vs. site logs IGS08 core network used to align weekly solutions 3

4. Activities in 2011 Monitoring the SINEX combination results: 4 RMS of the AC-igs residuals Switch to IGS08/igs08.atx ESA introduces tropo gradients GRG introduces tropo gradients JPL: antenna-dependent (or station-dependent?) biases in East

5. Ongoing activities IGS08 maintenance: « Repair » discontinuities by introducing post-jump coordinates Replace dormant/decommissioned stations by co-located stations Solve the JPSREGANT problem (with AWG) A mean calibration is used for two antenna sub-types. Identify which sub-type is installed at which station Correct site logs Also correct IGS08 and IGS cumulative solution « IGb08 » published in early 2012? 5

6. Ongoing activities Uncalibrated radome campaign 3 experiments so far: CRO1, TSKB and TSK2 2 PPP time series analyzed (Bernese & Gipsy) Difficulties to get accurate estimates of the radome effects Strong post-seismic relaxation at TSKB and TSK2 Seasonal motions Next steps: Third PPP series (Napeos) Remove loading model Further experiments 6

7. Ongoing activities Enhancement of the IGS network: 65 SIRGAS stations proposed 34 advised to ACs Formal integration process to be done by station operators Contacts with APREF and AFREF 7

8. Ongoing activities SINEX combination website Maps API Time series visualization tools Webservices Provisional address: http://webigs.ign.fr/en (login: external; pwd: welcome)http://webigs.ign.fr/en Publicly available around March 2012 8

9. Other plans for 2012 Repro2: Finalize preparation with ACs + Combination Change from 7-d to 1-d sampling Include satellite PCOs in SINEX combinations Evaluate the accuracy of the igs08.atx values Derive PCOs for newly launched satellites GNSS could contribute to the scale rate of the next ITRF. New products needed? Weekly solutions aligned in orientation only to IGS08 (more suited for geophysical studies) Inverted geocenter time series 9

10. REGINA project 3 December 2011 REGINA presentation - IGS 39th GB Meeting 10 « Réseau Gnss pour l’IGS et la Navigation » GNSS network for IGS and Navigation

11. GNSS context New GPS signals (L2C, L5) GLONASS now operational and being improved Improvements of existing systems Galileo: 2 satellites launched Asian systems: COMPASS, QZSS New systems Precise Point Positioning Real-time 3 December 2011 REGINA presentation - IGS 39th GB Meeting 11

12. REGINA objectives Upgrade CNES and IGN existing stations Install new stations → global worldwide network of 30 stations Real-time diffusion of multi-GNSS data (especially Galileo) Global multi-GNSS real-time network Real-time determination and diffusion of orbits and clocks Positioning IGS EUREF ITRF (co-locations with DORIS; local ties) Contributions to 3 December 2011 REGINA presentation - IGS 39th GB Meeting 12

13. REGINA stations Stable mount (ground or building) Distance from DORIS antenna: 5 m to 1 km (<100 m preferred) No masks above 15° Existing shelter for receiver housing, or possibility to build one At least 1 km away from powerful microwave sources Long-term secured location (no planned constructions, demolitions…) Antenna site Restricted access Standard 110 or 220 VAC power supply Internet line tap Sheath inlet for REGINA antenna cable Receiver housing GPS L1/L2/L2C/L5 GLONASS L1/L2 GIOVE-GALILEO E5a/E5b/AltBocE5, E1BC SBAS L1/L5 Waiting for E6 commercial receivers Signals tracked 3 December 2011 REGINA presentation - IGS 39th GB Meeting 13

14. REGINA network Preliminary coverage design 3 December 2011 REGINA presentation - IGS 39th GB Meeting 14

15. REGINA network Existing, upgraded stations 3 December 2011 REGINA presentation - IGS 39th GB Meeting 15

16. REGINA network Current IGS reference frame stations 3 December 2011 REGINA presentation - IGS 39th GB Meeting 16

17. REGINA data centers Primary data center at CNES (Toulouse) Redundant data center at IGN (Saint-Mandé) Locations NTRIP streams Broadcast to registered users via CNES caster 1. Real-time data flow Acquisition of consolidated 15min data files Conversion to RINEX2&3 (15min/1s, 1h/1s, 1h/30s, 24h/30s) Diffusion to IGS/EUREF data centers 2. RINEX files Remote monitoring Alert messages Maintenance and administration of station and transmission network Configuration test 3. Remote configuration and control of receivers 3 December 2011 REGINA presentation - IGS 39th GB Meeting 17

18. IGS guidelines included in the REGINA station requirements Enhancement of the IGS real-time network coverage Upgrade/duplication of existing IGS (RF) stations All REGINA stations proposed for integration into the IGS network CNES/IGN common proposal through REGINA Participation to the IGS M-GEX campaign Project life: 30 years Station life: Agreements with host organizations allow perennial installations. Lifetime Contribution to the IGS 3 December 2011 REGINA presentation - IGS 39th GB Meeting 18