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Activities in 2011

RFWG report ______________________ IGS 39th Governing Board Meeting San Francisco, 3 December 2011. Activities in 2011. Finalization of IGS08/igs08.atx Station selection from ITRF2008 Corrections to account for igs05.atx→igs08.atx calibration changes

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Activities in 2011

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  1. RFWG report______________________IGS 39th GoverningBoard MeetingSan Francisco, 3 December 2011

  2. Activities in 2011 • Finalization of IGS08/igs08.atx • Station selectionfrom 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, 17th • Rotationalinstabilitiesreduced for someACs

  3. Activities in 2011 • ‘igb’ re-combination of repro1+operational AC solutions • Homogeneous set of weekly solutions (1994.0 – 2011.3) • igbproductsused in severalstudies (see AGU talks of Collilieux et al. andRay et al.) • New IGS cumulative solution! • Based on the homogeneousigbdataset • New list of discontinuities • Introduction of velocityconstraints • Otherimprovements: • Check of AC metadata vs. site logs • IGS08 core network used to alignweekly solutions

  4. Activities in 2011 • Monitoring the SINEX combinationresults: RMS of the AC-igsresiduals Switch toIGS08/igs08.atx ESA introducestropo gradients GRG introducestropo gradients JPL: antenna-dependent (or station-dependent?) biases in East

  5. Ongoingactivities • IGS08 maintenance: • « Repair » discontinuities by introducing post-jumpcoordinates • Replace dormant/decommissioned stations by co-located stations • Solve the JPSREGANT problem (with AWG) • A mean calibration isused for twoantennasub-types. • Identifywhichsub-type isinstalledatwhich station • Correct site logs • Also correct IGS08 and IGS cumulative solution • « IGb08 » published in early 2012?

  6. Ongoingactivities • Uncalibrated radome campaign • 3 experimentsso far: CRO1, TSKB and TSK2 • 2 PPP time seriesanalyzed (Bernese & Gipsy) • Difficulties to getaccurateestimates of the radome effects • Strong post-seismic relaxation at TSKB and TSK2 • Seasonal motions • Nextsteps: • Third PPP series (Napeos) • Removeloading model • Furtherexperiments

  7. Ongoingactivities • Enhancement of the IGS network: • 65 SIRGAS stations proposed • 34 advised to ACs • Formalintegrationprocess to bedoneby station operators • Contacts with APREF and AFREF

  8. Ongoingactivities • SINEX combinationwebsite • Maps API • Time seriesvisualizationtools • Webservices • Provisionaladdress: http://webigs.ign.fr/en(login: external; pwd: welcome) • Publiclyavailablearound March 2012

  9. Other plans for 2012 • Repro2: FinalizepreparationwithACs + Combination • Change from 7-d to 1-d sampling • Include satellite PCOs in SINEX combinations • Evaluate the accuracy of the igs08.atx values • DerivePCOs for newlylaunched satellites • GNSS couldcontribute to the scale rate of the next ITRF. • New productsneeded? • Weekly solutions aligned in orientation only to IGS08(more suited for geophysicalstudies) • Invertedgeocenter time series

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

  11. GNSS context 3 December 2011 REGINA presentation - IGS 39th GB Meeting 11

  12. REGINA objectives 3 December 2011 REGINA presentation - IGS 39th GB Meeting 12

  13. REGINA stations 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 3 December 2011 REGINA presentation - IGS 39th GB Meeting 17

  18. Contribution to the IGS 3 December 2011 REGINA presentation - IGS 39th GB Meeting 18

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