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Validation and extension of ITRF2005 for DORIS POD

Validation and extension of ITRF2005 for DORIS POD. P. Willis (IGN/IPGP), J.C. Ries (U Texas), F. Lemoine (GSFC), L. Soudarin (CLS), E. Pavlis (GSFC), N. Zelensky (SGT). SUMMARY. Goals Inputs / Outputs Example of problems (future) validation and plans Conclusion. GOALS.

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Validation and extension of ITRF2005 for DORIS POD

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  1. Validation and extension of ITRF2005for DORIS POD P. Willis (IGN/IPGP), J.C. Ries (U Texas), F. Lemoine (GSFC), L. Soudarin (CLS), E. Pavlis (GSFC), N. Zelensky (SGT)

  2. SUMMARY • Goals • Inputs / Outputs • Example of problems • (future) validation and plans • Conclusion

  3. GOALS • Control recent ITRF2005 for POD • Extend it for missing stations (new sites) • Provide metadata to POD group related to station coordinates and velocities

  4. INPUTS(DORIS station coordinates) • ITRF2005 X + V • DORISMails (IGN/SIMB = H. Fagard) • Collocation in ITRF2005 + local tie • DORIS cumulative solution (X + V) • DORIS using fixed velocity (X)

  5. OUTPUTS • Station coordinates X(epoch 2000.0) • Station velocity V • DORIS Data to delete (periods) • Station discontinuities (break/epoch/cause)

  6. DORIS stations not in original ITRF2005 • MALB RIKB • MIAB BETB • SCRB HEMB (no data) • MONB • DIOB • DJIB • ARFB

  7. Example of problems Arequipa : ARFB (velocity after the Earthquake is different) DJIB (antenna instability)

  8. (Future) validation and plans • Do POD tests using: • original ITRF2005 • Extended DPOD2005 • Individual DORIS AC cumulative • Plans for the future • April: Finalize DPOD2005 • May-June: POD validation

  9. CONCLUSIONS • No major problem found in DORIS ITRF2005 solution • Preliminary DPOD2005 frame • Validation in May-June 2007

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