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E3 Network Results IVS General Meeting January 11, 2006

E3 Network Results IVS General Meeting January 11, 2006. Background. E3 Network was designed to provide an additional day to VLBI EOP determination Uses the S2 recorder and Data Acquisition System (2 Frequency-Agile Baseband Converters) Operates at 128 Mbps, 18 Channels (10 X, 8 S)

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E3 Network Results IVS General Meeting January 11, 2006

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  1. E3 Network ResultsIVS General MeetingJanuary 11, 2006

  2. Background • E3 Network was designed to provide an additional day to VLBI EOP determination • Uses the S2 recorder and Data Acquisition System (2 Frequency-Agile Baseband Converters) • Operates at 128 Mbps, 18 Channels (10 X, 8 S) • Offers an independent check for systematic differences • 45 Sessions since March, 2002

  3. E3 Network

  4. Scheduling • Complicated by Small dishes • Continuous Tape motion • Typical Session has ~1300 scheduled obs, 400-700 used in analysis • Correlation at 6 station Correlator at Dominion Radio Astronomical Observatory (DRAO)

  5. E3 Contribution to TRF • Adds unique point at CTVASTJ • Bulk of Yellowknife observations • CTVASTJ Position (2004 epoch) determined to: Up: 9 mm, 0.5 mm/yr East: 1 mm, 0.9 mm/yr North: 1 mm, 1.0 mm/yr

  6. Station repeatability

  7. Baseline Repeatability

  8. EOP Comparisons • Comparisons of E3 EOP results against IVS R series are made after all sessions • CALC/SOLVE solution with C04 Series removed • Best E3 sessions compare very well, sessions with station problem indicate network is not robust

  9. Poles

  10. UT

  11. Nutation

  12. EOP Summary

  13. GPS Clock Comparison • Add IGS Final Clock solution for ALGO and KOKEE to E3 delay in E3011 (not IVS database product) • Solved using only Clock offset, or using tight clock constraints

  14. GPS Clock Used in VLBI Solution

  15. Future (VLBI2010) • CTVA victim to XM RFI – Upgrade or Move • PC based replacement for the S2 recorder • Software Correlator License from NICT • Unattended operations at CTVA/Yellowknife

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