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AMS Breakfast Meeting FORMOSAT-3/COSMIC Mission 15 January 2007

AMS Breakfast Meeting FORMOSAT-3/COSMIC Mission 15 January 2007. 14 April 2006 Vandenberg AFB. Welcome to a new era of Earth observations!. FORMOSAT-3/COSMIC launch picture provided by Orbital Sciences Corporation. Global Coverage - 2500 Daily Soundings by early 2007 - all weather!.

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AMS Breakfast Meeting FORMOSAT-3/COSMIC Mission 15 January 2007

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  1. AMS Breakfast Meeting FORMOSAT-3/COSMIC Mission 15 January 2007 14 April 2006 Vandenberg AFB Welcome to a new era of Earth observations! FORMOSAT-3/COSMIC launch picture provided by Orbital Sciences Corporation

  2. Global Coverage - 2500 Daily Soundings by early 2007 - all weather! • Red - Daily average Radiosondes • Green - Daily FORMOSAT-3/COSMIC Soundings

  3. Free access to data Free and Open Data Access • Data user registration website: • http://tacc.cwb.gov.tw/en/service/policy.htm • or via • http://www.cosmic.ucar.edu • http://tacc.cwb.gov.tw/en/index.htm • * Select the 'Sign Up ' link under • COSMIC • Accept data use agreement • * Enter information: • Name, Address, email, user_id, • Password, planned use of data • An email will be sent within 2-3 • business days to indicate • access has been granted. ~400 users have already registered

  4. Early Results-Weather • Global coverage in all weather-sees through clouds! • Accurate vertical profiles of water vapor • Observing the atmospheric boundary layer • Improvement of weather forecast models • Hurricanes and Typhoons • Antarctica • Improved accuracy of global weather models

  5. Vertical moisture profiles Vertical profiles of water vapor pressure from two COSMIC satellites on 8 July 2006 are shown (in gray and red). The location is 21S, 71W. The corresponding moisture profile from National Centers for Environmental Prediction (NCEP-NOAA) analysis is shown in green dots-line.

  6. First atmospheric boundary layer measurements from space. Sharp boundary (ABL top) at ~ 2 km altitude

  7. Assimilate this sounding only Low-level moisture change by assimilating GPS GPS all GPS 1 Fig. 8a

  8. 2006-08-27-12Z (102h forecast) Sat. IR No GPS GPS all GPS 1 Fig. 8b

  9. Southern Hemisphere Forecast Improvements Sean Healey, ECMWF

  10. Early impact experiments (T382) with COSMIC • Anomaly correlation as a function of forecast day for two different experiments: - E (assimilation of operational obs), - BND (E + COSMIC bending angle). • Only COSMIC observations available in operations have been used in BND. • Only COSMIC observations < 30 km • These results might have been impacted by the development stage of the GSI system Lidia Cucurull, JCSDA/UCAR

  11. December 2006 data latency -profile arrival at UKMO (FM1 70% < 3h)

  12. Blue = sea ice; Green = open water Diagnosis of errors in regional model forecasts over AntarcticaLow-level error statistics show influence of sea-ice representation

  13. Data Quality Climate Space Weather

  14. Deviation of pairs of RO soundings separated by less than 10 km

  15. Precision of GPS RO soundings PPUTLS = Precision Parameter of Upper Troposphere and Lower Stratosphere, which is the mean absolute differences in the 10-20 km layer 0.02% difference in refractivity, which is equivalent of 0.05 C in temperature Fig. 5b

  16. Fig. 12b One Month (Sep. 06) COSMIC-CHAMP Comparison: 76 pairs, within 2 degree & 90 min

  17. Radio Occultation Temperature Record Data from three Missions

  18. Can we use GPS RO data to calibrate other instrument ? a b c N15, N16 and N18 AMSU calibration against COSMIC

  19. First collocated ionospheric profiles

  20. Count of Ionospheric Profiles

  21. From presentation by Ludger Scherliess, Utah State University Comparisons during quiet and disturbed Conditions COSMIC #2 GAIM Quiet COSMIC #2 GAIM Storm Fig. 13a

  22. Comparison of NmF2 and HmF2 between COSMIC and GAIM during Apr. 21-28, 2006 From presentation by Zhen Zeng, NCAR/HAO Good agreement of NmF2 between COSMIC and GAIM; Higher peak heights from GAIM than those from COSMIC Fig. 13b

  23. Formosat-3/COSMIC Observations of Scintillations From presentation by Chin S. Lin, AFRL RED = COSMIC sat BLUE = GPS sat Fig. 16

  24. TIP 135.6-nm passes 14 Sep 2006 FM1 FM3 FM6 0-24 UT (2100 LT) From presentation by Clayton Coker, NRL Fig. 17

  25. Summary • FORMOSAT-3/COSMIC a successful Taiwan-U.S. project • FORMOSAT-3/COSMIC launched nearly on time and within budget (~$100M mission) • Cost-effective way of obtaining global atmospheric soundings in all weather • High accuracy, precision and vertical resolution demonstrated • Already positive impact on weather models + hurricane forecasting • Observations of tropical boundary layer from space for first time • Only observing system to provide information on ionosphere, stratosphere and troposphere • Expected to have major impact on climate monitoring-world’s most accurate, precise and stable thermometer! • Free and open exchange of data— ~400 users already

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