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Using GPS Radio Occultation Data Operationally at NOAA: Plans and Issues

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Office of Research and Applications (ORA) Climate Research and ... GPS/MET, OERSTED, SAC-C, CHAMP (next s) Depth of RO Soundings Achieved by CHAMP ... – PowerPoint PPT presentation

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Title: Using GPS Radio Occultation Data Operationally at NOAA: Plans and Issues


1
Using GPS Radio Occultation Data Operationally at
NOAA Plans and Issues
  • James G. Yoe
  • NOAA/NESDIS
  • Office of Research and Applications (ORA)
  • Climate Research and Applications Division (CRAD)
  • james.g.yoe_at_noaa.gov
  • M.K. Rama Varma Raja
  • Information Management Systems Group (IMSG)

2
Overview
  • Activities Past Present
  • Anticipated GPS/RO Applications
  • Operational Issues Foreseen
  • Plans for Addressing Issues
  • Summary

3
NOAA Participants
  • NESDIS/ORA and Office of Systems Development
  • J. Yoe, Rama Varma Raja, J. Silva, and D.
    McGinnis,
  • NESDIS/CIMSS
  • Eva Borbas and Paul Menzel
  • Integrated Program Office for NPOESS
  • Stephen Mango
  • National Centers for Environmental Prediction -
    NCEP
  • Stephen Lord, John Derber, D. Keyser, and Mel
    Gelman
  • Joint Center for Satellite Data Assimilation -
    JCSDA
  • NCEP plus NASAs J. Joiner and P. Poli

4
Early NOAA GPS/RO
  • Initial NIH (Not Invented Here) reaction, but
  • Interest in complementary sounding grew
  • All weather, Vertical Resolution, Accuracy
  • Possibilities for climate application
  • Lack of conventional upper level soundings
  • Potential for Numerical Weather Prediction
  • Vertical coverage, number, computational cost
    (Matsumura, et al, 1999)

5
Recent/Current Emphasis
  • Workshop, Washington DC May 2000
  • Support development of operational missions
  • NPOESS/GPSOS and METOP/GRAS
  • Requirements, reviews/TIMS, OAT and IFCT
  • Support for external missions
  • COSMIC (CDAAC development support)
  • Product development
  • Borbas et al, 2003 Combined T and e soundings
  • Prototype mission assessment on-going
  • GPS/MET, OERSTED, SAC-C, CHAMP (next slides)

6
Compare to GPS/MET with median cut-off height
500 mb. Improved HW, firmware, and software have
extended vertical coverage for RO. Note that Kuo
et al (2003) still find enhanced refractivity
bias (against model predictions) below 5 km.
Depth of RO Soundings Achieved by CHAMP
7
(No Transcript)
8
Operational Applications
  • Climate Monitoring, Analysis, Prediction
  • NWS/NCEP/CPC and NESDIS/STAR SCMD
  • Explore upper stratospheric temperature trends
  • Investigate refractivity as a climate data record
  • Satellite Data Calibration and Validation
  • NESDIS/ORA/CRAD
  • Intercomparisons of GPS/RO and radiometric
    soundings
  • Numerical Weather Prediction
  • NWS/NCEP/EMC and JCSDA
  • Assimilation and Impact assessment

9
Operational Issues
  • CRITICAL issues are TEMPORAL
  • Affected Application is NWP
  • Receiving and formatting (BUFR) of data in time
    for model cycle inclusion
  • Cost in computational time
  • First operational missions are imminent
  • GRAS - 2005
  • COSMIC - 2005

10
Actions Planned (I)
  • GPS/RO team formed at JCSDA
  • NASA/DAO, NCEP, NESDIS
  • POCS Joiner, Derber, Yoe
  • Collaboration with UCAR and the NSF
  • Three Young Scientists to be hired
  • RO Modeling (Dr. Lidia Cucurull 04/01/03)
  • RO/advanced sounder specialist at JCSDA
  • Advanced sounder/RO specialist at UCAR
  • All to interact closely
  • End-to-end GPS/RO data assimilation, error
    characterization, impact assessment

11
Actions (II)
  • GPS/RO Workshop Planned
  • Washington, DC Area
  • October 28 30, 2003 (to be confirmed)
  • Point of Contact james.g.yoe_at_noaa.gov
  • General Announcement by e-mail this month
  • WebPage will be set-up to keep info current
  • Purpose is to advance, accelerate, and optimize
    operational usage of GPS/RO for NWP

12
WS Goals
  • Science
  • Emphasize robustness/stability, documentation
  • Avoid academic diversions
  • Engineering
  • Emphasize efficiency and stability of IT,
    communications, data handling
  • Welcome GRAS, European participation
  • At workshop and beyond

13
Summary
  • Considerable scientific, technical, and
    programmatic progress has been made world-wide
    with GPS/RO
  • Varied products/applications anticipated
  • Bending angles, N (NWP)
  • T, N (Climate)
  • Moisture products (Inter-satellite cal/val)
  • Critical issue now is preparation for effective
    use
  • Especially for NWP
  • Efficient collaboration exchange
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