N E S D I S C D A A C. COSMIC Operations JCSDA TACC NCEP ECMWF CWB GTS UKMO
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1 CDAAC Activities Bill Schreiner B. Kuo, C. Rocken, S. Sokolovskiy, D. Hunt, X. Yue, J. Zeng, K. Hudnut, M. Sleziak, T.-K. Wee, T. Vanhove, J. Lin UCAR / COSMIC Program Office - Boulder CO COSMIC IWG Meeting Jan 24, 2011
2 RTSs: Alaska Norway McMurdo Wallops Ny-alesund Cordoba AF/Hanscom Input Data - COSMIC data - Attitude data - GPS ground data - GPS NDM Bits - GFS Forecast - IGS/IGU ORB/CLK - Bernese Config files TACC C D A A C Science & Archive COSMIC Operations UCAR/Unidata s LDM Research WGET Community WMO BUFR Files per day with Latency ~ 75-90min SFTP AFWA N E S D I S GTS JCSDA Meteo France Data products disseminated within min average NCEP ECMWF CWB UKMO JMA Canada Met.
3 Successful COSMIC Profiles 4/21/06-1/20/11 Neutral Atmosphere ~ 2.60M Ionosphere EDPs ~ 2.67M
4 Getting COSMIC Results to Weather Centers COSMIC L1/L2 Signal-to-Noise Ratios
5 GPS RO Firmware Update Status Firmware version tested on FM1 from Oct 1-9, L2C tracking - ½ cycle slip problem fixed - SNRs lower than expected by ½ - No L2C rising occultations - Collected 50 Hz L1 C/A amplitude data on reference satellites - Tested RFI snooper (diagnostic SNR information) - Tracked deep signals ~ -350 km HSL JPL is investigating L2C problems with Store GPS ephemeris for improved rising occultations after reboot
6 New Missions of Opportunity SAC-C (Satélite de Aplicaciones Cientificas C) - Argentinian CONAE polar mission launched Nov Near real-time data provided by Germany s GFZ and CONAE - CDAAC providing occultations per day to NOAA C/NOFS Occultation Receiver for Ionospheric Sensing and Specification (CORISS) - USAF low latitude mission launched Apr 16, CDAAC providing tropical occultations per day (~ 3 COSMIC FMs) to NOAA Metop/GRAS (GNSS Receiver for Atmospheric Sounding) Receiver - UCAR-EUMETSAT BA differences have negligible bias - CDAAC has initiated CL/OL post-processing of Metop/GRAS data - CDAAC could process near real-time data that is provided by NOAA
7 Near Real-time Comparison for SAC-C, COSMIC, C/NOFS SAC-C COSMIC Global C/NOFS COSMIC 20<Lat<30 8km cutoff
8 Support to the Community 1488 data users from 58 countries CDAAC 3.0 providing NRT, Post- Processed, and climate Reanalysis products Providing NRT data to NWPs Providing NRT data to AFWA NRT data to 79 university users via Unidata s LDM Recently added CDACC FTP server (162 TB downloaded) Providing data, software and processing support for RO-Trends comparisons Host data processing and climate WS (Aug 2011) Data Downloaded ~162TB (1/3 from university community)
9 CDAAC System CDAAC Near Term Plans - Enhancements to support Firmware modifications - GNSS capability and new observables - Re-structure science data processing - Add new data products (daily netcdf files, climatologies,..) Neutral Atmospheric Products - Continue to investigate structural uncertainty in LT - Explore new methods of BA optimization in upper stratosphere - Investigate ionospheric corrections and use of L2C Ionospheric Products - Improve DCBs and absolute TEC - Improve EDPs with DA methods - scintillation improvements (provide 10-sec average S4) Support Upcoming Missions of Opportunity (KOMPSAT-5, PAZ,..)
10 Acknowledgments NSF Taiwan s NSPO NASA/JPL, NOAA, USAF, ONR, NRL Broad Reach Engineering
11 Recent RO Research and Science Apps Investigated structural uncertainty of RO in LT. Published in JGR Comparing different methods of estimation of the ABL depth from RO. Investigating global variability. Publishing results soon. Detection of the sporadic E clouds from RO. Published in GRL Investigation of the response of the UTLS in terms of gravity waves and tidal variations from COSMIC data to the sudden stratospheric warming event in 2009 COSMIC EDPs used to estimate ionosphere High Transition Heights (HTH). Published in JASTP Investigated global ionospheric response observed by COSMIC Satellites during the January 2009 Stratospheric Sudden Warming Event. Published in JGR-SP Publication on data assimilation method to improve EDPs
12 Recent RO Research and Science Apps Global Evaluation of Radiosonde Water Vapor with RO data, Published in J of Remote Sensing Evaluation of AMSU and AIRS with RO Impacts of GPS radio occultation data assimilation on regional weather predictions. Published in GPS Solutions Working on Round-2 of RO-Trends inter-agency comparison UCAR funded by EUMETSAT to evaluate Metop/GRAS closed loop RO data. Final report submitted. Evaluated open-loop GRAS data
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