COSMIC Data Analysis and Archive Center (CDAAC)UPDATE

Bill SchreinerB. Kuo, C. Rocken, S. Sokolovskiy, D. Hunt, X. Yue, Z. Zeng,

K. Hudnut, M. Sleziak-Sallee, T. VanHove, J. Lin

UCAR/COSMIC Program Office

Outline

• COSMIC Program Office Status• COSMIC System Status• CDAAC Status• GPS Firmware Update Plans • Science Highlights• Near Term Plans

COSMIC Program Office Status

• Submitted COSMIC Continued Operations Proposal to NSF for years 2011-2014

• Preparing submission of COSMIC Follow-On Planning Proposal to NOAA

• Bill Schreiner promoted to CDAAC Manager• Ingrid Moore is full-time Administrator• Kim Prinzi-Kimbro resigned as Administrative Assistant• Dawn Williams hired as new Administrative Assistant• Hired Ionospheric Scientist: Dr. Xinan Yue• Hired Inversion Scientist: Dr. Zhen (Janet) Zeng• Hired Software Engineer: Jason Lin• Plan to hire Barbara Pirscher (Uni. Of Austria) as Post-Doc for

climate studies

CDAAC

NESDIS

GTS

NCEP

ECMWF

CWB

UKMO

Canada Met.

JMA

1500-2000 WMOBUFR Files per day withLatency ~ 75-90min

Getting COSMIC Results to Weather Centers

JCSDA

MeteoFrance

COSMIC Operational Processing

Science & Archive

TACC

AFWA

Input Data- COSMIC data- GPS ground data- GPS NDM Bits- GFS Forecast- IGS/IGU ORB/CLK- Bernese Config files

ResearchCommunity

SFTP

UCAR/Unidata’sLDM

WGET

RTSs:AlaskaNorwayAntarctica/McMurdo

Providing data to 1,198 registered users from 54 countries

COSMIC Occultation Count

> 2.1 Million Profiles in Real TimeLaunch to present

Data Processing Status

• Implemented/evaluated L2C processing of first COSMIC data• Investigated/modified truncation of deep RO signals• Investigated/improved filtering methods

- Removed stratospheric bias (~0.2%) > 20 km- Removed lower troposphere bias (~0.5%) < 6 km

• Disseminating New Version of Data Products- Worked with weather centers to update BUFR files- Real-time: since Oct 12, 2009- Post-Processing (version 2009.2650): since Apr 2009

Improvements to CDAAC Inversion Software: < 6km

1 July 2007OLD Inversion Software(With sliding median filter)

NEW Inversion Software(Without sliding median filter)

COSMIC - ECMWF COSMIC - ECMWF

• With COSMIC Open Loop Tracking and CDAAC RH inversion software- ~ 85% penetrate to 1 km of surface at high latitudes.- ~ 65% penetrate to 1 km of surface at low latitudes. - Negative N bias?

COSMIC Data Loss

• COSMIC spacecraft (power and attitude anomalies)

• GPS Payloads functioning with some degradation (infrequent low Signal-to-Noise ratio)

• RTS reliability > 95%• ~ 20% missed dumps to due

Spacecraft/Payload/RTS problems• CDAAC Quality Control: ~35% marked bad

- ~25% due to poor L2P (semi-codeless) signal quality

• CDAAC Reliability: > 99.5%

GPS RO Firmware Update Plans

• Test new JPL implementation of L2P tracking• Improve L2C tracking• Detect low SNR condition and download diagnostic

information• Modify firmware to track deep signals < -300 km

HSL

Excluding deep RO signals from inversions

Science Highlights - 2009 COSMIC Workshophttp://www.cosmic.ucar.edu/oct2009workshop/index.html

• Weather– Cucurull at NCEP showed 8 hours of improvement in Weather forecast skill at day 4 and over 15 hours in day 7

– Von Engeln, At ECMWF, RO data #5 in analysis of 1-day forecast error reduction at ECMWF– Randel showed evidence of ubiquitous tropopause inversion layer – upper level tropospheric moisture in polar

regions– Taylor used RO to evaluate polar SSW event – questions remain about reaction of tropical tropopause– Seidel showed that PBL difficult to define– Fei Xie (and Jie) presented results on diurnal variability of PBL – Kursinski used to RO to look into ENSO monitoring/prediction– Gravity wave studies and estimates of propagation direction– Sergey discussed structural uncertainty in LT– Metop/GRAS has tracking problems in LT

• Climate and Validation– Ho demonstrated mission independence and calibration potential (other instruments) of RO data– Pirscher evaluated bending angle noise results from different missions, CHAMP – Steiner et al, presented climate trends with CDAAC RO that were consistent with Radiosondes, climate models– Marquardt showed that Metop/GRAS has lower noise than COSMIC at high altitudes– Climatologies of tropopause, PBL– Randel showed evidence of ubiquitous tropopause inversion layer – upper level tropospheric moisture in polar

regions– Kursinski used to RO to look into ENSO monitoring/prediction

Cont.• Ionosphere and Space Weather

– CDAAC presented possible ionospheric response to SSW event– Yue presented Abel inversion errors in ionosphere– Alan Burns from HAO/NCAR reported that the WSA phenomena can happens in a vast area near

dusk in summer using COSMIC NmF2 and hmF2 and can be explained by the conjugate effects– Charles Lin from NCKU reported mid-latitude summer nighttime anomaly (MSNA) of the

ionosphere by COSMIC EDPs– Tiger Liu reported the plasma depletion bay by COSMIC EDPs– Scintillation studies by Strauss, Gouthu– Sporadic E layer climatology with COSMIC– Nicholas Pedatella from CU used COSMIC EDPs and TIP data to study the ionosphere disturbance

during 15 Dec 2006 geomagnetic storm and found a long lasting positive storm effect in ionosphere

– Clayton Coker from NRL assimilated TIP observations into USU GAIM and found obvious improvement of assimilation results during nighttime then only assimilating GPS observations

– Xiaoqing Pi from JPL did many observation system simulation experiments (OSSE) and found that COSMIC 2 can advance the assimilation performance because of much more GPS TEC observations than current COSMIC

Diurnal variations of the ABL depthover the Ocean

South AtlanticSouth Pacific (I)

(thin lines – standard deviations of the mean)

Ionospheric High Transition Height (HTH)

Comparison between COSMIC and C/NOFS observations of HTH|lat| < 13, June-August, 2008

COSMIC C/NOFS

Heelis et al. 2009GL038652

Yue et al. 2009Presented at AGU

Near Term Plans – CDAAC Enhancements

• Release CDAAC 3.0 System– Improve data access (FTP site, ..), update website, DB interface– Add new data products (daily netCDF files, 10-sec average S4, climatologies)– Modifications to support Firmware modifications

• Neutral Atmospheric Products– Continue to investigate structural uncertainty in LT– Explore new methods of BA optimization– Investigate ionospheric corrections and use of L2C– New implementation of 1DVAR (use GFS high-resolution model as first guess

in real-time. First guess in post-processing TBD)• Ionospheric Products

– Improve EDPs by using information on horizontal gradients– Improve Quality Control

COSMIC-II Planning Update

• Assisting NOAA in GNSS RO Follow-On Mission Planning– Supporting program meetings– Assisting in preparation of Level 1 Requirements Document

• Preparing submission of COSMIC Follow-On Planning Proposal to NOAA (for period Mar 2010 – Sept 2011)– Provide continued technical and scientific support for program requirements

documents– Support for Design Review meetings– Develop necessary planning documents and memoranda of understandings, including

appropriate AIT-TECRO agreements – TAA Support for

• development and processing of TAA and TTCP• document review, logging and transfer• monitoring meetings and teleconferences

Acknowledgments

• NSF• Taiwan’s NSPO• NASA/JPL, NOAA, USAF, ONR, NRL• Broad Reach Engineering