COSMIC Data Analysis and Archive Center (CDAAC) Ac8vi8es, Ionospheric Research

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1 COSMIC Data Analysis and Archive Center (CDAAC) Ac8vi8es, Ionospheric Research Bill Schreiner B. Kuo, C. Rocken, S. Sokolovskiy, D. Hunt, X. Yue, Z. Zeng, K. Hudnut, M. Sleziak Sallee, T. VanHove UCAR/COSMIC Program Office

2 Outline COSMIC System Status CDAAC Status GPS Firmware Update Plans Science Highlights Near Term Plans

3 Getting COSMIC Results to Weather Centers COSMIC Opera8onal Processing TACC JCSDA NCEP RTSs: Alaska Norway Antarctica/McMurdo Input Data - COSMIC data - GPS ground data - GPS NDM Bits - GFS Forecast - IGS/IGU ORB/CLK - Bernese Config files C D A A C Science & Archive 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 Meteo France ECMWF CWB UKMO JMA Canada Met. Providing data to 1,198 registered users from 54 countries

4 COSMIC Occulta8on Count > 2.1 Million Profiles in Real Time Launch to present

5 Data Processing Status Implemented/evaluated L2C processing of first COSMIC data Inves8gated/modified trunca8on of deep RO signals Inves8gated/improved filtering methods - Removed stratospheric bias (~0.2%) > 20 km - Removed lower troposphere bias (~0.5%) < 6 km Dissemina8ng New Version of Data Products - Worked with weather centers to update BUFR files - Real 8me: since Oct 12, Post Processing (version ): since Apr 2009

6 Improvements to CDAAC Inversion So^ware: < 6km OLD Inversion Software (With sliding median filter) COSMIC - ECMWF 1 July 2007 NEW Inversion Software (Without sliding median filter) 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?

7 COSMIC Data Loss COSMIC spacecra^ (power and aatude anomalies) GPS Payloads func8oning with some degrada8on (infrequent low Signal to Noise ra8o) RTS reliability > 95% ~ 20% missed dumps to due Spacecra^/ Payload/RTS problems CDAAC Quality Control: ~35% marked bad - ~25% due to poor L2P (semi codeless) signal quality CDAAC Reliability: > 99.5%

8 GPS RO Firmware Update Plans Test new JPL implementa8on of L2P tracking Improve L2C tracking Detect low SNR condi8on and download diagnos8c informa8on Modify firmware to track deep signals < 300 km HSL

9 Excluding deep RO signals from inversions

10 Science Highlights 2009 COSMIC Workshop hjp:// 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 reduc>on 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 ques>ons remain about reac>on 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/predic>on Gravity wave studies and es>mates of propaga>on direc>on Sergey discussed structural uncertainty in LT Metop/GRAS has tracking problems in LT Climate and Valida>on Ho demonstrated mission independence and calibra>on poten>al (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 al>tudes 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/predic>on

11 Ionosphere and Space Weather Cont. 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 la>tude summer nighfme anomaly (MSNA) of the ionosphere by COSMIC EDPs Tiger Liu reported the plasma deple>on bay by COSMIC EDPs Scin>lla>on 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 geomagne>c storm and found a long las>ng posi>ve storm effect in ionosphere Clayton Coker from NRL assimilated TIP observa>ons into USU GAIM and found obvious improvement of assimila>on results during nighfme then only assimila>ng GPS observa>ons Xiaoqing Pi from JPL did many observa>on system simula>on experiments (OSSE) and found that COSMIC 2 can advance the assimila>on performance because of much more GPS TEC observa>ons than current COSMIC

12 Diurnal variations of the ABL depth over the Ocean South Pacific (I) South Atlantic (thin lines standard deviations of the mean)

13 Ionospheric High Transi8on Height (HTH) Comparison between COSMIC and C/NOFS observations of HTH lat < 13, June-August, 2008 Heelis et al. 2009GL COSMIC C/NOFS Yue et al Presented at AGU

14 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) Modifica8ons to support Firmware modifica8ons Neutral Atmospheric Products Con8nue to inves8gate structural uncertainty in LT Explore new methods of BA op8miza8on Inves8gate ionospheric correc8ons and use of L2C Ionospheric Products Improve EDPs by using informa8on on horizontal gradients Improve Quality Control

15 Acknowledgments NSF Taiwan s NSPO NASA/JPL, NOAA, USAF, ONR, NRL Broad Reach Engineering