1. COSMIC Data Analysis and Archival Center
Status and Challenges
C. Rocken

2. CDAAC Responsibilities
Data collection and archival
Data processing near-realtime - ionospheric and tropospheric retrieval
Orbit determination, excess phase processing, profile retrieval, 1DVar processing
Data processing/validation for climate research
Data distribution in real-time and from on-line data base
Support scientists that use the data
Workshops and outreach

3. Over 2 Million profiles provided 4/21/06-01/14/08
Neutral Atmosphere
Ionosphere
674 registered users from 42 countries by 01/14/08

4. Quality of Tropospheric Profiles (Comparison w ECMWF)
Quality of Tropospheric Profiles (Comparison w NOAA/GFS)
Quality of Tropospheric Profiles (Comparison w ECMWF)

5. Latency of Real-Time Results
Profile latency at UKMO for FM4 last month - average 1h47m

6. Challenges we are working on
Increase the count of good profiles
New firmware - working with JPL
Improve satellite attitude control (NSPO)
RF anomalies - reasons not understood
Understand biases
Lowest troposphere neg. bias, 2-6 km positive bias, rising vs. setting stats bias
Improve ground fiducial coverage
MOU signed with EUMETSAT to receive data

7. Summary
Goals of data quality, latency, and reliability are met or exceeded for over 2 million profiles
Goal of daily profile count is presently not met (2500 vs. 1500) - due to hardware, satellite attitude control, and firmware problems
Current focus on operations and increase of profile count
Applied research related to understanding biases and extracting new information from data is ongoing