1. Status of COSMIC and Missions of Opportunity
Bill Schreiner
and CDAAC Team
COSMIC Retreat
Oct 13, 2011

2. Outline
COSMIC Mission
CDAAC Status
Missions of Opportunity

3. NESDIS CDAAC COSMIC Operational Processing
Getting COSMIC Results to Weather Centers
COSMIC Operational Processing
TACC
JCSDA
NCEP
RTSs:
Alaska
Norway
McMurdo
Wallops
Ny-alesund
Cordoba
AF/Hanscom
NESDIS
UCAR/Unidata’s
LDM
CDAAC
ECMWF
Research
Community
WGET
CWB
GTS
WMO
BUFR Files
per day with
Latency ~ 75-90min
Input Data
COSMIC data
Attitude data
GPS ground data
GPS NDM Bits
GFS Forecast
IGS/IGU ORB/CLK
Bernese Config files
UKMO
JMA
SFTP
AFWA
Canada Met.
Meteo
France
Science & Archive
Providing data to > 1,691 registered users from 61 countries

4. CDAAC Profiles COSMIC Occultation CNOFS Occultation
The number of ionospheric soundings have decreased recently because of some satellite troubles, especially antenna problems which have prompted us to us use the forward-facing POD antenna--this cuts out many ionospheric occultations. 4

5. Successful CDAAC Profiles Apr 21, 2006 – Oct 9, 2011
COSMIC Neutral Atmosphere ~ 3.0M
COSMIC Ionosphere EDPs ~ 3.0M
The number of ionospheric soundings have decreased recently because of some satellite troubles, especially antenna problems which have prompted us to us use the forward-facing POD antenna--this cuts out many ionospheric occultations. 5

6. ~90% available within 3 hrs Average 75-90 min for single orbit dump
Data Latency
Out of Contact
The number of ionospheric soundings have decreased recently because of some satellite troubles, especially antenna problems which have prompted us to us use the forward-facing POD antenna--this cuts out many ionospheric occs.
~90% available within 3 hrs
Average min for single orbit dump

7. COSMIC Payload SNRs (L1/L2)7

8. COSMIC Firmware Status
Tested new firmware version on FM5 in May 2011
L2C tracking
Setting occultations are high quality
Lower than expected number of L2C rising occultations. JPL investigating
Store GPS ephemeris
Improved rising occultations after reboot
Occasional flash corruption. Flash must be reset. JPL investigating problem
Future Update, 4.5.6:
Add option to track only setting L2C occultations
Soon after, upload to all Spacecraft

9. CDAAC Design CDAAC File types in RED tipLv1 (Radiances) scnLv1 (S4/σΦ)
Scint.
podObs
Atmospheric processing
RINEX
atmPhs
atmPrf
(α,N,T,P)
Abel Inversion
1-D Var
Moisture
Correction
Excess Phase
Level 0--level 1
LEO Science and SOH data
wetPrf
bfrPrf
Real time Task Scheduling Software
GNSS Clock Estimation
LEO POD
Profiles
ionPrf
(EDPs)
Ionospheric processing
GNSS ground data
GNSS NDM Bits
IGS/IGU ORB/CLK
Bernese Config files
GFS Forecast
Absolute
TEC
Excess Phase
Ionospheric Inversion
ionPhs
podTec (TEC)

10. CDAAC High Availability
Active
I/O
Computer
Backup
File server
File
server
4 – 6 Processing Nodes
High Speed (10 GigE) Internal net
Non - VIP
Out Only
I/O : Data providers and VIP only. (Gig E)
Linux HA with DRBD mirroring
Linux HA (High Availability) on IO servers
DRBD replication
Heartbeat detection
One server active, one server on hot standby
Two completely redundant clusters for data processing
Includes separate RAIDs
Both systems ‘think’ they are primary
Configuration management
CentOS RPMs
CDAAC RPMs
Configuration repository and verification tool
Backup power
UPS
Diesel generator
System Monitoring
Active/Backup geographically isolated
CDAAC availability > 99.5 %

11. CDAAC R&D System Configuration and Monitoring GNSS Processing
ZTD, GNSS Clocks, LEO POD, excess phase
Neutral Atmospheric Inversions
Improve wave optics processing
Improve bending angle optimization
1DVAR retrievals
Ionospheric Processing
Absolute TEC
Electron density retrievals
Investigate QC and perform additional validation studies

12. CDAAC Status New Operational HW working well
Testing new Re-Processing Cluster
Released CDAAC 3.11 to TACC
Processing data from all available missions, including ionospheric products

13. Processing Data from MOOs at CDAAC
Interface with RTS downlink
Decoding and formatting binary level 0 science payload data
System modification, configuration and management
Data processing modifications
Testing and validation
NRT operations and monitoring
Post-processing, archival, maintenance
Program and TAA management
Recent experience with C/NOFS, SAC-C, Metop/GRAS, KOMPSAT-5

14. GNSS RO Possible Missions of Opportunity (MOOS)

15. Metop/GRAS Metop/GRAS Data Gaps lead to processing differences
Metop/GRAS bending angle differences of several percent in LT for different processing modes
Mission Independence of RO
COSMIC-Metop bending angle bias between 40 and 60km ~ 3e-8 rad, (0.02%) at 20 km altitude

16. Missions of Opportunity
SAC-C power anomaly. Return to service possible.
C/NOFS nominal. Possible to increase # of soundings
Metop/GRAS nominal. Waiting for EUMETSAT on NRT data use.
KOMPSAT-5 (IGOR+), Launch ~Dec 2011
Preparing CDAAC to process data
Preparing TAA for operational and trouble-shooting support
Spanish PAZ mission (IGOR+). MOU finalized. TAA soon.
EQUARS MOU and TAA next.

17. Missions of Opportunity
TerraSAR-X, German mission, Launch Jun 2007
BRE IGOR
GFZ providing NRT ~200 setting profiles to GTS (UCAR assisted GFZ in debugging problem)
Tandem-X, German mission, Launch Jun 2010
Similar orbit as TerraSAR-X, useful for scientific studies
OCEANSAT-2, Indian mission, Launch Sept 2009
ROSA receiver
Commissioning phase, no data available
Aquarius/SAC-D, US/Argentina, Launch June 2011

18. Daily Occultation Count currently operating and future missions
Occultations per day

19. Support to the Community
Providing data/support to 1691 data users from 61 countries
Providing NRT data to NWPs, AFWA, and 79 university users via Unidata’s LDM
Support field programs (VOCALS, TimRex, Dynamo)
~300 peer-reviewed publications about COSMIC and GPS/MET. The COSMIC team C/N ratio is ~33
Providing algorithm, software and processing support (RO-Trends, ..)
Hosting/Organizing data users and climate workshops and student programs
Providing science and engineering support to NOAA for COSMIC-2 mission, and to MOOs
Data Downloaded ~223TB
(~1/3 from university community)