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COSMIC: Constellation Observing System for Meteorology, Ionosphere and Climate. Mission Status and Results UCAR COSMIC Project. FORMOSAT-3. Launch on April 14, 2006, Vandenberg AFB, CA. All six satellites stacked and launched on a Minotaur rocket

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cosmic constellation observing system for meteorology ionosphere and climate

COSMIC: Constellation Observing System for Meteorology, Ionosphere and Climate

Mission Status and Results

UCAR COSMIC Project

FORMOSAT-3

slide2

Launch on April 14, 2006, Vandenberg AFB, CA

  • All six satellites stacked and launched on a Minotaur rocket
  • Initial orbit altitude ~500 km; inclination ~72°
  • Will be maneuvered into six different orbital planes for optimal global coverage (at ~800 km altitude)
  • Satellites are in good health and providing data-up to 2200 soundings per day to NOAA

COSMIC launch picture provided by Orbital Sciences Corporation

cosmic final deployment
COSMIC - Final Deployment
  • 6 Planes
  • 71 Degrees inclination
  • 800 Km
  • 2500 Soundings per day
  • Latency 50-140 minutes from observation to NOAA

Courtesy NSPO

over 1 million profiles
Over 1 Million Profiles

Neutral Atmosphere

Ionosphere

slide8

Getting COSMIC Results to Weather Centers

Operational Processing

TACC

JCSDA

NCEP

Input

Data

NESDIS

CDAAC

ECMWF

CWB

GTS

UKMO

BUFR Files

WMO standard

1 file / sounding

JMA

Canada Met.

Science & Archive

NRL

Data available to weather centers within < 180 minutes of on-orbit collection

slide15

Summary of JPL-provided GOX firmware improvements from build 4.0 to build 4.3

B4.0 to B4.2:

1) Fix corrupted Nav message due to tracking on the POD antenna through the atmosphere.

2) Fix to rising occultation OL -> CL transitions.

B4.2 to B4.2.1:

1) Double precision P2 Phase in QuadraticFitObservable packet.

2) Adjustments to forward POD scheduling to facilitate ionospheric occultations, and fix a bug that turned off high-rate reference data too early

3) Adjustments to drift time for setting occultations

4) Changes to open loop model

B4.2.1 to B4.3:

1) Fix bug in which the azimuth window on occultation antennas was limited to a maximum of 45 degrees. Azimuth can now be commanded to maximum of 75 degrees

2) Fix bug that causes rising occultations to end earlier than at the commanded height

3) Insertion of S4 scintillation parameter into the unused P1 SNR field of quad fit packets. The value is now a short integer representing an SR pseudo-variance factor.

4) Fix a bug that causes integer cycle slips during transition from open to closed loop tracking of rising occultations

5) Fixes to az/el reporting in occultation log messages. Also improved consistency in the formatting of the messages

6) Fix to bug that sometimes causes receiver to halt acquisition and tracking of a particular PRN.

B4.3 to B4.4 (planned for May 2007)

1) Double L2 tracking loop bandwidth to reduce soundings that fail for “bad L2”. Avoid wrapping of L2.

2) Add ability to use either POD antenss as reference antenna and as navigation antenna.

3) L2C tracking

status of satellites cdaac

Status of Satellites / CDAAC

  • All satellites and payloads working
  • FM2 lost 1 solar panel - currently only operating GPS receiver (TIPP + TBB turned off)
  • GPS receiver on FM6 shows erratic behavior (sudden drop in SNR on some antennas sometimes for minutes sometimes for days) - this results in loss of data
  • Still some data lost to infrequent data dumps (mainly during orbit raising periods)
  • Some attitude control problems
  • CDAAC purchased a new processing cluster for reprocessing for climate product
impact study with cosmic
Impact study with COSMIC
  • 500 hPa geopotential heights anomaly correlation (the higher the better) as a function of forecast day for two different experiments:
    • PRYnc (assimilation of operational obs ),
    • PRYc (PRYnc + COSMIC)
  • We assimilated around 1,000 COSMIC profiles per day
  • Results with COSMIC are very encouraging
using cosmic for hurricane ernesto prediction
Using COSMIC for Hurricane Ernesto Prediction

With COSMIC

Without COSMIC

Results from Hui Liu, NCAR

using cosmic for hurricane ernesto prediction1
Using COSMIC for Hurricane Ernesto Prediction

With COSMIC

GOES Image

GOES Image from Tim Schmitt, SSEC

first collocated ionospheric profiles
First collocated ionospheric profiles

From presentation by Stig Syndergaard, UCAR/COSMIC

slide37

Scintillation Sensing with COSMIC

No scintillation

S4=0.005

Scintillation

S4=0.113

Where is the source

Region of the scintillation?

GPS/MET SNR data

slide39

COSMIC Data Access

More than 496 data users have registered

  • http://www.cosmic.ucar.edu
  • * Select the 'Sign Up ' link under
  • COSMIC
  • Accept data use agreement
  • * Enter information:
  • Name, Address, email, user_id,
  • Password, planned use of data
  • An email will be sent within 2-3
  • business days to indicate
  • access has been granted.