COSMIC: Constellation Observing System for Meteorology, Ionosphere and Climate Mission Status and Results UCAR COSMIC Project FORMOSAT-3

Current Constellation May 7, 2007

Over 1 Million Profiles Neutral Atmosphere Ionosphere

Operator Interface - 6 Sat Dump Overview

Operator Summary - Orbit maneuvre

Example Operator Dump Information

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 All satellites and payloads working FM2 lost 1 solar panel - currently only operating GPS receiver (TIP + TBB turned off) due to power limitations 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

Neutral Atmosphere Results

The Effect of Open Loop Tracking

Penetration of setting/rising soundings

Detecting the Atmospheric Boundary layer with RO

Global Distribution and Height of ABL

Climate

COSMIC - CHAMP Mission Comparison

Ionosphere and Space Weather

Comparisons with ISR data [Lei et al., submitted to JGR 2007]

Trans-Ionospheric Rays in 100 minutes

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COSMIC Atmospheric River Study A Collaboration between NOAA ESRL: Marty Ralph, Paul Neiman and Gary Wick UCAR COSMIC: Bill Kuo, Tae-Kwon Wee, Zaizhong Ma

Southern Hemisphere Forecast Improvements from COSMIC Data Sean Healey, ECMWF

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 Without COSMIC With COSMIC Results from Hui Liu, NCAR

Using COSMIC for Hurricane Ernesto Prediction GOES Image With COSMIC GOES Image from Tim Schmitt, SSEC

Atmospheric River case: Nov 6-8, 2006

Observed Daily Precipitation 24-h precipitation Ending at 1200 UTC 7 November 2007

PW estimated from COSMIC GPS RO data

Comparison of PW data from COSMIC and global analyses From: Wee and Kuo (2007) PW retrieved from COSMIC GPS RO data using NCEP or ECMWF analysis as first guess PW derived from NCEP or ECMWF analyses

Comparison of SSM/I retrieval with COSMIC

Comparison of global analyses with COSMIC in PW

Bias of SSM/I retrieval compared with COSMIC +: Schluessel start : Alishouse triangle: Petty square: Wentz SSM/I retrieval shows visible bias when clouds are present