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COSMIC: Constellation Observing System for Meteorology, Ionosphere and Climate Mission Status and Results UCAR COSMIC Project FORMOSAT-3
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Current Constellation May 7, 2007
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Over 1 Million Profiles Neutral Atmosphere Ionosphere
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Operator Interface - 6 Sat Dump Overview
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Operator Summary - Orbit maneuvre
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Example Operator Dump Information
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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
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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
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Neutral Atmosphere Results
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The Effect of Open Loop Tracking
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Penetration of setting/rising soundings
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Detecting the Atmospheric Boundary layer with RO
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Global Distribution and Height of ABL
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Climate
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COSMIC - CHAMP Mission Comparison
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Ionosphere and Space Weather
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Comparisons with ISR data [Lei et al., submitted to JGR 2007]
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Trans-Ionospheric Rays in 100 minutes
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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. COSMIC Data Access More than 496 data users have registered
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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
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Southern Hemisphere Forecast Improvements from COSMIC Data Sean Healey, ECMWF
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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
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Using COSMIC for Hurricane Ernesto Prediction Without COSMIC With COSMIC Results from Hui Liu, NCAR
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Using COSMIC for Hurricane Ernesto Prediction GOES Image With COSMIC GOES Image from Tim Schmitt, SSEC
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Atmospheric River case: Nov 6-8, 2006
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Observed Daily Precipitation 24-h precipitation Ending at 1200 UTC 7 November 2007
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PW estimated from COSMIC GPS RO data
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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
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Comparison of SSM/I retrieval with COSMIC
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Comparison of global analyses with COSMIC in PW
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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
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