COSMIC

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Ground Based GPS Research at UCAR
John Braun/Ted Iwabuchi/So-Young Ha
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Outline

• Outline Areas of Research/Outreach
• What are we doing now?
• Why is it important that UCAR/NCAR be involved?
• Possible Collaborators
• National PW Analysis
• Current Networks
• Future Networks
• Data Assimilation
• 3D-VAR and 4D-VAR assimilation of PW
• Assimilation of SW
• Short Term Forecasting
• Refractivity SW
• Autonowcaster
• Community Support

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National Realtime Network
CONUS210 ASOS 40 Global 131
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CORS Networks
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SuomiNet Users
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Plate Boundary Observatory (PBO)
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Continuous Networks in Western US
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Post Process Network

• Value of Post-Processed GPS Observations
• Compute most accurate PW estimates on continental
  scale
• Allows for testing to improve absolute accuracy
• Provides densification with geodetic stations
  (PBO,SCIGN, BARGN, etc).
• Possible Collaborators/Possible Projects
• CGD (climate analysis)
• Water Cycle Initiative
• USGCRP (GEWEX)

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WRF 3DVAR Assimilation Studies
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MM5 4DVAR SW Assimilation Studies
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Short Term Forecasting

• Should be an area of highest potential of SW
• Will benefit most from dense networks

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S-Pol Refractivity and GPS SW
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Short Term Forecasting

• Possible Collaborators/Possible Projects
• RAP - Autonowcaster
• REFRACT (RAP Project in 2006)

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Community Support
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Community Support

• Promote GPS atmospheric sensing
• COMET Module
• Undergraduate and graduate teaching
• GPS analysis training and support
• Assimilation training and support

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Possible Collaborations/Proposals

• ATD/RAP
• Short Range Forecasting (lt 6 hours)
• Autonowcasting
• Radar/Refractivity and GPS
• Regional Forecasting (MMM)
• Climate Analysis (CGD)
• Reprocess and organize historical datasets
• Identify Systematic Errors