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WEATHER SCENARIOS GENERATOR WEATHER SCENARIOS GENERATOR AND SERVER FOR THEAND SERVER FOR THE
AIRSPACE AND TRAFFIC OPERATIONS AIRSPACE AND TRAFFIC OPERATIONS SIMULATIONSIMULATION
Presentation to the JPDO NextGen Demonstration Coordination Team
Chris Herbster ([email protected])
Applied Meteorology / ERAU – Daytona Beach
Project DescriptionProject Description Create a weather and aviation data archive
– coupled with a cataloging and searchable database Develop a way to create convection at a location
– Must be physically consistent with surrounding environment.
Developed to support research in NextGen applications for simulations at the NASA Langley Research Center Air Traffic Operations Laboratory (ATOL). – Initial focus is on ADSB based cockpit decision making
tools for airspace deconfliction in high density conditions.
Project is in second and final year (thru August 2010)
Weather DatabaseWeather Database
Server provides both archive and searchable interface
Data archive consists of ~8 months = 16 TBModular approach
– Separates metadata from actual data files– Allows easy creation of new search parameters
Data ArchiveData Archive Gridded Data Sets Rapid Update Cycle (RUC) model data Short Range Ensemble Forecast (SREF) National Convective Weather Diagnostic (NCWD) Current Icing Potential (CIP) Graphical Turbulence Guidance (GTG) National Radar Mosaic (ERAU product) NEXRAD Level-II Data NEXRAD Level-III Products Weather Impacted Traffic Index (WITI) (ERAU product similar to FAA)Text Data All Aviation Weather Center (AWC) text products, such as:
– Airman’s Meteorological Information (AIRMET)– Significant Meteorological Information (SIGMET) and convective SIGMET– Area Forecasts (FA)– Winds Aloft– Pilot Reports (PIREP)– Collaborative Convective Forecast Product (CCFP)
Center Weather Advisory (CWA)/Meteorological Impact Statements (MIS) Severe Watches from the Storm Prediction Center (SPC)
Metadata ConstructionMetadata Construction
Activities Completed – NCWD (National Convective Wx Diag.)– GTG (Graphical Turbulence Guidence)– CIP (Current Icing Potential)
To do– Need to write readers for some data– Need to fill in ASDI data (aircraft positions)
and construct WITI-like products
Database Regions - MethodDatabase Regions - Method
Country broken into small sqauresEach square assigned an idThese squares are then mapped with regions
– State (TBD)– Country (TBD)– Geographic region (TBD)– ARTCC– Airport
User InterfaceUser Interface
Basic functionality is in placeAllows search of
– One parameter– One Region– One time
User Interface cont.User Interface cont.
Optimizing queries– Some queries take up to 20 sec
Adding in AND / OR / NOT queriesStill many warts and intermediate
roadblocks to resolve
User Interface cont.User Interface cont.
Allow saving of queries– Back end is in place– Needs user management elements still
Correlate users with queries Users with groups
User Interface cont.User Interface cont.
Exporting data– Currently shows time +1 hour– Allow time stepping– Allow changing of time / window
Currently allows download of raw data– Add in packaging for running WRF– Other export options? (TBD)
User Interface DemoUser Interface Demo
http://wxnasa1.db.erau.edu/DatabaseSearch.html See other presentation for sample images
WRF Model Simulations of WRF Model Simulations of Convective Weather for the Convective Weather for the Evaluation and Testing of Evaluation and Testing of
NextGen Decision Making ToolsNextGen Decision Making Tools
Putting convective weather in places that nature didn’t.
Convective Hotspot MethodConvective Hotspot MethodInitial simulations –> Change Surface Albedo
Idea was to have solar heating drive convection Great idea, real world is more complicated! Clouds formed in area of hot spot quenched the solar
heating. Initial test region included a lake which stayed hot!
Current Approach Create a (very) hot lake! Lake temperatures presented here: 335K (143F), 350K (170F),
365K (197F), 380K (224F)
Convective Hotspot MethodConvective Hotspot MethodCurrent Approach
– Create a (very) hot lake! Interesting results for the three “cooler” lake
temperatures tested thus far A boiling lake [380K (224F)] didn’t work (yet?)
– Still a bit too simple for controlling intensity.– Coming simulations will look at thermodynamic
state in a region Perhaps CAPE or Lifted Index as an approximation of
forced convection intensity
Next StepsNext Steps
Code is written to work on arbitrary size domain as well as arbitrary size and location of hot spot
Development of throttling capability is being pondered.– A series (20+ simulations) of lake sizes and
temperatures have been run, analysis will continue after final exams(!)
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