off-the-grid x-band weather radar network for the west coast
TRANSCRIPT
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Off-The-Grid X-band Weather Radar Network for the West
Coast of Puerto Rico José A. Ortiz CASA UPRM
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What is CASA? • Collaborative Adaptive Sensing Atmosphere • Multi-sector partnership
– Academia – Industry – Government
• UPRM, UMASS, OU and CSU
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10,000 ft
tornado
wind
snow
3.05 km
0 40 80 120 160 200 240 RANGE (km)
Horz. Scale: 1” = 50 km Vert. Scale: 1” -=- 2 km
5.4 km
1 km
2 km
4 km
gap
There’s a GAP in the lower atmosphere which cannot be sampled due to the earth curvature and distance between the radar and target.
Cayey NWS radar
Mayaguez
The Problem
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Puerto Rico Test Bed • Multi-level Research Team • Low infrastructure, Low Cost • Off-the-Grid Radars • Mesh Network on West Coast Puerto Rico • Weather Reflectivity Data • Data Processing and Visualization
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Radar Network
• Three Radars • Wireless Links • Servers • Relay Stations
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Network Node
• Weather Radar • Processing Computer • Wireless Link
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X-Band Weather Radar
Radar Specifications: • Furuno Marine Based • Frequency = 9.41 GHz • Peak Power = 4 kW / 25 kW • Operational Range = 15 / 30 km • Non Polarimetric • Non Doppler
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Network Behavior
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Monitoring Web App
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Results
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August 29, 2010
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Advantages • Low Cost
– Almost 10 times cheaper than current • Low infrastructure
– Low maintenance cost • Off the Grid • Better for uneven terrains • Improved resolution
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Limitations • Non polarimetric • Non Doppler
– Unable read velocity • Range
– 30km vs up to 460km • Power
– 25kW vs 1MW
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Future Work • Doppler Off-The-Grid radar • Improve system performance • Lower current cost • Better Merging algorithms • More Radars….
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PR Test Bed Team
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Questions • ???
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OTG vs CSU-CHILL
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UPRM Radar UPRM Radar
NWS Radar NWS Radar
Note the improved resolution
Note the improved Resolution
of one
These are upper layers
These are upper layers
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Some Results
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Remarks • Nodes localization are: 1. Cornelia Hill
2. CROEM
3. Aguadilla ( Finca montaña)
• Measurements have been taken when the Nexrad has been down
• Helped to discuss the high gusts during the Central American
games celebrated this last summer (2010)
• Reflectivity product is available
• Professors from hydrology have been able to make validation
studies using rain rate vs. their weather station grid
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Remarks • Current network can compliment the measurements taken by the Nexrad radar •Temporal resolution is at 3 min compared to the 5 min used by Nexrad
•Range resolution used is of 15 m compared to the 150 m of Nexrad
•The portal serves as a tool for the western coast community
•Clutter removal as a network and Doppler implementation is currently
under research for better product
•Data merge will enhance the current reflectivity plots