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The NCAR 449 MHz Modular Wind Profiler Development Bill Brown, Steve Cohn, Brad Lindseth Terry Hock,...
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Transcript of The NCAR 449 MHz Modular Wind Profiler Development Bill Brown, Steve Cohn, Brad Lindseth Terry Hock,...
![Page 1: The NCAR 449 MHz Modular Wind Profiler Development Bill Brown, Steve Cohn, Brad Lindseth Terry Hock, Charlie Martin NCAR / EOL Jim Jordan, Dan Law, Warner.](https://reader036.fdocuments.in/reader036/viewer/2022062803/56649f385503460f94c54c6a/html5/thumbnails/1.jpg)
The NCAR 449 MHz Modular Wind Profiler Development
Bill Brown, Steve Cohn, Brad LindsethTerry Hock, Charlie MartinNCAR / EOL
Jim Jordan, Dan Law, Warner EcklundNOAA
Also collaborating with other groups (eg, University of Oklahoma)
![Page 2: The NCAR 449 MHz Modular Wind Profiler Development Bill Brown, Steve Cohn, Brad Lindseth Terry Hock, Charlie Martin NCAR / EOL Jim Jordan, Dan Law, Warner.](https://reader036.fdocuments.in/reader036/viewer/2022062803/56649f385503460f94c54c6a/html5/thumbnails/2.jpg)
“Workhorse” systems for many years.Mature stage of life-cycle Today’s technology ready to go higher and faster
•Three 915 MHz Wind Profilers with RASS
• Winds to ~3 km, temperature to ~ 1km
• 30-min time, 60-105 m height resolution
• Over 40 deployments since 1992
• Advances: MAPR spaced-antenna, Mobile-ISS, Ship operations
Legacy 915 MHz Wind Profilers
![Page 3: The NCAR 449 MHz Modular Wind Profiler Development Bill Brown, Steve Cohn, Brad Lindseth Terry Hock, Charlie Martin NCAR / EOL Jim Jordan, Dan Law, Warner.](https://reader036.fdocuments.in/reader036/viewer/2022062803/56649f385503460f94c54c6a/html5/thumbnails/3.jpg)
A larger network of boundary layer systems
Unmet needs based on years of requests
Also collaborative opportunities……
Winds to higher altitudes
Better time resolution
Simplified instrument setup and autonomy
A testbed for algorithm/technique development
![Page 4: The NCAR 449 MHz Modular Wind Profiler Development Bill Brown, Steve Cohn, Brad Lindseth Terry Hock, Charlie Martin NCAR / EOL Jim Jordan, Dan Law, Warner.](https://reader036.fdocuments.in/reader036/viewer/2022062803/56649f385503460f94c54c6a/html5/thumbnails/4.jpg)
Example: T-REX
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Boundary Layer Config.3 antenna modulesNetwork of 6
Mid-Tropospheric Config.7 antenna modulesNetwork of 2
Lower Stratospheric Config.19 antenna modules
200 m – 7 km30-200 m
300 m – 15 km100-200 m
Range:Resolution:
150 m – 4 km30 m
Not
to s
cale
!
One module
449 MHz Modular Wind Profiler449 MHz gives us the rangeModularity gives us the flexibility
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Modular Profiling Network(with 19 antenna modules available)
One station that samples throughout the troposphere
Two stations that sample a deeper cross-section downwind of the mountain range
Six stations that sample the boundary layer of an urban basin
Many configurations, one system, broad science
![Page 7: The NCAR 449 MHz Modular Wind Profiler Development Bill Brown, Steve Cohn, Brad Lindseth Terry Hock, Charlie Martin NCAR / EOL Jim Jordan, Dan Law, Warner.](https://reader036.fdocuments.in/reader036/viewer/2022062803/56649f385503460f94c54c6a/html5/thumbnails/7.jpg)
First deployment of 3-antenna prototype
PCAPS (Persistent Cold Pool Study)
Salt Lake, Utah, Dec 2010 - Feb 2011
Side-by-side comparison:• 915 MHz wind profiler• 449 MHz wind profiler (3 modules)
449 MHz Wind Profiler
915 MHz Wind Profiler
(N.B. a lot of fiddling and changes during the 2-months!)
![Page 8: The NCAR 449 MHz Modular Wind Profiler Development Bill Brown, Steve Cohn, Brad Lindseth Terry Hock, Charlie Martin NCAR / EOL Jim Jordan, Dan Law, Warner.](https://reader036.fdocuments.in/reader036/viewer/2022062803/56649f385503460f94c54c6a/html5/thumbnails/8.jpg)
449 MHz
915 MHz
449 Profiler Winds• Hardware performed well for most of 2-months
• Better 449 altitude coverage than 915
• Better time resolution is possible
• Captured the interface between valley flow and mountain crest flow (important for PCAPS science)
A day of 30-min winds
![Page 9: The NCAR 449 MHz Modular Wind Profiler Development Bill Brown, Steve Cohn, Brad Lindseth Terry Hock, Charlie Martin NCAR / EOL Jim Jordan, Dan Law, Warner.](https://reader036.fdocuments.in/reader036/viewer/2022062803/56649f385503460f94c54c6a/html5/thumbnails/9.jpg)
449 MHz Comparison with 915 MHz
449
915
![Page 10: The NCAR 449 MHz Modular Wind Profiler Development Bill Brown, Steve Cohn, Brad Lindseth Terry Hock, Charlie Martin NCAR / EOL Jim Jordan, Dan Law, Warner.](https://reader036.fdocuments.in/reader036/viewer/2022062803/56649f385503460f94c54c6a/html5/thumbnails/10.jpg)
449 MHz Comparison with 915 MHz
449915 High
915 Low
Winds percentagevs. Height
• Altitude coverage about 1 km greater
• 2 months of operations
• Median absolute difference < 2 m/s
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449 MHz: 5-minute wind resolution
4 hours
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449 Next Steps 3-panel prototype works well. Some outstanding
questions (e.g. algorithm details; minimum range)
Has allowed us to test components and concepts
Next steps:o Build seven antenna modules
o One 7-panel profiler or two 3-panel systems(Two BL or one mid-troposphere profiler)
o Status:o Construction underway (working around other commitments)
o Testing prototype next summer
Longer term: Mobile-449/ISS, RASS (Tv), Range Imaging Eventually…develop full 19-module system Early discussion: how to adapt for ship operations