449 mhz modular wind profiler
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449 MHz Modular Wind Profiler. William Brown Atmospheric Profiling Group (ISS & GAUS) EOL / ISF. Brad Lindseth, Charlie Martin, Jen Standridge, Tim Lim, Lou Verstraete, Steve Cohn, Terry Hock EOL / ISF & CDS & DFS. With help from: Jim Jordan, Dan Law, Warner Ecklund ( NOAA)

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449 MHz Modular Wind Profiler

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449 mhz modular wind profiler

449 MHz Modular Wind Profiler

William Brown

Atmospheric Profiling Group (ISS & GAUS)

EOL / ISF

Brad Lindseth, Charlie Martin,

Jen Standridge, Tim Lim, Lou Verstraete,

Steve Cohn, Terry Hock

EOL / ISF & CDS & DFS

With help from:

Jim Jordan, Dan Law, Warner Ecklund (NOAA)

Phil Chilson (OU), Zoya Popovic (CU)

Plus others in the community

EOL EAC 8 Nov 2012


Current radar wind profilers

Current radar wind profilers

  • Four LAP3000 profilers

  • 915 MHz 400W

  • Boundary layer only

  • Mature technology

  • DBS Winds

  • 15 – 30 minutes

Dynamo Project


Typically deployed with integrated sounding system iss

Typically deployed with Integrated Sounding System (ISS)

Diego Garcia, BIOT

Wind Profiler

R/V Revelle

Wind Profiler


Iss wind profilers 40 projects

ISS Wind Profilers : 40+ projects

  • Wide range of science targets

  • But:

  • Inflexible

  • One size fits all

Mobile ISS at PLOWS

Toga-COARE IDASS Lantex Quad/MASS Reno-Basin LABEX ARM/OK Small-Cu/MS ACE-1 Flatland/LIFT Juneau BLX JETEX CASES-97&99 TOCS FASTEX Lake-ICE Forrest-ABL BAO Nauru-99 Atlas PROPHET Transitions VTMX ISPA FDI/JHU IMPROVE IHOP NAME SRP T-REX Metcrax Climode AHATS CPS PLOWS PCAPS DYNAMO DC3


449 mhz modular wind profiler1

449 MHz Modular Wind Profiler

  • Development to extend our wind profiler capabilities

  • Longer wavelength enables higher altitudes

  • Fast wind measurements (spaced antenna)

  • Modular to give more flexibility

  • Easy to deploy

Hexagonal

Module

PCAPS Project


Modularity

Modularity

3-module system

2 kW amp

Profiles through boundary layer

7-module system

8kW or 16kW amp

Profile to mid-troposphere

Eventually 19-module system

16kW or 32kW

Full troposphere to UTLS


Example t rex

Example: T-REX

MISS

ISS

MAPR


3 panel pcaps deployment

Winter cold pool, Salt Lake valley

3-panel PCAPS deployment

915 MHz

449 MHz


3 panel 449 mhz comparison with 915 mhz

3-panel 449 MHz Comparison with 915 MHz

  • 2 months

  • Altitude coverage 500m – 1km greater

  • Median abs diff ~ 1.5 m/s

Winds percentage

vs. Height

449

915 High

915 Low


7 panel

7-panel

Latest developments

Expansion to 7 panels

So far using:

2 kW TX amp

3 channel data system


915 cf 7 panel 449

915 cf 7-panel 449

915MHz high mode

449MHz 7-panel

7-panel 449 typically seeing 1 – 2 km higher


Rapid winds

Rapid Winds

Vertical velocity &

5 minute winds

Note apparent waves


Current work

Current Work

  • Completing 7-panel system:

  • 7-channel data system

  • Dual 8kW amplifiers

  • Upgraded front-end boxes

  • Mounting frame

  • Analyzing tests

  • Limitations:

  • Limited range resolution (~ 150m)

  • Processing and algorithms need work

  • Can see higher than 915s, but not low gates

  • Clutter, RFI & artifact rejection


Next steps

Next steps

  • RIM

  • Range IMaging

  • Enables improvement in range resolution

  • Small inter-pulse steps in wavelength

  • Aiming to go from 150 m down to < 50 m

  • Funds identified for RIM expert to visit next summer

Improve processing

Reduce lowest range gate

Add diagnostics

Mobile version (449 MISS)

RASS (Radio Acoustic Sounding System)


Summary

Summary

  • Prototype systems working well - Promising technology

  • Completing seven antenna modules

    • One 7-panel profiler OR two 3-panel systems(Two BL or one mid-troposphere profiler)

    • Adding power (16kW) and data channels (3->7)

  • Approx 4 FTE years effort (Eng, SWE, Techs, Scientists)

  • Next Steps

    • Test deployments : capabilities and limits

    • Adding RIM

    • RASS, diagnostics, Mobile, lower gates, processing

  • Three user proposals received already

    • Front-Porch, DEEPWAVE, PECAN

    • Longer term:

      • Ship operations

      • Full 19-module system


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