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

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 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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