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GroundWinds Update

GroundWinds Update. Ivan G. Dors June 2005. GroundWinds Update Outline. GWNH/GWHI Instrument Specs Status Schedule Consistency Checks Fringe consistency Photon recycling consistency Preliminary GWHI Validation Results. GWNH Instrument. Direct-detection Doppler lidar

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GroundWinds Update

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  1. GroundWinds Update Ivan G. Dors June 2005

  2. GroundWinds Update Outline • GWNH/GWHI • Instrument Specs • Status • Schedule • Consistency Checks • Fringe consistency • Photon recycling consistency • Preliminary GWHI Validation Results

  3. GWNH Instrument • Direct-detection Doppler lidar • Operates at 532 nm • 4 W @ 10 Hz • 0.5 meter aperture • High-resolution molecular and aerosol channels • CCD detectors • 0.7-18 km range ASL

  4. GWNH Status • Fully-operational • Operated weekly (weather-permitting) • 2003 mini-MOPA campaign being analyzed

  5. GWNH Schedule • Test bed for BalloonWinds • Weekly operations • Instrument diagnostics • Improve data analysis & products • Science • BW Validation campaign in Jan 06

  6. Direct-detection Doppler lidar Operates at 355 nm 4 W @ 10 Hz 0.5 meter aperture High-resolution molecular channel CCD detector 4.0-21 km range ASL GWHI Instrument

  7. GWHI Status • Fully-operational • Operated daily (weather-permitting) • June 2005 validation campaign being analyzed

  8. GWHI Schedule • Daily operations (UH) • Instrument diagnostics & data consistency • Improve data analysis & products • Incorporate into local models • Science • Mauna Kea Seeing Campaign July 05 • 8 radiosonde launches before Nov 05

  9. Raw Measurement Signal Region Unused Region Initial Photons Recycled Photons Function of Range Sky Return Region Reference Region Non-Linear Function of Wavelength

  10. Fringe Consistency CheckSignal Strength (top) & LOS Velocity (bottom) 3rd Fringe 1st Fringe 2nd Fringe

  11. Recycling Consistency Check ISignal Strength (GWNH) No Recycling Recycling Molecular Aerosol

  12. Recycling Consistency IILOS Velocities (GWNH) No Recycling Recycling Molecular Aerosol

  13. GWHI Validation Campaign • Objective is to quantify the precision, accuracy, sensitivity, and the photon-recycling performance enhancement of LOS velocity measurements. • Lidar made 10-minute measurements to the W, NW, N, NE, E, and back to W. • Radiosondes launched from the site for inter-comparison.

  14. Preliminary GWHI Validation ResultsWind Speed

  15. Preliminary GWHI Validation ResultsWind Direction

  16. Preliminary GWHI Validation Results’Vertical Wind’

  17. Preliminary GWHI Validation ResultsExtinction:Backscatter

  18. New GW Web Pagegroundwinds.sr.unh.edu

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