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GW-NH Status

GW-NH Status. 25 January 2002. GW-NH Status Overview. Facility Update Facility Plans Science Update Science Plans Operation Plans. GW-NH Status. Facility Update. Facility Update MWO Bartlett Research Facility. Facility Update.

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GW-NH Status

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  1. GW-NH Status 25 January 2002

  2. GW-NH StatusOverview • Facility Update • Facility Plans • Science Update • Science Plans • Operation Plans

  3. GW-NH Status Facility Update

  4. Facility UpdateMWO Bartlett Research Facility

  5. Facility Update • Structural fine-tuning of the instrument has been performed for ease of operation • Telescope bearings tightened • Laser table legged and bolted • Support column vertically stabilized • Dome replaced

  6. Facility UpdateLaser Table Legged and Bolted

  7. Facility UpdateSupport Column Vertically Stabilized

  8. Facility Update Telescope Bearings Tightened

  9. Facility UpdateDome Removal

  10. Facility UpdateDome Placement

  11. Facility UpdateDome Components

  12. Facility UpdateDome Shutter Motor

  13. Facility UpdateControl Systems • Various control systems have been modified • Dome control system rewired and reprogrammed • Etalon controller noise/jitter suppressed

  14. Facility UpdateLaser • Laser seeding issues • Thermal monitoring • Replaced cable • Replaced Piezo motor • Laser issues • Replaced trigger board • Replaced power supply • Reworked Pockels cell cable

  15. GW-NH Status Facility Plans

  16. Facility PlansRe-Integration • Resolve laser seeding issue ASAP • Full re-integration (1-week) • Replace motion controller • Implement fiber optic alignment system (FOAS) • Test etalon controller noise reduction • Post re-integration campaign (1-week) • Full utilization of system to test performance • Comparison with radiosondes

  17. GW-NH Status Science Update

  18. Science UpdateTurbulence Investigation (J. McHugh) • Turbulence extraction algorithm is maturing • Results look promising • Awaiting new data to quantify the effects of noise reduction

  19. GroundWinds AFRL

  20. Science UpdateSpectral Investigations (Q. Zheng & J. Ryan) • Spectral broadening model • Rayleigh scattering • Brillouin scattering • Turbulence • (Instrument function) • Information in broadened spectra • Temperature • Pressure • Kinetic energy dissipation • Aerosol-molecular ratio

  21. Science UpdatePBL Investigations (J. Slater & M. Prentice) • PBL can be characterized by A/M profile • PBL height and movement information • Extinction and visibility information • A and M decomposition requires a rigorous • Aerosol scattering model • Molecular scattering model • Turbulence broadening model • Instrument model

  22. Science UpdatePBL Investigations (J. Slater & M. Prentice)

  23. GW-NH Status Science Plans

  24. Science PlansMount Washington Valley Survey (J. McHugh) • Perform sweeps over the valley at different times of day and year to characterize • Turbulent regions • Gravity waves • Flow features over MT. Washington • Diurnal and seasonal patterns • Fundamental modes

  25. Science PlansLaser-Flow Interaction Studies (J. McHugh) • Fluid effects on laser • Wavefront deformation • Attenuation • Beam steering • Beam divergence • Laser effects on fluid • Local heating • Generation of acoustic waves

  26. Science PlansDepolarization Ratio Measurements • Measure the depolarization ratio of the backscattered beam • Depolarization ratio profile will help quantify the composition, size, and shape of aerosols • Distinguish ice, water, and dust

  27. Science PlansDepolarization Ratio Measurements

  28. Science PlansDepolarization Ratio Measurements

  29. Science PlansInstrument Optimization • Determine the optimum GW setup for a given investigation • Timing • Altitude binning • Azimuth angle/sweep rate • Time of day/year • Feasibility studies

  30. GW-NH Status Operation Plans

  31. Operation Plans • Goal: 50% up-time • Implement science plans • Web-based form for outside investigators • General science objective • Specific science objective • GW-NH data product • GW-NH setup (timing, altitude binning, etc.) • Collaborating personnel ivan.dors@unh.edu

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