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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 25 January 2002
GW-NH StatusOverview • Facility Update • Facility Plans • Science Update • Science Plans • Operation Plans
GW-NH Status Facility Update
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
Facility UpdateControl Systems • Various control systems have been modified • Dome control system rewired and reprogrammed • Etalon controller noise/jitter suppressed
Facility UpdateLaser • Laser seeding issues • Thermal monitoring • Replaced cable • Replaced Piezo motor • Laser issues • Replaced trigger board • Replaced power supply • Reworked Pockels cell cable
GW-NH Status Facility Plans
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
GW-NH Status Science Update
Science UpdateTurbulence Investigation (J. McHugh) • Turbulence extraction algorithm is maturing • Results look promising • Awaiting new data to quantify the effects of noise reduction
GroundWinds AFRL
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
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
GW-NH Status Science Plans
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
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
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
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
GW-NH Status Operation Plans
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