1. GW-NH Status
25 January 2002

2. GW-NH Status Overview Facility Update Facility Plans Science Update
Science Plans
Operation Plans

3. GW-NH Status
Facility Update

4. Facility Update MWO 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 Update Laser Table Legged and Bolted

7. Facility Update Support Column Vertically Stabilized

8. Facility Update Telescope Bearings Tightened

9. Facility Update Dome Removal

10. Facility Update Dome Placement

11. Facility Update Dome Components

12. Facility Update Dome Shutter Motor

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

14. Facility Update Laser Laser seeding issues Laser 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 Plans Re-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 Update Turbulence Investigation (J. McHugh)
Turbulence extraction algorithm is maturing
Results look promising
Awaiting new data to quantify the effects of noise reduction

20. GroundWinds
AFRL

21. Science Update Spectral 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

22. Science Update PBL 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

23. Science Update PBL Investigations (J. Slater & M. Prentice)

24. GW-NH Status
Science Plans

25. Science Plans Mount 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

26. Science Plans Laser-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

27. Science Plans Depolarization 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

28. Science Plans Depolarization Ratio Measurements

29. Science Plans Depolarization Ratio Measurements

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

31. GW-NH Status
Operation Plans

32. 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