1. BalloonWinds-GroundWinds Project Summary
James M. Ryan
University of New Hampshire
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2. Two GroundWinds Instruments
Bartlett, New Hampshire Mauna Loa, Hawaii
Laser 532nm (green) 5W 10Hz pulsed 355nm (UV) 5W 10Hz pulsed
Telescope 1/2 meter f/4 R-C Cassegrain 1/2 meter f/4 R-C Cassegrain.
Auto focus, auto alignment Auto focus, auto alignment
Etalon system Auto tune Fabry-Pérot etalons Auto tune Fabry-Pérot etalons
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3. GWNH Instrument c.a. 2000
Alternative slide in backups.
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4. GWHI Instrument c.a. 2004
Alternative slide in backups.
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5. BalloonWinds Gondola Size: 8′×8′×12′
Gondola Mass: < 2700 kg (3 tons)
Power Requirements: 1300 W
Power System:
20 Lithium-Ion Batteries
Thermal Management:
Ice and Electric Heaters
Optical Systems:
Diode-Pumped Nd:YAG
½-meter Telescope
Direct-Detection Receivers (2)
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6. Mission Objectives
Measure signal and line shape to confirm atmospheric & instrument responses from down- looking perspective.
Develop instrument performance model for space-borne system.
Assess subsystem scalability for space.
Measure wind velocity profiles with a quality limited only by instrument knowledge, photometric return and uncontrolled quantities.
Tried summarizing the four objectives in the report. Perhaps you could better this attempt.
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7. BW Instrument 2008, Holloman AFB
Alternative slide in backups.
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8. Launch, November 2008
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9. Reference Images Upon Return to UNH Before Launch
High resolution – only showing reference region (no sky region)
A lot of subsystems have to be working for this measurement to be made.
Interferometer misalignments minimal given the signal location on the chip did not move.
12-micron pixels and turning mirrors about 1-m away – no room for any angular movement.
Weak aerosol fringes due to a small (~10-micron) movement of the reference injection stage or filter box stage
Recycling efficiency changes due to a small (~10-micron) movement of the recycler stage
Before Launch
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10. Aftermath
Without an opportunity for a relaunch efforts were put toward
Up-looking data analysis
Instrument performance model
Up-looking data-model comparisons
Model predictions for space-borne LIDAR
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11. Instrument Performance Model
50+ input parameters
All subsystems components are modeled
Result simulates the raw measurement
Result is processed to predict
Signal strength
Measurement uncertainty
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12. BW Measurement
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13. BW Prediction Same scale as measurement. Camera noise not added.
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14. Comparisons Signal Strength
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15. Comparisons Wind Uncertainty
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16. Comparisons Wind Sensitivity
Agreement above 10^5 p.e. and below 7 m/s.
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17. Space-Borne Instrument
‘BalloonWinds-Like’ except
200 km position (0 km)
-60° elevation angle (45°)
20 W laser emission (3W)
1.5 m telescope (0.5 m)
80% quantum efficiency (0.4)
Improved transmissions and detector properties to address some BW deficiencies.
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18. Space-Borne Predictions
Solid = GTWS Enhanced Aerosol Model
Dashed = GTWS Background Aerosol Model
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19. Space-Borne Predictions
Solid = GTWS Enhanced Aerosol Model
Dashed = GTWS Background Aerosol Model
Results are above the 10^5 pe and below 7 m/s. i.e. in the validated region of the model.
Results suggest <3 m/s uncertainty from the parameters selected.
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20. The End Opportunities? Collaborations? Report available
$ S&H. Act now and get 2- for-1 with video. Hurry. Supplies limited. Offer not valid in NJ.
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