Date post: | 22-Dec-2015 |
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Code 912, Principle Investigator:
Mr. Bruce Gentry
NASA Academy Research Associate
Jeremy Dobler
Why Study Winds?
Winds are the most important variable studying dynamics and transport in the atmosphere.
Wind measurements are critical to improvement of numerical weather prediction models.
Global wind measurements are essential to NASA’s Earth Science Enterprise mission.
They can be used to study planetary atmospheric dynamics.
Commercial and military aircraft would benefit from clear air wind shear detection as well.
Doppler Lidar Wind Measurement Concept
Molecular ()
Aerosol ()
Backscattered Spectrum
Frequency
My Contribution
355 nm Receiver Setup
Moving From Larger to Smaller Systems.
Miniature Dual-Frequency Lidar Components
Solid Fabry-Perot etalon
• 95% reflectivity @ 860 nm
• 15 mm gap
•Finesse ~ 61 FSR ~ 6.66 GHz
• Semi-Conducting Diode Laser (AlGaAs)
• = 852.2 nm
• Power ~ 150 mW CW
Mini-Lidar Breadboard Setup
Future Work!
Complete software interface to automate the modulation of the laser and lock the signal on the edge of the Fabry-Perot etalon filter.
Integrate breadboard system into a mobile container.
Verify velocity measurements on a hard target in lab
Take actual atmospheric data in the field demonstrating the mini-lidar system.
Thank You To:
The Wisconsin Space Grant Consortium Goddard Space Flight Center University
Programs and the Director’s Discretionary Fund.
Also to: The Academy Staff and all of the
participants of this program. The Staff and Faculty at UW-L