Jose R. Linares Photonics Technology Department (PTD) Project Leaders: David A. Kozlowski, Steven M....
Transcript of Jose R. Linares Photonics Technology Department (PTD) Project Leaders: David A. Kozlowski, Steven M....
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Jose R. Linares
Photonics Technology Department (PTD)
Project Leaders: David A. Kozlowski, Steven M. Beck
Controlling Coherent Lidar Systemwith LabView
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Why Dust Devils?
A dust devil on Mars photographed by the Spirit rover on Sol 486 (the 486th day of the Martian year). Credit: NASA
Some Applications:- Surveillance-Remote Sensing-Tracking-Soft Rotating Targets-Dust Devils
2006 Dust Strom in Arizona
2007 Dust Devil in Eloy, Arizona
2008 Tornado Vortex in El Segundo, CA
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~ 700ft
~ 80ft
Deployment site: Eloy ,AzDate: May 30,2008
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Coherent Lidar MethodsIlluminating Solid moving Objects
2007 Deployment
Velocity Range (Modulated by Vel.)
FFT
TimeDomain
STFT
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Range with 37.5mm Resolution
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x
z
y
az 2el 2 az 1el 1
H1
H2
Azimuth Scan∆
X
x
z
y
el 2az
el 1
H1H2
Elevation Scan
Scanning Capability
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Images captured by IR Credit: Advanced Scientific Concepts, Inc.
Working On New Scanning Capability
- Get absolute range distances from target up to 5km
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Point of Contact: David A. Kozlowski
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GPS Antenna
IRIG-B Date/time stampFor Data & Video
Camera#2 is co-borsighedwith 1550nm Laser
Camera#1
Video combiner
IRIG-B date/time to Daq System
IRIG-B Date/time stamp Video to DVR
05/08/200911:01:24
System Hardware
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Program Overview
Main Loop #1-Int Stage (program and instruments)-Data Capture Stage-Data Save(binary) Stage-Move Pointer Stage-Update Polar Plot Stage -Scan option -Program Close Stage
Queue is used to pass data from save stage to FFT Loop#2
Features- Scan Targets - Keeps track of the total # of captured data shots per day and per button activation- Polar plot gives us topographical pointer position - Only plots target on Google Earth if target return is greater then set filter value
FFT Loop #2-Performs FFT-based spectral measurements on target frequency response- Obtains peak frequency and calculates target distance(m) from pointer.-Calculates target latitude and longitude.- Saves calculated values as a .kml file
G.E. Loop #3-Opens .kml file-Plots calculated latitude and longitude on Google Earth target distance(m).-Also calculates target latitude and longitude
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Program Front Panel
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Program Block Diagram
Main Loop #1
FFT Loop #2
Goggle Earth Loop #3
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Coherent Lidar Methods2007 Deployment
Challenges: Relentless Heat, Pounding Sunshine, Dust, Bugs, Snakes and Wild Dogs
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FY08, funding issues made us move from this platform to
Choosing Vehicle
Wanted This
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Got This
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Retrofitting Cargo Container
Steve Beck Jose LinaresMike Williams
David Kozlowski
Some of the task performed during construction included
- Welding - Electricity- Install Insulation- Cut holes-Install floor-Install wood panels
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Coherent LIDAR Container