Jose R. Linares
Photonics Technology Department (PTD)
Project Leaders: David A. Kozlowski, Steven M. Beck
Controlling Coherent Lidar Systemwith LabView
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
~ 700ft
~ 80ft
Deployment site: Eloy ,AzDate: May 30,2008
Coherent Lidar MethodsIlluminating Solid moving Objects
2007 Deployment
Velocity Range (Modulated by Vel.)
FFT
TimeDomain
STFT
Range with 37.5mm Resolution
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
Images captured by IR Credit: Advanced Scientific Concepts, Inc.
Working On New Scanning Capability
- Get absolute range distances from target up to 5km
Point of Contact: David A. Kozlowski
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
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
Program Front Panel
Program Block Diagram
Main Loop #1
FFT Loop #2
Goggle Earth Loop #3
Coherent Lidar Methods2007 Deployment
Challenges: Relentless Heat, Pounding Sunshine, Dust, Bugs, Snakes and Wild Dogs
FY08, funding issues made us move from this platform to
Choosing Vehicle
Wanted This
Got This
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
Coherent LIDAR Container