Progress Report Light Detection and Ranging

1
Progress ReportLight Detection and Ranging

• Dr. José M. Rosado Román
• Dorianne Alvarado David
• Sasha J. Cintrón Pacheco

2
What have we learned?

• Lidar Technology
• Emitted light (IR, visible, UV) interacts with
  environment
• Some of the transmitted light is
  reflected/backscattered.
• The backscattered signal is collected and
  analyzed.
• Application to study aerosols in the troposphere
  and stratosphere.

3
What are we studying?

• Books
• Takashi Fujii, Tetsuo Fukuchi. Laser Remote
  Sensing. 2005
• Chapter 4 Trace Gas Species Detection in the
  Lower Atmosphere by Lidar
• Measures, Raymond M. Laser Remote Sensing
  Fundamentals and Applications. 1984
• Chapter 5 Laser Fundamentals
• Chapter 6 Laser Systems as Remote Sensors
• Chapter 7 Laser-Remote-Sensor Equations
• Chapter 8 Analysis and Interpretation of the
  Lidar Return Signals
• Chapter 9 Atmospheric Lidar Applications
• Qihao Weng, Dale A. Quattrochi. Urban Remote
  Sensing.
• Chapter 11 González, Jorge E., Comarazamy,
  Daniel E. Urban Heat Island Identification and
  Climatological Analysis in a Coastal, Tropical
  City San Juan, Puerto Rico

4
What are we studying?

• Papers
• Althausen, Dietrich. Scanning 6-Wavelength
  11-Channel Aerosol Lidar. 1999
• Comarazamy, Daniel E. Effects of Atmospheric
  Particle Concentration on Cloud Microphysics over
  Arecibo. 2005
• Lectures/Seminars

5
What are we doing?

• Quotation request for Laser Power Meter, with the
  following requirements
• Pulse repetition 20 pps
• Duty Cycle 9 ns pulse
• Wavelengths 355 nm, 532nm, and 1064 nm
• Energy per pulse 140 mJ (for 355 nm wavelength),
  300mJ( for 532 nm), 700 mJ( for 1064 nm)
• Laser Beam diameter 9mm
• Some of the companies contacted so far are
  Optics, Gentec, Kupo, New Focus , Bright
  Solutions, Fiber Optics, Coherent, Thorlabs,
  Spiricon, among others.

6
Difficulties?

• To obtain the Laser Power Meter

7
Ongoing Projects

• Air Quality
• Testbed for Daytime Lidar at Arecibo
• Collaborators
• Israel González- Undergraduate Student (ECE
  Dept)
• Jonathan Friedman- Cornell University
• Duration
• November 2006- May 2007
• Status on schedule
• Description
• Design of a potassium cell oven.
• Implementation of a Faraday Anomalous Dispersion
  Optical Filter (FADOF) to allow the Arecibo
  Potassium LIDAR to make daytime obsevations from
  the upper mesosphere to the lower thermosphere.

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Ongoing Projects

• Air Quality
• Testbed for Daytime Lidar at Arecibo

9
Ongoing Projects

• Air Quality
• UPRM- Lidar Development
• Collaborators
• Sasha Cintrón- Undergraduate Student (ECE
  Dept)
• Dorianne Alvarado- Undergraduate Student
  (ECE Dept)
• Craig Tepley- Cornell University
• Mark Chang- UPRM
• Duration
• November 2006- October 2011
• Status on schedule
• Description
• Purchased Lidar Workstation.
• Purchasing a pulse energy meter.

10
Ongoing Projects

• Air Quality
• Design and Implementation of a Wireless Data
  Logger Interface
• Collaborators
• Julio Cintrón- Undergraduate Student (ECE
  Dept)
• Eric Harmsen- UPRM
• Duration
• November 2006- June 2007
• Status on schedule
• Description
• Purchased equipment for a remotely accessible
  data logger.

11
References

• Takashi Fujii, Tetsuo Fukuchi. Laser Remote
  Sensing. 2005
• Measures, Raymond M. Laser Remote Sensing
  Fundamentals and Applications. 1984
• Qihao Weng, Dale A. Quattrochi. Urban Remote
  Sensing.
• Althausen, Dietrich. Scanning 6-Wavelength
  11-Channel Aerosol Lidar. 1999
• Comarazamy, Daniel E. Effects of Atmospheric
  Particle Concentration on Cloud Microphysics over
  Arecibo. 2005
• www.optowire.com/COHR/cohr_fieldmaxTOP.html
• http//apollo.lsc.usc.edu/classel/
• www.spie.org
• www.answer.org