Active standoff mixing-ratio measurements of N 2 O from topographic targets using an open-path quantum cascade laser system

Roman Basistyy, Adrien Genoud, Adrian Diaz, Fred Moshary, Benjamin Thomas

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Active stand-off detection and hard-target lidars are common methodologies for gas identification, chemical emission tracing, hazardous material sensing, or explosive detection to name a few. By their nature, this type of instrument heavily relies on the reflectivity or backscattering properties of distant targets. While some applications allow the use of retroreflectors, most mobile systems require the use of actual topographic targets, such as the ground, roads, buildings, roofs, or vegetation. In this work, N 2 O path-averaged mixing ratios are measured with the 10 Hz frequency using a quantum cascade laser open path system operating at 7.7 μm wavelength. Measurements are performed by detecting the light backscattered from common topographic targets located 5.5 m away from the instrument. For each topographic target, the detection limit and accuracy of the retrieved mixing ratios are presented and discussed showing detection limits between 0.008 and 1.36 ppm depending on the target and mixing ratio relative errors between 4 and 80 %.

Original languageEnglish (US)
Title of host publicationLidar Remote Sensing for Environmental Monitoring XVI
EditorsUpendra N. Singh, Nobuo Sugimoto
PublisherSPIE
ISBN (Electronic)9781510621336
DOIs
StatePublished - 2018
EventLidar Remote Sensing for Environmental Monitoring XVI 2018 - Honolulu, United States
Duration: Sep 24 2018Sep 25 2018

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume10779
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Other

OtherLidar Remote Sensing for Environmental Monitoring XVI 2018
Country/TerritoryUnited States
CityHonolulu
Period9/24/189/25/18

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Keywords

  • Backscattering coefficient
  • Bidirectional reflectance distribution function
  • Lidar
  • Quantum cascade laser

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