Remote sensing of vegetation stress and soil contamination using CO2 laser reflectance ratios

Ram Mohan Narayanan, Mark T. Pflum

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

A tunable CO2 laser reflectance sensor operating in the 9-11 μm wavelength region of the electromagnetic spectrum was used to measure the mid-infrared active reflectance characteristics of stressed vegetation and contaminated soil. Measurements were performed at various wavelengths, incidence angles, and polarization combinations. The vegetation study was conducted by inducing freezing, chilling, drought, flooding, and heat stress on four different plant species showing varying leaf cover characteristics. The soil study was conducted by adding chemical contaminants, viz., antifreeze, used motor oil (containing gasoline), and unused motor oil to bare soil. Reflectance ratios, i.e., ratios of reflectance at different wavelengths, were investigated as to their relationships with different stresses and contaminations. It was determined that judiciously selected reflectance ratios could be used to identify stressed plants (although the type of stress could not always be identified), as well as the presence and the type of contamination in bare soil. This indicates the potential for CO2 laser sensors to monitor vegetation stress and soil contamination from standoff platforms.

Original languageEnglish (US)
Pages (from-to)1593-1617
Number of pages25
JournalInternational Journal of Infrared and Millimeter Waves
Volume20
Issue number8
DOIs
StatePublished - Jan 1 1999

Fingerprint

soil pollution
vegetation
remote sensing
Remote sensing
contamination
Contamination
soils
reflectance
Soils
Lasers
lasers
Wavelength
antifreezes
oils
wavelengths
Chilling
drought
Laser tuning
electromagnetic spectra
gasoline

All Science Journal Classification (ASJC) codes

  • Radiation
  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Condensed Matter Physics
  • Physics and Astronomy (miscellaneous)
  • Electrical and Electronic Engineering

Cite this

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abstract = "A tunable CO2 laser reflectance sensor operating in the 9-11 μm wavelength region of the electromagnetic spectrum was used to measure the mid-infrared active reflectance characteristics of stressed vegetation and contaminated soil. Measurements were performed at various wavelengths, incidence angles, and polarization combinations. The vegetation study was conducted by inducing freezing, chilling, drought, flooding, and heat stress on four different plant species showing varying leaf cover characteristics. The soil study was conducted by adding chemical contaminants, viz., antifreeze, used motor oil (containing gasoline), and unused motor oil to bare soil. Reflectance ratios, i.e., ratios of reflectance at different wavelengths, were investigated as to their relationships with different stresses and contaminations. It was determined that judiciously selected reflectance ratios could be used to identify stressed plants (although the type of stress could not always be identified), as well as the presence and the type of contamination in bare soil. This indicates the potential for CO2 laser sensors to monitor vegetation stress and soil contamination from standoff platforms.",
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Remote sensing of vegetation stress and soil contamination using CO2 laser reflectance ratios. / Narayanan, Ram Mohan; Pflum, Mark T.

In: International Journal of Infrared and Millimeter Waves, Vol. 20, No. 8, 01.01.1999, p. 1593-1617.

Research output: Contribution to journalArticle

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