Remote Fourier Transform Infrared Air Pollution Studies

Herget, William F.; Brasher, James D.

doi:10.1117/12.7972551

Cited by 54 publications

(19 citation statements)

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“…Emission spectroscopy has been used successfully on exhaust from jet engines and plumes from coal-burning power plants. 3 Because many stacks, soils, waters, and workplaces are not warm enough to produce emission spectra and yet are sources of VOCs, absorption spectra have been increasingly used over the past 40 years. Early spectrometers were stationary and used closed cells, which limits their application.…”

Section: Theorymentioning

confidence: 99%

Quantitative open-path FTIR with the use of isotopic standards

Ingling

Isenhour

1999

Field Analyt. Chem. Technol.

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Section: Theorymentioning

confidence: 99%

Quantitative open-path FTIR with the use of isotopic standards

Ingling

Isenhour

1999

Field Analyt. Chem. Technol.

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“…The technique of Fourier transform-infrared (FTIR) remote sensing is increasingly used for the detection and identification of gas phase pollutants in open environments [1][2][3][4][5][6][7] . Compared to the traditional point sampling detection methods, remote sensing by FTIR spectroscopy has several advantages:…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, this measurement technique allows mobile application (vehicles 1 , ships 19 , and aircrafts…”

Section: Conclusion and Summarymentioning

confidence: 99%

“…The active open path measurement technique is quite similar to the classical setup of a laboratory FTIR spectrometer and is often used for environmental air pollution studies, whereas passive FTIR remote sensing is not as well known in the community of analytic scientists. Due to the high sensitivity and mobility of modern FTIR spectrometers, the number of applications in field monitoring 1,2,5,6 and process control 9,10 is increasing.…”

Section: Introductionmentioning

confidence: 99%

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<title>Remote sensing of atmospheric pollution by passive FTIR spectrometry</title>

et al. 1998

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Passive remote sensing with a Fourier transform infrared (FTIR) spectrometer allows the detection and identification of pollutant clouds in the atmosphere. In this work, the measurement technique and a data analysis method that does not require a previously measured background spectrum are described. Recent experimental results obtained with a new high sensitive FTIR remote sensor are presented.Many situations do not allow the measurement of a background spectrum prior to the measurement of pollutants in order to perform background removal. After a radiometric calibration of the FTIR spectrometer with IR reference sources the spectral radiance of the environment can be measured. With the inverse function of Planck's radiation law, the (spectrally resolved) brightness temperature is computed. The temperature spectrum has a constant baseline for many natural materials that serve as the background in field measurements (forest etc.) because their emittance ε(ν) is high and almost constant in the spectral range 800-1200 cm -1. The influence of environmental and instrumental parameters on the sensitivity of the method is discussed. Experimental results are presented to illustrate the enhancement of the signal to noise ratio that can be achieved by the alignment of the spectrometer to backgrounds with a high temperature difference to the environment.

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“…This technique is especially useful for the exhaust of aircraft engines, 71 and has also been demonstrated for stack-gas emissions, 44 ' 83 ' 84 and the study of flames or furnaces. 85 While this approach has the advantage of not requiring a radiation source or retroreflector behind the target region, it suffers two disadvantages: the temperatures of the target region and sky background may not be known; and the temperature dependence of the IR emission by the various species may not have been studied.…”

Section: Emissionmentioning

confidence: 99%