Remote sensing of atmospheric pollution by passive FTIR spectrometry

Andreas Beil; Rainer Daum; Roland Harig; Gerhard Matz

doi:10.1117/12.332663

15 December 1998 Remote sensing of atmospheric pollution by passive FTIR spectrometry

Andreas Beil, Rainer Daum, Roland Harig, Gerhard Matz

Proceedings Volume 3493, Spectroscopic Atmospheric Environmental Monitoring Techniques; (1998) https://doi.org/10.1117/12.332663
Event: Remote Sensing, 1998, Barcelona, Spain

Abstract

Passive remote sensing with a Fourier transform IR (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 anew 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 brightness temperature is computed. The temperature spectrum has a constant baseline for many natural materials that serve as the background in field measurements because their emittance is high and almost constant in the spectral range 800-1200 cm^-2. The influence of environmental and instrumental parameters on the sensitivity of the method are 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.

Citation Download Citation

Andreas Beil, Rainer Daum, Roland Harig, and Gerhard Matz "Remote sensing of atmospheric pollution by passive FTIR spectrometry", Proc. SPIE 3493, Spectroscopic Atmospheric Environmental Monitoring Techniques, (15 December 1998); https://doi.org/10.1117/12.332663

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available