Dr. Adriana Predoi-Cross Profile

Dr. Adriana Predoi-Cross

Professor at Univ of Lethbridge

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Proceedings Article | 20 October 1999 Paper

Intercalibration of medium-resolution grating spectrometers for MOPITT validation

Boyd Tolton, Leonid Yurganov, Eamonn McKernan, Adriana Predoi-Cross, Evgeny Grechko

Proceedings Volume 3756, (1999) https://doi.org/10.1117/12.366408

KEYWORDS: Carbon monoxide, Spectrometers, Fourier transforms, Molecules, Atmospheric physics, Calibration, Satellites, Infrared radiation, Earth's atmosphere, Radiometry

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The validation of MOPITT measurements of atmospheric carbon monoxide (CO) and methane (CH₄) will require independent, simultaneous, co-located measurements from ground- and aeroplane-based instruments. Recently, a program of MOPITT validation measurements in Russia and Canada has been proposed. This program will use three (nearly) identical Russian-made medium-resolution grating spectrometers (known as Sarcophagus) capable of measuring the atmospheric column concentration of CO and CH₄. Two of these instruments are located in Russia, and one in Canada. The similarity of these instruments provides the opportunity of acquiring a highly correlated validation dataset from diverse locations around the globe. As part of this program, we are proposing to inter- calibrate these instruments using a set of standard gas cells. These cells will be regularly shipped between the instruments for calibration and inter-comparison purposes. These measurements will be made relative to measurements from a very high-resolution Difference Frequency Laser Spectrometer (DFLS) located at the University of Toronto. In this paper we present the results of a test of this inter-calibration experiment using a single CO gas cell and involving Sarcophagus, a high resolution Fourier Transform Spectrometer (FTS) and the University of Toronto DFLS.

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