Influence of surface reflectivity variability on MOPITT 2.2-2.3 μm channel radiances and the retrieval of CO and CH4

G. L. Francis; J. C. Gille; D. P. Edwards; D. Ziskin

Influence of surface reflectivity variability on MOPITT 2.2-2.3 μm channel radiances and the retrieval of CO and CH₄

National Center for Atmospheric Research

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

3 Scopus citations

Abstract

The MOPITT (Measurement of Pollution in the Troposphere) instrument uses gas-correlation spectroscopy to retrieve the tropospheric profile of CO and the total column of CO and CH₄. The instrument's 2.2-2.3 μm channel signals can be used to determine the CH₄ and CO columns. At these wavelengths, surface effects are important since the channel radiances are determined by reflected solar radiation. Small changes in scene during data acquisition for a given pixel can introduce important variations in surface reflectivity, even when averaged over the instrument field-of-view. These variations must be carefully accounted for to ensure a quality column retrieval. MOPITT simulations based on reflectivity measurements from the MODIS Airborne Simulator are used to construct examples illustrating these effects, along with a method for their mitigation.

Original language	English
Title of host publication	2002 IEEE International Geoscience and Remote Sensing Symposium, 24th Canadian Symposium on Remote Sensing - Proceedings
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	1094-1096
Number of pages	3
ISBN (Print)	078037536X
State	Published - 2002
Externally published	Yes
Event	2002 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2002 - Toronto, Ont., Canada Duration: Jun 24 2002 → Jun 28 2002

Publication series

Name	International Geoscience and Remote Sensing Symposium (IGARSS)
Volume	2
ISSN (Print)	2153-6996
ISSN (Electronic)	2153-7003

Conference

Conference	2002 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2002
Country/Territory	Canada
City	Toronto, Ont.
Period	06/24/02 → 06/28/02

Keywords

Carbon monoxide
Correlation spectroscopy
Forward modeling
MOPITT
Methane

Cite this

Francis, G. L., Gille, J. C., Edwards, D. P., & Ziskin, D. (2002). Influence of surface reflectivity variability on MOPITT 2.2-2.3 μm channel radiances and the retrieval of CO and CH₄. In 2002 IEEE International Geoscience and Remote Sensing Symposium, 24th Canadian Symposium on Remote Sensing - Proceedings (pp. 1094-1096). (International Geoscience and Remote Sensing Symposium (IGARSS); Vol. 2). Institute of Electrical and Electronics Engineers Inc..

Francis, G. L. ; Gille, J. C. ; Edwards, D. P. et al. / Influence of surface reflectivity variability on MOPITT 2.2-2.3 μm channel radiances and the retrieval of CO and CH₄. 2002 IEEE International Geoscience and Remote Sensing Symposium, 24th Canadian Symposium on Remote Sensing - Proceedings. Institute of Electrical and Electronics Engineers Inc., 2002. pp. 1094-1096 (International Geoscience and Remote Sensing Symposium (IGARSS)).

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title = "Influence of surface reflectivity variability on MOPITT 2.2-2.3 μm channel radiances and the retrieval of CO and CH4",

abstract = "The MOPITT (Measurement of Pollution in the Troposphere) instrument uses gas-correlation spectroscopy to retrieve the tropospheric profile of CO and the total column of CO and CH4. The instrument's 2.2-2.3 μm channel signals can be used to determine the CH4 and CO columns. At these wavelengths, surface effects are important since the channel radiances are determined by reflected solar radiation. Small changes in scene during data acquisition for a given pixel can introduce important variations in surface reflectivity, even when averaged over the instrument field-of-view. These variations must be carefully accounted for to ensure a quality column retrieval. MOPITT simulations based on reflectivity measurements from the MODIS Airborne Simulator are used to construct examples illustrating these effects, along with a method for their mitigation.",

keywords = "Carbon monoxide, Correlation spectroscopy, Forward modeling, MOPITT, Methane",

author = "Francis, \{G. L.\} and Gille, \{J. C.\} and Edwards, \{D. P.\} and D. Ziskin",

year = "2002",

language = "English",

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series = "International Geoscience and Remote Sensing Symposium (IGARSS)",

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booktitle = "2002 IEEE International Geoscience and Remote Sensing Symposium, 24th Canadian Symposium on Remote Sensing - Proceedings",

address = "United States",

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Francis, GL, Gille, JC, Edwards, DP & Ziskin, D 2002, Influence of surface reflectivity variability on MOPITT 2.2-2.3 μm channel radiances and the retrieval of CO and CH₄. in 2002 IEEE International Geoscience and Remote Sensing Symposium, 24th Canadian Symposium on Remote Sensing - Proceedings. International Geoscience and Remote Sensing Symposium (IGARSS), vol. 2, Institute of Electrical and Electronics Engineers Inc., pp. 1094-1096, 2002 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2002, Toronto, Ont., Canada, 06/24/02.

Influence of surface reflectivity variability on MOPITT 2.2-2.3 μm channel radiances and the retrieval of CO and CH₄. / Francis, G. L.; Gille, J. C.; Edwards, D. P. et al.
2002 IEEE International Geoscience and Remote Sensing Symposium, 24th Canadian Symposium on Remote Sensing - Proceedings. Institute of Electrical and Electronics Engineers Inc., 2002. p. 1094-1096 (International Geoscience and Remote Sensing Symposium (IGARSS); Vol. 2).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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T1 - Influence of surface reflectivity variability on MOPITT 2.2-2.3 μm channel radiances and the retrieval of CO and CH4

AU - Francis, G. L.

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AU - Edwards, D. P.

AU - Ziskin, D.

PY - 2002

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N2 - The MOPITT (Measurement of Pollution in the Troposphere) instrument uses gas-correlation spectroscopy to retrieve the tropospheric profile of CO and the total column of CO and CH4. The instrument's 2.2-2.3 μm channel signals can be used to determine the CH4 and CO columns. At these wavelengths, surface effects are important since the channel radiances are determined by reflected solar radiation. Small changes in scene during data acquisition for a given pixel can introduce important variations in surface reflectivity, even when averaged over the instrument field-of-view. These variations must be carefully accounted for to ensure a quality column retrieval. MOPITT simulations based on reflectivity measurements from the MODIS Airborne Simulator are used to construct examples illustrating these effects, along with a method for their mitigation.

AB - The MOPITT (Measurement of Pollution in the Troposphere) instrument uses gas-correlation spectroscopy to retrieve the tropospheric profile of CO and the total column of CO and CH4. The instrument's 2.2-2.3 μm channel signals can be used to determine the CH4 and CO columns. At these wavelengths, surface effects are important since the channel radiances are determined by reflected solar radiation. Small changes in scene during data acquisition for a given pixel can introduce important variations in surface reflectivity, even when averaged over the instrument field-of-view. These variations must be carefully accounted for to ensure a quality column retrieval. MOPITT simulations based on reflectivity measurements from the MODIS Airborne Simulator are used to construct examples illustrating these effects, along with a method for their mitigation.

KW - Carbon monoxide

KW - Correlation spectroscopy

KW - Forward modeling

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KW - Methane

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BT - 2002 IEEE International Geoscience and Remote Sensing Symposium, 24th Canadian Symposium on Remote Sensing - Proceedings

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Francis GL, Gille JC, Edwards DP , Ziskin D. Influence of surface reflectivity variability on MOPITT 2.2-2.3 μm channel radiances and the retrieval of CO and CH₄. In 2002 IEEE International Geoscience and Remote Sensing Symposium, 24th Canadian Symposium on Remote Sensing - Proceedings. Institute of Electrical and Electronics Engineers Inc. 2002. p. 1094-1096. (International Geoscience and Remote Sensing Symposium (IGARSS)).