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

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

Atmospheric Composition Remote Sensing and Prediction

National Center for Atmospheric Research

Research output: Abstract › Paper › 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
Pages	1094-1096
Number of pages	3
State	Published - 2002
Event	2002 IEEE International Geoscience and Remote Sensing Symposium (IGARSS 2002) - Toronto, Ont., Canada Duration: Jun 24 2002 → Jun 28 2002

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
Methane
MOPITT

Cite this

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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, Methane, MOPITT",

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

year = "2002",

language = "English",

pages = "1094--1096",

note = "2002 IEEE International Geoscience and Remote Sensing Symposium (IGARSS 2002) ; Conference date: 24-06-2002 Through 28-06-2002",

}

TY - CONF

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.

AU - Gille, J. C.

AU - Edwards, D. P.

AU - Ziskin, D.

PY - 2002

Y1 - 2002

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

KW - Methane

KW - MOPITT

UR - https://www.scopus.com/pages/publications/0036030369

M3 - Paper

AN - SCOPUS:0036030369

SP - 1094

EP - 1096

T2 - 2002 IEEE International Geoscience and Remote Sensing Symposium (IGARSS 2002)

Y2 - 24 June 2002 through 28 June 2002

ER -

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

Abstract

Conference

Keywords

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