Finite field of view effects on inversion of limb thermal emission observations

Abbas, M. M.; Guo, Jing; Conrath, B. J.; Kunde, V. G.; Maguire, W. C.

doi:10.1029/jd090id02p03903

J. Geophys. Res.

1985

DOI: 10.1029/jd090id02p03903

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Finite field of view effects on inversion of limb thermal emission observations

M. M. Abbas

Jing Guo

B. J. Conrath³

et al.

Abstract: The effects of finite field of view of observing instruments on the inversion of infrared thermal emission measurements are examined. Analytical and numerical techniques are discussed for calculation of the weighting functions and for retrieval of temperature and constituent distributions from thermal emission observations with a finite field of view. Calculations and plots of the weighting functions with various instrumental fields of view are presented. Results for retrieval of temperature and constituent pr… Show more

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Cited by 7 publications

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“…The effect of a finite field of view of the observing instrument has been ignored in the radiative transfer calculations. This effect broadens the weighting functions and reduces the vertical spatial resolution; its influence on retrieval of gas concentrations is relatively small and can be neglected[Abbas et al, 1985b].…”

mentioning

confidence: 99%

Stratospheric O₃, H₂O, and HDO distributions from balloon‐based far‐infrared observations

Abbas

Guo

Carli³

et al. 1987

J. Geophys. Res.

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Limb thermal emission spectra of the earth's stratosphere in the far‐infrared spectral region, obtained as part of the Balloon Intercomparison Campaign (BIC), have been analyzed for retrieval of trace constituent distributions. The observations analyzed here were made with a balloon‐borne high‐resolution Michelson interferometer operating in the 20–100 cm−1 region, with an unapodized spectral resolution of 0.0033 cm−1. In this paper the vertical profiles of O3, H2O, and HDO retrieved from the observed spectra are presented and compared with the results from other BIC experiments. The retrieved profiles are found to be in good agreement with other measurements. The measurement of the HDO profile provides information about the sources of stratospheric water vapor. The variation of the D/H ratio of water vapor is derived from an analysis of HDO and H2O lines observed in the far‐infrared spectra and is compared with the available measurements in the literature.

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mentioning

confidence: 99%

Stratospheric O₃, H₂O, and HDO distributions from balloon‐based far‐infrared observations

Abbas

Guo

Carli³

et al. 1987

J. Geophys. Res.

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Sensitivity of trace gas abundances retrievals from infrared limb emission spectra to simplifying approximations in radiative transfer modelling

Stiller

Clarmann

Funke

et al. 2002

Journal of Quantitative Spectroscopy and Radiative Transfer

158

103

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Retrieval of stratospheric O₃, HNO₃ and ClONO₂ profiles from 1992 MIPAS‐B limb emission spectra: Method, results, and error analysis

Clarmann¹,

Fischer²,

Friedl-Vallon³

et al. 1993

J. Geophys. Res.

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Within the framework of the European Arctic Stratospheric Ozone Experiment, two flights of the balloon-borne MIPAS-B limb emission spectrometer were performed in the Arctic stratosphere from Kiruna, northern Sweden. During the early hours of January 13 and the night from March 14 to March 15, 1992, several limb sequences of infrared spectra were recorded which have permitted the retrieval of vertical profiles of many trace gases relevant for ozone chemistry. In the present work, the retrieval strategy, error estimation strategy, and resulting profiles of 03, HNO3, and C1ONO2 are reported. The data analysis procedure, consisting of data preprocessing including calibration, analysis of auxiliary data including temperature profiles and line of sight determination, and retrieval of trace gas profiles, is described in detail. The last is carried out by means of multiparameter nonlinear least squares fitting in combination with onion peeling. An astonishingly high C1ONO2 amount of 2.6 ppb by volume at about 19-km altitude was inferred for the March flight. A rigorous error analysis, which takes into account systematic and random errors and their often nonlinear impact on the results, proves the significance of the retrieved trace gas profiles. mary of previous campaigns are published elsewhere [Oelhaf et al., 1991; Friedl-Vallon et al., 1992]. Two flights were performed by the Centre National d'Etudes Spatiales in cooperation with the Swedish Space Corporation from Esrange near Kiruna, northern Sweden (68øN, 21øE) within the framework of the European Arctic Stratospheric Ozone Experiment (EASOE) in 1992. For details of the 1992 campaign and a discussion of the results in the meteorological and scientific context of EASOE, see Oelhaf et al. [1993].The first flight took place in the early hours of January 13. The balloon remained nearly stationary above the Gulf of Bothnia, inside the polar vortex. From an average floating altitude of 31 km, limb emission spectra were recorded at elevation angles from -4.7 ø to + 2.6 ø, corresponding to tangent altitudes down to 9 km. Spectra of tangent altitudes of 13 km and higher have been used for trace gas retrievals so far. Because of a malfunction of the azimuth stabilization system, spectra of many different azimuth directions were recorded. They were classified into three main azimuth groups (northwest, northeast, southeast) to be analyzed separately.The second flight, on March 14,/15, was characterized by a trajectory north of the edge of the polar vortex and ended with a crash landing near Nikel, northwest of Murmansk, Russia. From an average floating altitude of about 33 kin, two complete sequences of spectra were recorded. Looking northeast, spectra were measured under elevation angles down to -5.1 ø, corresponding to a lowest tangent altitude of 6 km. Spectra of tangent altitudes of 11.3 km and higher have been used for trace gas retrievals so far. Looking south, spectra related to air of the vortex edge region were recorded at elevation angles from -4.9 ø to -1.5 ø, corres...

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Finite field of view effects on inversion of limb thermal emission observations

Cited by 7 publications

References 7 publications

Stratospheric O₃, H₂O, and HDO distributions from balloon‐based far‐infrared observations

Stratospheric O₃, H₂O, and HDO distributions from balloon‐based far‐infrared observations

Sensitivity of trace gas abundances retrievals from infrared limb emission spectra to simplifying approximations in radiative transfer modelling

Retrieval of stratospheric O₃, HNO₃ and ClONO₂ profiles from 1992 MIPAS‐B limb emission spectra: Method, results, and error analysis

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Finite field of view effects on inversion of limb thermal emission observations

Cited by 7 publications

References 7 publications

Stratospheric O3, H2O, and HDO distributions from balloon‐based far‐infrared observations

Stratospheric O3, H2O, and HDO distributions from balloon‐based far‐infrared observations

Sensitivity of trace gas abundances retrievals from infrared limb emission spectra to simplifying approximations in radiative transfer modelling

Retrieval of stratospheric O3, HNO3 and ClONO2 profiles from 1992 MIPAS‐B limb emission spectra: Method, results, and error analysis

Contact Info

Product

Resources

About

Stratospheric O₃, H₂O, and HDO distributions from balloon‐based far‐infrared observations

Stratospheric O₃, H₂O, and HDO distributions from balloon‐based far‐infrared observations

Retrieval of stratospheric O₃, HNO₃ and ClONO₂ profiles from 1992 MIPAS‐B limb emission spectra: Method, results, and error analysis