Test of far-infrared atmospheric spectroscopy using wide-band balloon-borne measurements of the upwelling radiance

Bianchini, Giovanni; Carli, B.; Cortesi, Ugo; Bianco, Samuele Del; Gai, Marco; Palchetti, Luca

doi:10.1016/j.jqsrt.2007.11.010

Cited by 22 publications

(15 citation statements)

References 21 publications

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“…Operational products include, along with vertical profiles of temperature and water vapor and surface temperature and emissivity, total and partial columns of ozone and column values of CH 4 , CO, CO 2 and N 2 O. Calculations of IASI radiances and retrieval of ozone VMR profiles used in this work are based on a version of the MARC (Millimetre-wave Atmospheric-Retrieval Code) retrieval code recently upgraded for the analysis of the REFIR (Radiation Explorer in the Far InfraRed) measurements Bianchini et al, 2008) and subsequently optimized, in the frame of a project of the European Spatial Agency (ESA), for IASI measurements. IASI observations, corresponding to a single IFOV measured at nadir (12×12 km ground pixel from an altitude of approximately 817 km), are simulated using the forward model and adding a Gaussian random noise based on the nominal values of IASI noise equivalent spectral radiance.…”

Section: Simulation Of the Iasi Measurementmentioning

confidence: 99%

IASI-METOP and MIPAS-ENVISAT data fusion

et al. 2010

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Abstract. The combination of data obtained with different sensors (data fusion) is a powerful technique that can provide target products of the best quality in terms of precision and accuracy, as well as spatial and temporal coverage and resolution. In this paper the results are presented of the data fusion of measurements of ozone vertical profile performed by two space-borne interferometers (IASI on METOP and MIPAS on ENVISAT) using the new measurement-spacesolution method. With this method both the loss of information due to interpolation and the propagation of possible biases (caused by a priori information) are avoided. The data fusion products are characterized by means of retrieval errors, information gain, averaging kernels and number of degrees of freedom. The analysis is performed both on simulated and real measurements and the results demonstrate and quantify the improvement of data fusion products with respect to measurements of a single instrument.

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Section: Simulation Of the Iasi Measurementmentioning

confidence: 99%

IASI-METOP and MIPAS-ENVISAT data fusion

et al. 2010

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“…It was designed as a global fit (Carlotti, 1988), multi-target (Dinelli et al, 2004) retrieval and it uses the optimal estimation (OE) approach along with the Levenberg-Marquardt algorithm (Rodgers, 2000). A detailed description of the main features of the code is provided in Carli et al (2007) and more details on the parametrization of the atmosphere, on the atmospheric line shape, as well as on the spectroscopic models implemented into MARC can be found in Bianchini et al (2008). A description of its use for the analysis of real data can be found in Dinelli et al (2009).…”

Section: Inversion Of Marschals Limb Radiancesmentioning

confidence: 99%

Synergy between middle infrared and millimeter-wave limb sounding of atmospheric temperature and minor constituents

et al. 2016

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Abstract. Synergistic exploitation of redundant and complementary information from independent observations of the same target remains a major issue in atmospheric remote sounding and increasing attention is devoted to investigate optimized or innovative methods for the combination of two or more measured data sets. This paper focuses on the synergy between middle infrared and millimeterwave limb sounding measurements of atmospheric composition and temperature and reports the results of a study conducted as part of the preparatory activities of the PRE-MIER (Process Exploration through Measurements of Infrared and millimeter-wave Emitted Radiation) mission candidate to the Core Missions of the European Space Agency (ESA) Earth Explorer 7. The activity was based on data acquired by the MIPAS-STR (Michelson Interferometer for Passive Atmospheric Sounding -STRatospheric aircraft) and MARSCHALS (Millimetre-wave Airborne Receivers for Spectroscopic CHaracterisation in Atmospheric Limb Sounding) instruments on-board the high-altitude research aircraft M-55 Geophysica during the flight of the PremierEx (PREMIER Experiment) campaign on 10 March 2010 from Kiruna, Sweden, for observation of the Arctic upper troposphere and lower stratosphere. The cloud coverage observed along the flight provided representative test cases to evaluate the synergy in three different scenarios: low clouds in the first part, no clouds in the central part and high tropospheric clouds at the end. The calculation of synergistic profiles of four atmospheric targets (i.e., O 3 , HNO 3 , H 2 O and temperature) was performed using a posteriori combination of individual retrieved profiles, i.e., Level 2 (L2) data rather than simultaneous inversion of observed radiances, i.e., Level 1 (L1) data. An innovative method of data fusion, based on the Measurement Space Solution (MSS) was applied along with the standard approach of inversion of MARSCHALS spectral radiances using MIPAS-STR retrieval products as a priori information (L1 + L2 method). A quantitative estimate and cross-check of the results of MSS data fusion and (L1 + L2) method was achieved based on a specific set of quantifiers including the total retrieval error, the number of degrees of freedom, the relative information distribution and the synergy factor.

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“…A detailed description of the main features of the code is provided in Carli et al (2007) and a description of its use for the analysis of real data can be found in Dinelli et al (2009). A description of the parametrization of the atmosphere and of the atmospheric line shape used into the MARC code can be found in Bianchini et al (2008).…”

Section: Retrieval Codementioning

confidence: 99%

Measurement of the Arctic UTLS composition in presence of clouds using millimetre-wave heterodyne spectroscopy

et al. 2013

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Abstract. MARSCHALS (Millimetre-wave Airborne Receivers for Spectroscopic CHaracterisation in AtmosphericLimb Sounding) is a limb viewing instrument working in the millimetre and sub-millimetre spectral regions (from 294 to 349 GHz). The scientific rationale of MARSCHALS is the study of the Upper Troposphere and Lower Stratosphere region. In March 2010 MARSCHALS was deployed on-board the M-55 Geophysica stratospheric aircraft during the PRE-MIER(PRocess Exploration through Measurements of Infrared and millimetre-wave Emitted Radiation)-Ex field campaign. From the campaign base at Kiruna, Sweden, a research flight to investigate the Arctic atmosphere was conducted. For the first time the instrument fully exploited the three spectral bands. In this paper, we present results of the analysis of MARSCHALS measurements acquired during the PREMIER-Ex flight as processed by the Millimetre-wave Atmospheric Retrieval Code. For the second time after the SCOUT-O3 flight in 2005, MARSCHALS measured vertical distributions of temperature, water vapour, ozone and nitric acid over an altitude range of 4 to 24 km. In addition, vertical profiles of carbon monoxide and nitrous oxide were obtained for the first time. The measurements were performed in clear sky conditions and in presence of low and high altitude clouds (that were able to obscure measurements in the middle infrared spectroscopic region) and some information about thick clouds were extracted from the data. The capabilities to derive information on upper tropospheric and lower stratospheric vertical profiles of temperature and minor constituents from millimetre-wave limb sounding observations in the northern polar region are presented and discussed for each of the individual targets. The results of MARSCHALS data analysis contributed to demonstrate the scientific relevance and technical feasibility of millimetre-wave limbsounding of the UTLS proposed for the ESA Earth Explorer 7 candidate Core Mission PREMIER. PREMIER was not selected at the end of the Earth Explorer 7 evaluation process, but it is still being considered for future launch opportunities.

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Test of far-infrared atmospheric spectroscopy using wide-band balloon-borne measurements of the upwelling radiance

Cited by 22 publications

References 21 publications

IASI-METOP and MIPAS-ENVISAT data fusion

IASI-METOP and MIPAS-ENVISAT data fusion

Synergy between middle infrared and millimeter-wave limb sounding of atmospheric temperature and minor constituents

Measurement of the Arctic UTLS composition in presence of clouds using millimetre-wave heterodyne spectroscopy

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