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Geophysics Centre of Évora - University of Évora (CGE-UE), Évora, Portugal
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- PublicationOpen AccessA multi-input UV-VIS airborne GASCOD/A4r spectroradiometer for the validation of satellite remote sensing measurements(2006-02)
; ; ; ; ; ; ; ;Istituto di Scienze dell’Atmosfera e del Clima (ISAC), CNR, Bologna, Italy ;Solar-Terrestrial Influences Laboratory (STIL), Bulgarian Academy of Science, Stara Zagora, Bulgaria ;Kostadinov, I.; Istituto di Scienze dell’Atmosfera e del Clima (ISAC), CNR, Bologna, Italy ;Giovanelli, G.; Istituto di Scienze dell’Atmosfera e del Clima (ISAC), CNR, Bologna, Italy ;Bortoli, D.; Istituto di Scienze dell’Atmosfera e del Clima (ISAC), CNR, Bologna, Italy ;Petritoli, A.; Istituto di Scienze dell’Atmosfera e del Clima (ISAC), CNR, Bologna, Italy ;Ravegnani, F.; Istituto di Scienze dell’Atmosfera e del Clima (ISAC), CNR, Bologna, Italy ;Pace, G.; Università degli Studi di Roma «La Sapienza», Roma, Italy ;Palazzi, E.; Istituto di Scienze dell’Atmosfera e del Clima (ISAC), CNR, Bologna, Italy; ; ; ; ; ; The present paper describes a UV-VIS spectroradiometer named GASCOD/A4r developed at ISAC-CNR for remote sensing measurements aboard stratospheric M55-Geophysica aircraft, flying up to 21 km. Obtained experimental data are used for retrieving of NO2, O3 and of other minor gases atmospheric content, applying the DOAS (Differential Optical Absorption Spectroscopy) method. UV actinic flux and J(NO2) are also derived. All these parameters are used for satellite data validation tasks. The specific results obtained during dedicated aircraft missions in different geographical areas have already been utilized for ENVISAT validation.130 341 - PublicationOpen AccessPerspectives of 2D and 3D mapping of atmospheric pollutants over urban areas by means of airborne DOAS spectrometers(2006-02)
; ; ; ; ; ; ; ; ; ; ;Giovanelli, G.; Istituto di Scienze dell’Atmosfera e del Clima (ISAC), CNR, Bologna, Italy ;Palazzi, E.; Istituto di Scienze dell’Atmosfera e del Clima (ISAC), CNR, Bologna, Italy ;Petritoli, A.; Istituto di Scienze dell’Atmosfera e del Clima (ISAC), CNR, Bologna, Italy ;Bortoli, D.; Geophysics Centre of Évora - University of Évora (CGE-UE), Évora, Portugal ;Kostadinov, I.; Solar-Terrestrial Influences Laboratory (STIL), Bulgarian Academy of Science, Stara Zagora, Bulgaria ;Margelli, F.; Istituto di Scienze dell’Atmosfera e del Clima (ISAC), CNR, Bologna, Italy ;Pagnutti, S.; Istituto di Scienze dell’Atmosfera e del Clima (ISAC), CNR, Bologna, Italy ;Premuda, M.; ENEA, Divisione Fisica Applicata, Centro Ricerche Bologna, Italy ;Ravegnani, F.; Istituto di Scienze dell’Atmosfera e del Clima (ISAC), CNR, Bologna, Italy ;Trivellone, G.; Istituto di Scienze dell’Atmosfera e del Clima (ISAC), CNR, Bologna, Italy; ; ; ; ; ; ; ; ; tants, offering numerous advantages over conventional networks of in situ analysers. We propose some innovative solutions in the field of DOAS (Differential Optical Absorption Spectroscopy) remote systems, utilizing diffuse solar light as the radiation source. We examine the numerous potentialities of minor gas slant column calculations, applying the «off-axis» methodology for collecting the diffuse solar radiation. One of these particular approaches, using measurements along horizontal paths, has already been tested with the spectrometer installed on board the Geophysica aircraft during stratospheric flights up to altitudes of 20 km. The theoretical basis of these new measurement techniques using DOAS remote sensing systems are delineated to assess whether low altitude flights can provide 2D and 3D pollution tomography over metropolitan areas. The 2D or 3D trace gas total column mapping could be used to investigate: i) transport and dispersion phenomena of air pollution, ii) photochemical process rates, iii) gas plume tomography, iv) minor gas vertical profiles into the Planetary Boundary Layer and v) minor gas flux divergence over a large area.167 308