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Bogliolo, M. P.
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Bogliolo, M. P.
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- PublicationRestrictedInspecting MIVIS capability to retrieve chemical-mineralogical information: evaluation and analysis of VNIR-SWIR data acquired on a volcanic area(2004-09)
; ; ; ; ; ;Bogliolo, M. P.; stituto Superiore Prevenzione e Sicurezza sul Lavoro ;Teggi, S.; Università di Modena e Reggio Emilia ;Buongiorno, M. F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione CNT, Roma, Italia ;Pugnaghi, S.; Università di Modena e Reggio Emilia ;Corradini, S.; Università di Modena e Reggio Emilia; ; ; ; This work is a contribution to the assessment of MIVIS (Multispectral Infrared and Visible Imaging Spectrometer) airborne imaging spectrometer capability in applications of surface characterization. The focus is on the visible and near-infrared-short wave infrared (VNIR-SWIR) spectral region, using a dataset acquired in 1994 on Vulcano Island (Italy), to retrieve chemical mineralogical information on the altered deposits related to volcanic activity. The main processing steps include data quality evaluation in terms of signal-to-noise ratio, atmospheric and topographic corrections and spectral interpretation of the image. Estimation of surface reflectance is based on atmospheric modelling by MODTRAN3.5 and 6S radiative transfer codes. Representative MIVIS reflectance spectra of the main surface units are compared with spectra measured in the laboratory on field samples, and interpreted to characterize the mineralogy on the basis of their spectral features. A thematic map of the main alteration units is then produced by applying spectral mapping techniques to the surface reflectance image, using a set of channels selected on the basis of their data quality and image-derived end-member spectra.304 21 - PublicationOpen AccessSpectral emissivity and temperature maps of the Solfatara crater from DAIS hyperspectral images(2006-02)
; ; ; ; ;Merucci, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione CNT, Roma, Italia ;Bogliolo, M. P.; Istituto Superiore per la Prevenzione e la Sicurezza del Lavoro, Monteporzio Catone (RM), Italy ;Buongiorno, M. F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione CNT, Roma, Italia ;Teggi, S.; Università di Modena e Reggio Emilia, Modena, Italy; ; ; Quantitative maps of surface temperature and spectral emissivity have been retrieved on the Solfatara crater at Pozzuoli (Naples) from remote sensing hyperspectral data. The present study relies on thermal infrared images collected on July 27, 1997 by the DAIS hyperspectral sensor owned by the German aerospace center (DLR). The Emissivity Spectrum Normalization method was used to make temperature and emissivity estimates. Raw data were previously transformed in radiance and corrected for the atmospheric contributions using the MODTRAN radiative transfer code and the sensor response functions. During the DAIS flight a radiosonde was launched to collect the atmospheric profiles of pressure, temperature and humidity used as input to the code. Retrieved temperature values are in good agreement with temperature measurements performed in situ during the campaign. The spectral emissivity map was used to classify the image in different geo-mineralogical units with the Spectral Angle Mapper method. Areas of geologic interest were previously selected using a mask obtained from an NDVI image calculated with two channels of the visible (red) and the near infrared respectively.169 286 - PublicationRestrictedWill ASTER see the Etna SO2 plume?(2003)
; ; ; ; ; ;Corradini, S.; Università di Modena e Reggio Emilia ;Pugnaghi, S.; Università di Modena e Reggio Emilia ;Teggi, S.; Università di Modena e Reggio Emilia ;Buongiorno, M. F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione CNT, Roma, Italia ;Bogliolo, M. P.; Istituto Superiore per la Prevenzione e la Sicurezza sul Lavoro (ISPESL); ; ; ; The aim of this paper is to show the feasibility of evaluating the sulphur dioxide (SO2) flux emitted by Mt Etna volcano, using remotely sensed data of Advanced Spaceborne Thermal Emission and Reflection radiometer (ASTER) in the thermal infrared (TIR). ASTER is one of the instruments on board the first Earth Observation System (EOS) satellite launched on 18 December 1999. To simulate the ASTER data, Multispectral Infrared and Visible Imaging Spectrometer (MIVIS) images, acquired during the ‘Sicily ’97’ campaign, were used. The SO2 column abundance maps shown in this paper have been obtained by means of a simple algorithm based on the split-window technique. The parameters of the algorithm were computed using Moderate Resolution Atmospheric Radiance and Transmittance Model (MODTRAN) simulations performed with atmospheric profiles acquired during MIVIS flights. The mean SO2 flux on 12 and 16 June 1997, obtained using the ASTER simulated images, results in 42 and 33 kg s−1 respectively; these values are in good agreement with the results obtained by the inversion procedure used by Teggi et al. (1999) applied to the MIVIS data and with the Correlation Spectrometer (COSPEC) measurements performed during the campaign by other teams.325 26 - PublicationRestrictedEstimation of SO2 abundance in the eruption plume of Mt. Etna using two MIVIS thermal infrared channels: a case study from the Sicily-1997 Campaign(2002)
; ; ; ; ; ; ;Pugnaghi, S.; Università di Modena e Reggio Emilia ;Teggi, S.; Università di Modena e Reggio Emilia ;Corradini, S.; Università di Modena e Reggio Emilia ;Buongiorno, M. F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione CNT, Roma, Italia ;Merucci, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione CNT, Roma, Italia ;Bogliolo, M. P.; Istituto Superiore per la Prevenzione e la Sicurezza sul Lavoro (ISPESL); ; ; ; ; In this paper, an algorithm is developed based on the split-window technique, to estimate the SO2 abundance in the plume of Mt. Etna volcano using the multispectral infrared and visible imaging spectrometer (MIVIS). The MIVIS data were remotely sensed in the thermal infrared (TIR) during the Sicily-1997 Campaign. In this study, the MODTRAN 3.5 code has been used to simulate the radiance at the sensor; the radiative transfer model was input along with the data of radio-sounding performed simultaneously with the MIVIS flight using a mobile radio-theodolite. From the SO2 map, derived from the MIVIS image, the SO2 flux along the axis of the plume was computed knowing the wind speed at the plume altitude. The SO2 flux is variable along the plume axis. The average SO2 flux (about 45 kg s–1 on 12 June and about 30 kg s–1 on 16 June) emitted from the vents is compared with the correlation spectrometer (COSPEC) measurements carried out by other teams (from the ground and from a light aircraft flying under the plume) during the MIVIS flight. Finally, by means of this algorithm it should be easier, with respect to the previously described procedure to monitor the SO2 flux of a specific volcano such as Mt. Etna.343 24