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Your search keyword '"Giuppi, S."' showing total 2 results
Start Over Author "Giuppi, S." Topic law.invention
2 results on '"Giuppi, S."'

1. MARSIS data inversion approach: Preliminary results

Author

Raffaella Noschese, Tor Hagfors, Roberto Orosei, Marco Cartacci, Erling Nielsen, Dirk Plettemeier, W.T.K. Johnson, R. L. Huff, Giuliano Vannaroni, Alessandro Frigeri, Rolando L. Jordan, A. Masdea, J. J. Plaut, E. Zampolini, Elena Pettinelli, Costanzo Federico, Diego Calabrese, Stefano Giuppi, Daniela Biccari, Roberto Seu, A. Marini, O. Bombaci, Andrea Cicchetti, Ali Safaeinili, Peter Edenhofer, D. L. Kirchner, Enrico Flamini, D. A. Gurnett, Giovanni Picardi, P.T. Melacci, Lucia Marinangeli, F. Piccari, Iwan P. Williams, radar conference, Picardi, G., Biccari, D., Cartacci, M., Cicchetti, A., Giuppi, S., Marini, A., Masdea, A., Noschese, R., Piccari, F., Seu, R., Plaut, J. J., Johnson, W. T. K., Jordan, R. L., Safaeinili, A., Federico, C., Frigeri, A., Melacci, P. T., Orosei, R., Bombaci, O., Calabrese, D., Zampolini, E., Edenhofer, P., Plettemeier, D., Marinangeli, L., Pettinelli, Elena, Hagfors, T., Flamini, E., Vannaroni, G., Nielsen, E., Williams, I., Gurnett, D. A., Kirchner, D. L., and Huff, R. L.

Subjects
Inverse transform sampling, MARSIS, Inversion (meteorology), Mars Exploration Program, Geophysics, Exploration of Mars, law.invention, Depth sounding, law, Physics::Space Physics, Astrophysics::Earth and Planetary Astrophysics, Radar, Ionosphere, Geology, Remote sensing
Abstract

An approach to the inversion of the data available from the MARSIS (Mars Advanced Radar for Subsurface and Ionosphere Sounding) instrument on Mars Express is described. The data inversion gives an estimation of the materials composing the different detected interfaces, including the impurity (inclusion) of the first layer, if any, and its percentage, by the evaluation of the values of the permittivity that would generate the observed radio echoes. The data inversion method is based on the analysis of the surface to subsurface power ratio and the relative time delay as measured by MARSIS. The constraints, due to the known geological history of the surface, the local temperature and the thermal condition of the observed zones and the results of other instruments on Mars Express and other missions to Mars, have to be considered to improve the validity of the utilized models and the obtained results that are given in parametric way.

Published
2008

2. MARSIS Data Inversion Approach

Author

Costanzo Federico, Marco Cartacci, Daniela Biccari, Andrea Cicchetti, F. Piccari, Roberto Seu, P.T. Melacci, Giovanni Picardi, Enrico Flamini, Diego Calabrese, Elena Pettinelli, Roberto Orosei, E. Zampolini, Lucia Marinangeli, Raffaella Noschese, O. Bombaci, Stefano Giuppi, Alessandro Frigeri, A. Marini, A. Masdea, Picardi, G., Biccari, D., Cartacci, M., Cicchetti, A., Giuppi, S., Marini, A., Masdea, A., Noschese, R., Piccari, F., Seu, R., Bombaci, O., Calabrese, D., Zampolini, E., Pettinelli, Elena, Federico, C., Frigeri, A., Melacci, P. T., Orosei, R., Marinangeli, L., and Flamini, E.

Subjects
law, Martian surface, Mars Orbiter Laser Altimeter, Ground-penetrating radar, Surface roughness, Clutter, MARSIS, Mars Exploration Program, Radar, Geology, Remote sensing, law.invention
Abstract

In this paper we describe an inversion approach in order to analyze data from the MARSIS (Mars Advanced Radar for Subsurface and Ionosphere Sounding) instrument on Mars Express. The inversion process allows the dielectric constant of the subsurface material to be estimated provided the dielectric constant of the surface is known. In addition, if impurity are present, it is possible to estimate the dielectric constant of any inclusions as well as the percentage amount of material in the inclusions relative to the host material provided knowledge of the host material up to the depth where the interface has been detected is available. The data inversion method is based on the analysis of the surface to subsurface power ratio and the relative time delay as measured by MARSIS. The data inversion has been performed at several frequencies in order to estimate the frequency dependent parameters affecting the behavior of the radar echoes. It is necessary that the surface and subsurface interfaces have the same roughness in order to estimate the Subsurface Fresnel reflectivity. As a preliminary approach, only flat surface have been selected. MOLA (Mars Orbiter Laser Altimeter) has already provided detailed data on the visible Martian surface and a simulator, with a facet model, has been utilized to use MOLA data in order to verify the correct selection of the frames that will be used for the data inversion (absence of clutter echoes).

Published
2007

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