Title :
1D-FDTD Characterization of Ionosphere Influence on Ground Penetrating Radar Data Inversion
Author :
Restano, Marco ; Picardi, Giovanni ; Seu, Roberto
Author_Institution :
Dipt. di Ing. dell´Inf., Sapienza Univ. di Roma, Rome, Italy
Abstract :
A finite-difference time-domain (FDTD) simulator is employed to evaluate distortions induced by the ionosphere on chirp signals transmitted by orbiting ground penetrating radars like the Mars advanced radar for subsurface and ionosphere sounding (MARSIS) and the shallow radar (SHARAD). The main goal is to support the data inversion process, i.e., the estimation of the permittivity of subsurface layers. Also proposed is an approach to study the influence of the ionosphere on chirp signals for present and future missions. Since data inversion relies on both crust attenuation estimation and rough geometries compensation, procedures that could be both strongly influenced by the ionosphere, several ionosphere compensation schemes are compared and their impact on data inversion is discussed.
Keywords :
Mars; finite difference time-domain analysis; ground penetrating radar; ionosphere; 1D-FDTD characterization; FDTD simulator; MARSIS; Mars; SHARAD; chirp signals; crust attenuation estimation; data inversion; finite-difference time-domain simulator; ground penetrating radar; ionosphere influence; ionosphere sounding; permittivity; rough geometries compensation; shallow radar; subsurface layers; subsurface sounding; Finite difference methods; Ground penetrating radar; Ionosphere; Mathematical model; Plasmas; Time-domain analysis; Finite-difference time-domain (FDTD) methods; Mars; ground penetrating radars; ionosphere electromagnetic propagation; radar signal analysis;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2014.2299825
