Supporting Information for
The Bathymetry of a Titan sea
Geophysical Research Letters
Marco Mastrogiuseppe1, Valerio Poggiali1, Alexander Hayes2, Ralph Lorenz3, Jonathan Lunine2,
Giovanni Picardi1, Roberto Seu1, Enrico Flamini4, Giuseppe Mitri5, Claudia Notarnicola6, Philippe
Paillou7, Howard Zebker8.
1
Dipartimento di Ingegneria dell'Informazione, Elettronica e Telecomunicazioni, Università La
Sapienza, via Eudossiana 18, 00184 Rome, Italy.
2
Center for Radiophysics and Space Research, Cornell University, Ithaca NY 14853 USA.
3
Space Department, Johns Hopkins University Applied Physics Lab, Laurel, Maryland 20723-6099,
USA.
4
Agenzia Spaziale Italiana ,00133 Roma, Italy.
5
Istituto di Astrofisica e Planetologia Spaziali, INAF-IAPS, Via del Fosso del Cavaliere 100 , 00133
Roma, Italy.
6
EURAC, Institute for Applied Remote Sensing, Viale Druso 1, Bolzano, Italy.
7
University Bordeaux 1, UMR 5804 CNRS, 2 rue de l’Observatorie, 33270 Floirac, France.
8
Departments of Geophysics and Electrical Engineering, Stanford University, Stanford, CA 943052215 USA.
We analyzed T91 Cassini RADAR altimeter echoes reflected from the bottom of Ligeia Mare in
order to derive bathymetry and loss tangent of the liquid hydrocarbons filling the basin. The
bathymetry was obtained by means of super resolution techniques (MEM method via Burg
algorithm). The loss tangent was estimated using nominal range resolution and incoherent data
processed (13 modulus squared radar echoes average within each burst) in order to improve the
radiometric resolution and thus the accuracy on the radar parameters estimation.
The Supporting Information file consists of text and figures. The section heads for its textual
content are as follows:
1. Burg’s MEM Application For Subsurface Detection Improvement
2. Two-Layers Model Cassini Radar Data Simulation
3. T91 Data Analysis: Loss Tangent Estimation of Ligeia Mare
4. Upper Bound on Loss Tangent from Magnitude of Secondary Echo Peak
and below is a list of the figures which it contains:
Fs01. Burg Algorithm applied on simulated Cassini radar signal received from a two layer model.
Fs02. The reconstructed and original Cassini burst
Fs03. Simulated vs real Cassini data. Right panel
Fs04. SNR of the seabed detected echoes after coherent and incoherent processing algorithm.
Fs05. Linear regression of subsurface relative power (Ps/Pss) vs two-way transit time Δτ
Fs06. Loss tangent upper bound using all Ligeia echoes
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