Fig. 4: Extracted Rayleigh wave ellipticity curve compared with modeling results for pre-mission near-surface seismic models.
From: The shallow structure of Mars at the InSight landing site from inversion of ambient vibrations
The thick black line shows the Rayleigh wave ellipticity curve extracted for a 7-h duration time window in the evening of sol 422/423 (see Fig. 2). The vertical bars show the estimated data errors. Note that the errors were manually increased for the frequency range around 2 Hz that is known to be affected by monochromatic electronic cross-coupling noise39. Ellipticity curves for the fundamental and first higher Rayleigh wave modes computed for the two velocity models are shown in red and blue, respectively (models 1 and 2; Tables 1 and 2). Note that neither of the modeled Rayleigh wave ellipticity curves is able to explain the observed trough at 2.4 Hz.
