Autocorrelation Infrasound Interferometry on Mars

A high-sensitivity pressure sensor was deployed as part of the Mars Interior Exploration using Seismic Investigations, Geodesy and Heat Transport lander on Elysium Planitia in November 2018. We use records from 1 October to 31 December 2019 (Sol 301–389) for frequencies between 0.1 0.5 Hz infer relative sound-speed changes Martian atmosphere autocorrelation infrasound interferometry method. find that are up ±15%, follow a similar pattern Martian-daily variations atmospheric temperature horizontal wind velocity, those inferred in-situ observations climatology. The speed synchronous, while peaks ∼1.88 hr after these time series. strong continuous emergence coherent phases codas suggests presence Mars.