Companion guide to the marsquake catalog from InSight, Sols 0–478: Data content and non-seismic events
Résumé
The InSight (Interior Exploration using Seismic Investigations, Geodesy and Heat Transport) mission landed on the surface of Mars on November 26, 2018. One of the scientific instruments in the payload that is essential to
the mission is the SEIS package (Seismic Experiment for Interior Structure) which includes a very broadband and
a short period seismometer. More than one year since the landing, SEIS continues to be fully operational and has
been collecting an exceptional data set which contains not only the signals of seismic origins, but also noise and
artifacts induced by the martian environment, the hardware on the ground that includes the seismic sensors, and
the programmed operational activities of the lander. Many of these non-seismic signals will be unfamiliar to the
scientific community. In addition, many of these signals have signatures that may resemble seismic events either
or both in time and frequency domains. Here, we report our observations of common non-seismic signals as seen
during the first 478 sols of the SEIS data, i.e. from landing until the end of March 2020. This manuscript is
intended to provide a guide to scientists who use the data recorded on SEIS, detailing the general attributes of
the most commonly observed non-seismic features. It will help to clarify the characteristics of the seismic dataset
for future research, and to avoid misinterpretations when searching for marsquakes.
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