Martian Infrasound: Listening from NASA's InSight Lander
Abstract
We report on the various examples and initial interpretation of infrasound that has been detected by NASA's InSight Lander on Mars. InSight has a uniquely sensitive atmospheric pressure sensor with a noise level of order 10 mPa and the ability to record signals up to 20Hz, essentially continuously. InSight is also equipped with a pair of booms to collect wind and air temperature data at 1Hz. These have all been taking data nearly continuously since about 15 days after InSight landed on November 26, 2018.
At least three types of infrasound have been detected by InSight: Infrasound associated with atmospheric vortices (typically around 1-2Hz), infrasound in the evening (typically around 80s period), often within gravity waves (with periods around 600s), and finally red noise bursts lasting about 1 minute that intermittently occur mostly in the evening, but occasionally throughout the rest of the night.- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2019
- Bibcode:
- 2019AGUFM.A21S2809B
- Keywords:
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- 3346 Planetary meteorology;
- ATMOSPHERIC PROCESSES;
- 5405 Atmospheres;
- PLANETARY SCIENCES: SOLID SURFACE PLANETS;
- 5480 Volcanism;
- PLANETARY SCIENCES: SOLID SURFACE PLANETS;
- 7219 Seismic monitoring and test-ban treaty verification;
- SEISMOLOGY