Beyond Insight: Mitigating Challenges Associated With Placing a Long-Term Seismometer on Venus
Session: Insight Seismology on Mars: Results From the First Martian Year of Data and Prospects for the Future [Poster]
Type: Poster
Date: 4/23/2021
Presentation Time: 11:30 AM Pacific
Description:
Engineers at NASA Glenn Research Center have been working through the challenges in high temperature electronics associated with operating a long duration seismometer on the Venusian surface [Kremic et al., 2020, Planet. Spa. Sci., v. 190, 104961], including testing an InSight-based sensor under ambient Venusian conditions. While sensor and associated electronics are likely to reach sufficient technical maturity within the next few years, a major design restriction is that the seismometer will have a battery-limited lifetime. Both data transmission and data storage are power-hungry operations, so neither transmitting data continuously nor storing data for later transmission are feasible. Power-dictated data-rate restrictions may also limit the high-frequency response of the seismometer. The starting point for mitigation is using an amplitude trigger to start seismometer transmission for a specified time. Two initial questions that arise from this plan, and the starting point for answers, are as follows: 1) What should the threshold be set to? - Determine best estimate for the nature and level of Venusian seismicity using analogs from Earth. 2) What should the transmission time be set to, and how interpretable will the returned data be from this operating scenario? - Take real-world continuous records from Venus-analog stations and evaluate what subset of events are captured, and where in the event transmission would occur, using different simulated trigger thresholds, frequency bandwidths and transmission times. For 1), the good news for instrument design is that Venus analog settings such as the African plate, rollback subduction zones, and “quiet” plate interiors have seismicity levels within about an order of magnitude variation. For 2), we began by analyzing the data from a station in Interior Alaska away from major plate boundaries. Initial results suggest that we can reasonably assess overall seismicity, but pre-triggering bandpass filtering would have a major impact on the efficacy of the triggering and the nature of events recorded.
Presenting Author: Yuan Tian
Student Presenter: No
Authors
Yuan Tian Presenting Author Corresponding Author ytian4@alaska.edu University of Alaska Fairbanks |
Herrick Robert rrherrick@alaska.edu University of Alaska Fairbanks |
Micheal West mewest@alaska.edu University of Alaska Fairbanks |
Tibor Kremic tibor.kremic@nasa.gov National Aeronautics and Space Administration |
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Beyond Insight: Mitigating Challenges Associated With Placing a Long-Term Seismometer on Venus
Category
Insight Seismology on Mars: Results From the First Martian Year of Data and Prospects for the Future