Deployment and surface operations of the SEIS instrument onboard the InSight mission

On November 26th, 2018, the InSight spacecraft successfully landed on Mars after a 6-month journey. After a long deployment and commissioning phase, the SEIS (Seismic Experiment for Interior Structure) instrument was ready to monitor seismic events on the Elysium Planitia plain on the surface of Mars, coupled with the APSS (Auxiliary Payload Sensor Suite) weather station equipped with a magnetometer, wind sensors, and a pressure sensor. The InSight mission goal is to characterize the deep interior structure of Mars, including the thickness and structure of the crust, the composition and structure of the mantle, and the size of the core. Its nominal duration of two years (2019–2020) has yielded unprecedented results with the detection of the first Martian seismic events ever recorded, and the in-depth characterization of its atmosphere with the best weather station ever deployed on Mars. InSight has collected an outstanding amount of high-quality measurements that the scientific community will spend many years analyzing. The extended mission has started and covers the years 2021 and 2022. This paper will describe the operations of the SEIS experiment on Mars since landing, as well as the challenges of operating this instrument. Energy becomes increasingly limited for payloads on Mars due to a significant amount of dust accumulated on the solar panels and the many dust storms in the Martian atmosphere. A new activity was decided for the extended mission in 2021 which consisted in burying the seismometer cable (or tether) with Martian regolith collected locally using the robotic arm, in order to reduce the seismic noise from that subsystem. Preparation activities, testing, results, associated challenges and lessons learned will be presented. Moreover, the paper will address the challenges faced in carrying out operations with COVID-related constraints, as finding oneself operating a seismometer on Mars from home can be challenging. Finally, management of periods of solar conjunctions, during which communication between Earth and Mars is unavailable, will be addressed. © 2022 IAA

Assessment of Critical Dependencies for Rapid Disaster Recovery

The Metropolitan Wastewater Management Commission assessed performance of wastewater conveyance and treatment facilities for two catastrophic natural disasters: the Cascadia Subduction Zone seismic event (magnitude 9.0 to 9.2) and catastrophic 500-year flood event adjusted to reflect exacerbations from climate change. Performance was assessed with respect to achieving post disaster recovery goals set forth in the Oregon Resiliency Plan. As part of the assessment MWMC identified and assessed critical dependencies that could substantially impact their ability to respond and recover from the natural disasters. MWMC identified the most critical dependencies through collaborative staff engagement. The collaborative effort and assessments that followed allowed MWMC to identify actions that would help better prepare for any disaster event and minimize the potential for cascading failures. As an example, MWMC's Continuity of Operations Plan was as a useful tool for establishing minimum staffing levels for essential operations during the COVID-19 pandemic. Copyright © 2021 Water Environment Federation