A5001796994- Planetary Science and Exploration
- Astro and Planetary Science
- Geophysics and Sensor Technology
- Seismic Waves and Analysis
- earthquake and tectonic studies
- Methane Hydrates and Related Phenomena
- High-pressure geophysics and materials
- Space Exploration and Technology
- Seismic Imaging and Inversion Techniques
- Geological Modeling and Analysis
- Space Science and Extraterrestrial Life
- Power Line Communications and Noise
- Marine and environmental studies
- Earthquake Detection and Analysis
- Geological and Geochemical Analysis
- Space Satellite Systems and Control
- Geology and Paleoclimatology Research
- Islanding Detection in Power Systems
- Digital Platforms and Economics
- Power Quality and Harmonics
- Power Systems and Technologies
- Spacecraft and Cryogenic Technologies
- Opportunistic and Delay-Tolerant Networks
- Scientific Research and Discoveries
- Hydrocarbon exploration and reservoir analysis
Jet Propulsion Laboratory
2019-2023
Ludwig-Maximilians-Universität München
2018-2022
University of Cambridge
2013-2020
Durham University
2015
Several seismic experiments were deployed on the Moon by astronauts during Apollo missions. The began in 1969 with 11, and continued 12, 14, 15, 16 17. Instruments at 17 remained operational until final transmission 1977. These remarkable provide a valuable resource. Now is good time to review this resource, since InSight mission returning data from Mars, missions Europa are development different space agencies. We present an overview of available four sets Moon: Passive Seismic Experiments,...
Welcome to the wonderful world of AxiSEM3D, a flexible, high-performance computational method for solving elastodynamic wave equation in three-dimensional, hetereogeneous media. It has been used seismology Earth, Sun, Moon, and many other rocky planets moons Solar System. In this manual, we will explore practicalities using code, touching on mathematical aspects as relevant casual user, input output files, pre- post-processing. This guide is not replacement any AxiSEM3D papers, which you...
We carry out a joint inversion of surface wave dispersion curves and teleseismic shear arrival times across the Tibetan collision zone, from just south Himalaya to Qaidam Basin at northeastern margin plateau, 600 km depth. The data consist Rayleigh-wave group curves, mainly in period range 10 70 s, with maximum 2877 source–receiver pairs. body more than 8000 S-wave recorded 356 telesesmic events. tomographic images show 'wedge' fast seismic velocities beneath central Tibet that starts...
Before deploying to the surface of Mars, short-period (SP) seismometer InSight mission operated on deck for a total 48 hours. This dataset can be used understand how deck-mounted seismometers in future landed missions Europa, and other planetary bodies. While operating deck, SP showed signals comparable Viking-2 near 3 Hz where sensitivity Viking instrument peaked. Wind similar patterns instrument, although amplitudes were ~80% larger given wind velocity. However, during low evening hours...
The Tien Shan is the largest active intracontinental orogenic belt on Earth. To better understand processes causing mountains to form at great distances from a plate boundary, we analyse passive source seismic data collected 40 broad-band stations of MANAS project (2005–2007) and 12 permanent KRNET network determine variations in crustal thickness shear wave speed across range. We jointly invert P- S-wave receiver functions with surface observations both earthquakes ambient noise reduce...
ABSTRACT We investigate the scattering attenuation characteristics of Martian crust and uppermost mantle to understand structure interior. examine energy decay spectral envelopes for 21 high-quality seismic events from sols 128 500 InSight operations. use model Dainty, Toksöz, et al. (1974) approximate behavior resulting scattered wave propagation through a single diffusive layer over an elastic half-space. Using grid search, we mapped parameters that fit observed data envelopes. The...
The northeastern margin of the Tibetan Plateau, which includes Qiangtang and Songpan-Ganzi terranes as well Kunlun Shan Qaidam Basin, continues to deform in response ongoing India–Eurasia collision. To test competing hypotheses concerning mechanisms for this deformation, we assembled a high-quality data set approximately 14 000 P- 4000 S-wave arrival times from earthquakes at teleseismic distances International Deep Profiling Tibet Himalaya, Phase IV broad-band seismometer deployments. We...
Abstract Seismology is a powerful tool for probing the deep interiors of planetary bodies. Just as moonquakes triggered by Earth’s tides occur on Moon, observed Apollo seismometers, icy moons giant planets may also have seismically active interiors, opening up future prospects in situ seismic investigations at their surfaces. Of notable interest Jupiter’s moon Europa, with its dynamic ice shell and potentially habitable subsurface ocean. In this work, we use different interior models Moon...
Abstract The Apollo astronauts deployed seismic experiments on the nearside of Moon between 1969 and 1972. Five stations collected passive data. 11 operated for around 20 days, 12, 14, 15, 16 nearly continuously from their installation until 1977. Seismic data were digitized transmitted to Earth. recorded magnetic reel-to-reel tapes, with timestamps representing signal reception time taped have been widely used many applications previously shared in various formats. slightly varying sampling...
In 2007, the National Academies designated "understanding structure & composition of lunar interior" (to provide fundamental information on evolution a differentiated planetary body) as second highest science priority that needed to be addressed. Here we present current status planned response Lunar Geophysical Network (LGN) team upcoming New Frontiers-5 AO. The Moon represents an end-member in differentiation rocky bodies. Its small size (and heat budget) means early stages have been frozen...
Abstract Seismometers deployed on the Moon by Apollo astronauts from 1969 to 1972 detected moonquakes and impacts, added our understanding of lunar interior. Several missions are currently being planned, including Commercial Lunar Payload Services (CLPS), Geophysical Network, astronaut program Artemis. We propose a microseismometer for Moon: Silicon Seismic Package (SSP). The SSP’s sensors etched in silicon, predicted have noise floor below <mml:math...
Abstract Detecting a seismic event from Europa's silicate interior would provide information about the geologic and tectonic setting of moon's rocky interior. However, subsurface ocean will attenuate signal, possibly preventing waveforms being detected by surface seismometer. Here, we investigate minimum magnitude detectable originating We analyze likely signal‐to‐noise ratios compare predicted signal strengths to current instrument sensitivities. show that M w ≥ 3.5 be sufficient overcome...
Whitepaper #098 submitted to the Planetary Science and Astrobiology Decadal Survey 2023-2032. Topics: interior evolution volcanism; Mercury and/or Moon; solar system formation, dynamics processes, chronology
Abstract During the Apollo missions, used spacecraft were deliberately crashed into Moon to provide large signals for seismic experiments. We use AxiSEM3D and a variety of 1D 3D models model these impacts propagate waves across in 3D. Simulations using smoothly varying background model, which include scattering heterogeneities 50 km depth, reproduced some observations, especially farther from source. These simulations have an emergent onset increase decay envelope. However, close source...
ABSTRACT Efficient computer programming is becoming a central requirement in quantitative Earth science education. This applies not only to the early career stage but—due rapid evolution of paradigms—also throughout professional life. At universities, workshops, or any software training events, efficient practical exercises are hampered by heterogeneity hardware and setups participants. Jupyter notebooks offer an attractive solution providing platform‐independent concept allowing combination...
&lt;p&gt;The Farside Seismic Suite (FSS), recently selected for flight as part of the NASA PRISM (Payloads and Research Investigations on Surface Moon) program planned in 2024 or 2025, would deliver two seismometers (both flight-proven through InSight mission to Mars [Banerdt et al., 2020]) Schr&amp;#246;dinger Basin. The vertical Very BroadBand (VBB) seismometer is most sensitive flight-ready ever built [Lognonn&amp;#233; 2019], while Short Period (SP) sensor mature compact...
The National Academy's current Planetary Decadal Survey (NRC, 2011) prioritizes a future Lunar Geophysical Network (LGN) mission to gather new information that will permit us better determine how the overall composition and structure of Moon inform about initial differentiation subsequent evolution terrestrial planets. Presentation Date: Wednesday, October 14, 2020 Session Start Time: 8:30 AM 9:45 Location: 351F Type: Oral
This paper describes a new power line carrier AMR (automatic meter reading) system which is currently being tested in several major pilot schemes. The believed to be unique offering data rates of up 19,200 bps over both LV and MV (11 kV) distribution networks. Novel, low cost, noninvasive inductive signal coupling techniques have been developed facilitate cost-effective communications underground overhead A programmable electricity has order demonstrate wide range benefits, including AMR,...
Whitepaper #219 submitted to the Planetary Science and Astrobiology Decadal Survey 2023-2032. Topics: interior evolution volcanism; Mercury and/or Moon; solar system formation, dynamics processes, chronology