MSI Seminar - "Studying Planetary Lithospheres Using Modern Localization Methods"

Frederik J. Simons (Princeton University)

Date: Jan 22, 2019 3:30 PM
Location: MSI Conference Room, 3550 University
MSI Seminar

Title: Studying Planetary Lithospheres Using Modern Localization Methods

Abstract:All planetary geology is local, so to speak, yet many modern techniques to analyze geophysical signals, from satellite gravity and the geoid, the lithospheric magnetic field, to the making of seismological earth models, heavily rely on a global function basis - the spherical harmonics. When the available data are incomplete and/or noisy, or when the desired models or the features to be extracted are geographically localized (geomorphological structures, magnetic anomalies, earthquakes, ocean topography, regional-scale anomalies, etc), these have easily demonstrable shortcomings. Enter Slepian functions: firmly rooted in the theory of potential fields, they are designed to combine the best of both the spatial and spectral viewpoints by achieving optimal spatio-spectral localization. A basis of Slepian functions for geophysical signals is sparse, and when used as windows to taper data for spectral analysis, they allow for the robust extraction of localized power. Among the applications are the analysis of the time-variable gravity field for the recovery of the signal of melting ice caps in Greenland and Antarctica or of coseismic gravity perturbations, the localization of geologically relevant and coherent areas on the surface of Venus, the analysis of the Martian magnetic field for the signature of its crustal source depth and intensities, of the terrestrial magnetic field for the separation of the signature of oceanic and continental magnetic anomalies, the recovery of the power spectral density of the cosmic microwave background radiation, and the filtering of the geoid for geodynamic applications, and more.




Upcoming Events

MSI Seminar - "Studying Planetary Lithospheres Using Modern Localization Methods"

Frederik J. Simons (Princeton University)

Date: Jan 22, 2019 3:30 PM
Location: MSI Conference Room, 3550 University
MSI Seminar
Read More ⇒

iRex Cafe @ MSI

Date: Jan 23, 2019 9:30 AM
Location: MSI Lounge (3550 University)
Weekly Event
Read More ⇒

Neutron Star Discussion

Date: Jan 24, 2019 3:30 PM
Location: MSI Lounge (3550 University)
Weekly Event
Read More ⇒

Anna McPherson Public Lecture 2019 - "New Windows on the Cosmos"

Wendy Freedman (University of Chicago)

Date: Jan 24, 2019 6:30 PM
Location: Leacock Auditorium (room 132), McGill University, 845 rue Sherbrooke O, Montreal
Anna McPherson Public Lecture 2019
Read More ⇒

Astro Ph

Date: Jan 25, 2019 10:30 AM
Location: MSI Lounge (3550 University)
Weekly Event
Read More ⇒

MSI Lunch Talks

TBD

Date: Jan 28, 2019 12:00 PM
Location: MSI Conference Room (3550 University)
Other Event
Read More ⇒

Astro Seminar - Enrico Ramirez-Ruiz

Enrico Ramirez-Ruiz (UC Santa Cruz)

Date: Jan 29, 2019 3:30 PM
Location: Bell Room, Rutherford Physics
Astro Seminar
Read More ⇒

Astronomie en fût MTL #20 (FR)

Cynthia Genest-Beaulieu & Carter Rhea (Universite de Montreal)

Date: Jan 29, 2019 7:00 PM
Location: Pub l'Ile Noire
Astro on Tap
Read More ⇒

Public AstroNight - "Psyche: Journey to a Metal World"

Lindy Elkins-Tanton (Arizona State University)

Date: Jan 31, 2019 7:00 PM
Location: Frank Dawson Adams Auditorium, 3450 University St.
Public Lecture
Read More ⇒

MSI Seminar

TBD

Date: Feb 5, 2019 3:30 PM
Seminar Event
Read More ⇒


Past Events

Astro Seminar - The Terahertz Intensity Mapper (TIM)

James Aguirre (University of Pennsylvania)

Date: Jan 15, 2019 3:30 PM
Location: Bell Room, Rutherford Physics
Astro Seminar
Read More ⇒

EPOD

Date: Jan 15, 2019 2:00 PM
Location: MSI Lounge (3550 University)
Other Event
Read More ⇒

MSI Lunch Talks

Jeremie Choquette & Paul Charlton (McGill University)

Date: Jan 14, 2019 12:00 PM
Location: MSI Conference Room (3550 University)
Other Event
Read More ⇒

MSI Seminar - "Insights into dark matter from the stellar halos of galaxies"

Robyn Sanderson (University of Pennsylvania)

Date: Jan 8, 2019 3:30 PM
Location: MSI Conference Room (3550 University)
MSI Seminar
Read More ⇒

Special Seminar - "An Absorption Feature in the Sky-Averaged Radio Spectrum"

Raul Monsalve (McGill University)

Date: Dec 18, 2018 3:30 PM
Location: MSI Conference Room, 3550 University
Special Seminar
Read More ⇒