Nyström least-squares collocation for regional geoid modeling with a large dataset

Ellipsoidal Equal-Area Panel Mascons from GRACE Intersatellite Geopotential Differences: A Preliminary Assessment over China

We present a mascon-type solution that partitions the Earth's surface into contiguous, gap-free, equal-area panels defined directly on the reference ellipsoid via an authalic-latitude mapping, eliminating the need for a constant-radius approximation or subsequent rescaling. Each panel is treated as a locally curved poi...

Surface-Data-Driven Multiple Elimination in the Common-Midpoint Domain and Its Application to Land Seismic Data

Surface-data-driven multiple elimination methods directly use surface data to predict and eliminate multiples without requiring a detailed subsurface velocity model, but can be computationally expensive and not always straightforward on land datasets. We present a unified framework in the common-midpoint (CMP) domain f...

A tool for new Hybrid models: a swift algorithm to calculate the left inverse of a square root of a horizontally localized climatological ensemble covariance matrix

Computing matrix inverses (or, e.g., left inverses) using known algorithms is in general computationally prohibitive in high dimension, such as in an operational weather forecasting context. In this article, a swift, scalable algorithm to calculate the left inverse (through singular values decompositions techniques) of...

A reduced order model framework suitable for geotechnical problems

Data-driven methods are of increasing popularity for solving problems in geotechnics, offering as they do, the possibility of high-fidelity results without the effort of a detailed deterministic numerical analysis (e.g. using finite elements). A wide range of approaches fall under the heading of Reduced Order Models...

Multiple solutions to geophysical inverse problems via tracking flights across a deeply incised model landscape

Certain geophysical inverse problems may be reduced to systems of sparse low-order polynomial equations. In simple systems of this type, the monomials are products of nodal values of a subsurface physical property, such as electrical conductivity, interior to a discretized modeling domain, whereas the coefficients ar...

Nearshore satellite-derived bathymetry estimation using Sentinel-2 multispectral data and ensemble learning