公开(公告)号：US20250020739A1

公开(公告)日：2025-01-16

申请号：US18768522

申请日：2024-07-10

Applicant: The Regents of The University of Michigan

Inventor： Alex HOFFMANN ,  Mark B. MOLDWIN

IPC: G01R33/02 ,  G01R33/025

Abstract: An interference removal technique, called Wavelet-Adaptive Interference Cancellation for Underdetermined Platforms (WAIC-UP), is provided to effectively eliminate stray magnetic field signals using multiple magnetometers, without requiring prior knowledge of the spectral content, location, or magnitude of the interference signals. WAIC-UP capitalizes on the distinct spectral properties of various interference signals and employs an analytical method to separate them from ambient magnetic field in the wavelet domain.

公开(公告)号：US20240353504A1

公开(公告)日：2024-10-24

申请号：US18636334

申请日：2024-04-16

Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGAN

Inventor： Eftyhia ZESTA ,  Alex HOFFMANN ,  Lauro V. OJEDA ,  Mark B. MOLDWIN

IPC: G01R33/00 ,  G01V3/38 ,  G01V3/40

CPC classification number: G01R33/0029 ,  G01V3/38 ,  G01V3/40 ,  G01R33/0094

Abstract: A system and method for separating spacecraft generated magnetic noise from geomagnetic field data includes detecting magnetic information using a plurality of magnetometers and outputting a representative detection signal, the magnetic information comprising magnetic noise and geomagnetic field data; receiving the representative detection signal including the magnetic information from the plurality of magnetometers and resolving the magnetic noise data and the geomagnetic field data by analyzing a relative gain and phase of the representative detection signal in a time-frequency (TF) domain, if a noise signal of the representative detection signal is sparse in the TF domain then the relative gain and phase is found using cluster analysis, and separating a geomagnetic field data signal from a magnetic noise data signal using cluster centroids in compressive sensing based on the cluster analysis. The system and method further includes outputting a resultant signal representative of at least the geomagnetic field data signal.