Measurement of magnetic noise characteristics on select AUVs with some potential mitigation techniques

Magnetic signature control strategies for an unmanned aircraft system

“…Bono, Overway, Wynn, Allen, Purpura, and Matthews [24][25][26] present an alternative experimental method which involves attaching a UUV to a three-axis motion table rocking at known frequency. Several total-field magnetometers are positioned around the motion table and on the UUV, and the data was analyzed in the frequency spectrum to localize magnetic field sources.…”

“…Several total-field magnetometers are positioned around the motion table and on the UUV, and the data was analyzed in the frequency spectrum to localize magnetic field sources. Allen et al [25,26] also present a method similar to the pullover test discussed by Versteeg et al [20], which involves a set of magnetometers arranged in a gradiometer configuration located as closely as possible to the movement track. Both approaches were utilized on multiple UUV's, allowing for the localization of several noise sources and the improved selection of suitable magnetometer locations.…”

“…Both approaches were utilized on multiple UUV's, allowing for the localization of several noise sources and the improved selection of suitable magnetometer locations. A similar method to the gradiometer test outlined in [25,26] was used to analyze the magnetic signature of GeoSurv II, as is described in Chapter 7. 34…”

Magnetic sensor operation onboard an AUV: magnetic noise issues and a linear systems approach to mitigation

“…Since 1993, the Navy and others have developed tensor gradiometers based on fluxgate sensor technology [5]. These were originally directed toward hand-held applications, but are currently being used as tools to investigate sensor operation onboard AUVs, as detailed below and in a companion paper [ 6 ] . In more recent developments, the Navy is focusing on laser-pumped total-field gradiometer technology, initially for airborne applications [7], but now for buried mine detection [SI, as well.…”