Magnetic Field Satellite (MAGSAT) Spacecraft Vector Magnetometer Calibration

1980 ◽  
Author(s):  
Sanford W. Hinkal
Keyword(s):  
Magnetic Field ◽  
Vector Magnetometer ◽  
Magnetometer Calibration

scholarly journals Use of Magnetic Field for Mitigating Gyroscope Errors for Indoor Pedestrian Positioning

Sensors ◽  
2018 ◽  
Vol 18 (8) ◽  
pp. 2592 ◽  
Author(s):  
Ming Ma ◽  
Qian Song ◽  
Yang Gu ◽  
Zhimin Zhou
Keyword(s):  
Magnetic Field ◽  
Static Magnetic Field ◽  
Inertial Navigation System ◽  
Three Dimensional ◽  
Calibration Method ◽  
Rate Of Change ◽  
Superior Performance ◽  
Novel Approach ◽  
Straight Line ◽  
Magnetometer Calibration

In the field of indoor pedestrian positioning, the improved Quasi-Static magnetic Field (iQSF) method has been proposed to estimate gyroscope biases in magnetically perturbed environments. However, this method is only effective when a person walks along straight-line paths. For other curved or more complex path patterns, the iQSF method would fail to detect the quasi-static magnetic field. To address this issue, a novel approach is developed for quasi-static magnetic field detection in foot-mounted Inertial Navigation System. The proposed method detects the quasi-static magnetic field using the rate of change in differences between the magnetically derived heading and the heading derived from gyroscope. In addition, to eliminate the distortions caused by system platforms and shoes, a magnetometer calibration method is developed and the calibration is transformed from three-dimensional to two-dimensional coordinate according to the motion model of a pedestrian. The experimental results demonstrate that the proposed method can provide superior performance in suppressing the heading errors with the comparison to iQSF method.

scholarly journals Magnetometer Calibration and Field Mapping through Thin Plate Splines

Sensors ◽  
2019 ◽  
Vol 19 (2) ◽  
pp. 280 ◽  
Author(s):  
Marco Muraccini ◽  
Anna Mangia ◽  
Maurizio Lannocca ◽  
Angelo Cappello
Keyword(s):  
Magnetic Field ◽  
Thin Plate ◽  
Indoor Localization ◽  
Information Source ◽  
Attitude Estimation ◽  
Local Magnetic Field ◽  
Simultaneous Estimation ◽  
Thin Plate Splines ◽  
Field Mapping ◽  
Magnetometer Calibration

While the undisturbed Earth’s magnetic field represents a fundamental information source for orientation purposes, magnetic distortions have been mostly considered as a source of error. However, when distortions are temporally stable and spatially distinctive, they could provide a unique magnetic landscape that can be used in different applications, from indoor localization to sensor fusion algorithms for attitude estimation. The main purpose of this work, therefore, is to present a method to characterize the 3D magnetic vector in every point of the measurement volume. The possibility of describing the 3D magnetic field map through Thin Plate Splines (TPS) interpolation is investigated and demonstrated. An algorithm for the simultaneous estimation of the parameters related to magnetometer calibration and those describing the magnetic map, is proposed and tested on both simulated and real data. Results demonstrate that an accurate description of the local magnetic field using TPS interpolation is possible. The proposed procedure leads to errors in the estimation of the local magnetic direction with a standard deviation lower than 1 degree. Magnetometer calibration and magnetic field mapping could be integrated into different algorithms, for example to improve attitude estimation in highly distorted environments or as an aid to indoor localization.

scholarly journals Modeling magnetostratigraphy in a borehole

Geophysics ◽  
1989 ◽  
Vol 54 (8) ◽  
pp. 973-983 ◽  
Author(s):  
Yves Gallet ◽  
Vincent Courtillot
Keyword(s):  
Magnetic Field ◽  
Remanent Magnetization ◽  
Operation Mode ◽  
Resolving Power ◽  
Vertical Profiles ◽  
Rock Property ◽  
Hole Radius ◽  
Differential Operation ◽  
Vector Magnetometer ◽  
The Magnetic Field

The magnetic field along a hole bored through a sequence of dipping layers with varying magnetization and planar interfaces is calculated. The emphasis is on recovering remanent magnetization polarity transitions for magnetostratigraphic applications (dating, correlations), although intensity of remanent magnetization can in itself be a useful rock property. Results are presented for various cases of geologic interest in the form of axial vertical profiles and section maps of the holes at varying distances from polarity reversal interfaces. The vertical profiles demonstrate a resolving power of about six times the hole radius; meaningful magnetostratigraphies can be expected for rocks with a magnetization larger than [Formula: see text], for instruments with a sensitivity of 0.1 nT. In a number of natural occurrences, it may not be necessary to resort to progressive demagnetization to recover the polarity sequence. Depending on which magnetic field and magnetization component one looks at, the section maps display characteristic patterns, in which, for instance, the direction of magnetization and the dip of the layers interfere. These maps are discussed in some detail. They can be used as guidelines to build a multisensor vector magnetometer (downhole magnetostratigraphic tool), whose output should be coupled with measurement of magnetic susceptibility for reduction of induced magnetization and with output from a surface instrument in a differential operation mode to reduce transient magnetic variations.

Shipboard Vector Magnetometer Calibration

2021 ◽  
pp. 1-1
Author(s):  
Paul J. Frontera ◽  
Stephen M. Alessandrini
Keyword(s):  
Vector Magnetometer ◽  
Magnetometer Calibration

scholarly journals Complete Triaxis Magnetometer Calibration in the Magnetic Domain

2010 ◽  
Vol 2010 ◽  
pp. 1-10 ◽  
Author(s):  
Valérie Renaudin ◽  
Muhammad Haris Afzal ◽  
Gérard Lachapelle
Keyword(s):  
Magnetic Field ◽  
Magnetic Domain ◽  
Scale Factors ◽  
Magnetic Perturbations ◽  
Consistent Solution ◽  
Magnetometer Calibration ◽  
Additional Perturbation ◽  
The Magnetic Field ◽  
Fitting Problem ◽  
Calibration Parameters

This paper presents an algorithm for calibrating erroneous tri-axis magnetometers in the magnetic field domain. Unlike existing algorithms, no simplification is made on the nature of errors to ease the estimation. A complete error model, including instrumentation errors (scale factors, nonorthogonality, and offsets) and magnetic deviations (soft and hard iron) on the host platform, is elaborated. An adaptive least squares estimator provides a consistent solution to the ellipsoid fitting problem and the magnetometer's calibration parameters are derived. The calibration is experimentally assessed with two artificial magnetic perturbations introduced close to the sensor on the host platform and without additional perturbation. In all configurations, the algorithm successfully converges to a good estimate of the said errors. Comparing the magnetically derived headings with a GNSS/INS reference, the results show a major improvement in terms of heading accuracy after the calibration.

scholarly journals In situ vector calibration of magnetic observatories

2017 ◽  
Vol 6 (2) ◽  
pp. 361-366 ◽  
Author(s):  
Alexandre Gonsette ◽  
Jean Rasson ◽  
François Humbled
Keyword(s):  
Magnetic Field ◽  
Calibration Method ◽  
Scale Factor ◽  
Magnetic Field Measurement ◽  
Calibration Error ◽  
Practical Case ◽  
Data Quality Control ◽  
Vector Magnetometer ◽  
Set Up ◽  
Magnetic Observatories

Abstract. The goal of magnetic observatories is to measure and provide a vector magnetic field in a geodetic coordinate system. For that purpose, instrument set-up and calibration are crucial. In particular, the scale factor and orientation of a vector magnetometer may affect the magnetic field measurement. Here, we highlight the baseline concept and demonstrate that it is essential for data quality control. We show how the baselines can highlight a possible calibration error. We also provide a calibration method based on high-frequency absolute measurements. This method determines a transformation matrix for correcting variometer data suffering from scale factor and orientation errors. We finally present a practical case where recovered data have been successfully compared to those coming from a reference magnetometer.

Sign in / Sign up

Export Citation Format

Share Document