Aeromagnetic Compensation in Gradiometry—Performance, Model Stability, and Robustness

Noriega, Gerardo

doi:10.1109/lgrs.2014.2328436

Cited by 38 publications

(19 citation statements)

References 22 publications

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“…Thus, an additional flight consisting of the same maneuvers as the calibration flight is necessary [20], and only then, the robustness can be evaluated with the cross-calibration index [4] defined as…”

Section: A Test Methods and Datamentioning

confidence: 99%

Section: A Test Methods and Datamentioning

confidence: 99%

“…Generally, a large crosscalibration index indicates that the estimated coefficients are nonrobust [20]. The performance of an actual compensation system depends not only on the system itself but also on other external factors, e.g., the quality of the installation on the aircraft [20], which can be addressed in a separate way. Therefore, to avoid these effects, numerical simulation data sets are used to explore the decision function (18) and evaluate the performance of the adaptive filter.…”

Section: A Test Methods and Datamentioning

confidence: 99%

“…In order to evaluate and Manuscript received January 6, 2016; revised April 8, 2016 remove the magnetic interference, the coefficients should be estimated in advance through solving a system of linear equations which is established according to the Tolles-Lawson model. Improving the accuracy of the coefficients is critical to aeromagnetic compensation [20], which has so far been restricted by the poorly constrained nature of the system of linear equations. Two factors lead to the poorly constrained nature of the system of linear equations.…”

Section: Introductionmentioning

confidence: 99%

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An Adaptive Filter for Aeromagnetic Compensation Based on Wavelet Multiresolution Analysis

Dou

Han

Niu

et al. 2016

IEEE Geosci. Remote Sensing Lett.

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In aeromagnetic compensation, the multicolinearity of the Tolles-Lawson model is one of the main factors limiting the performance of the coefficient-estimating methods. Aside from the intrinsic characteristic of the Tolles-Lawson model, data filtering as a preprocessing step in estimating the coefficients has a significant impact on the multicolinearity. To solve this problem, an adaptive filter based on wavelet multiresolution analysis is proposed. By modifying the wavelet decomposition results of the Mallat algorithms and reconstructing the signal, the adaptive filter can be used to establish a system of linear equations not only by capturing the frequency characteristics of the aircraft maneuvers as is usual but also by having a weakened multicolinearity. Simulation results illustrate the effectiveness of the proposed adaptive filter.

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Section: A Test Methods and Datamentioning

confidence: 99%

Section: A Test Methods and Datamentioning

confidence: 99%

Section: A Test Methods and Datamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

An Adaptive Filter for Aeromagnetic Compensation Based on Wavelet Multiresolution Analysis

Dou

Han

Niu

et al. 2016

IEEE Geosci. Remote Sensing Lett.

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“…efficient aeromagnetic survey [2]. Many methods have been proposed to estimate the coefficients of the Tolles-Lawson model [3]- [6] and to improve their accuracy [7], [8].…”

mentioning

confidence: 99%

An Aeromagnetic Compensation Coefficient-Estimating Method Robust to Geomagnetic Gradient

Dou

Han

Niu

et al. 2016

IEEE Geosci. Remote Sensing Lett.

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Most existing methods used in aeromagnetic compensation assume a constant geomagnetic field. These methods do not take into consideration the geomagnetic gradient, which can reduce the accuracy of the estimated coefficients of the Tolles-Lawson model. In practice, aside from the magnetic interference from the aircraft, a residual component of the geomagnetic field is contained in the filtered magnetic field signal. In this letter, the component of the geomagnetic field in the filtered magnetic field signal is modeled as a function of the longitude, latitude, and altitude of the aircraft. The linear equation for estimating the coefficients is then extended by combining the Tolles-Lawson model with the proposed model. Simulation results indicate that the proposed method is able to include the variance caused by the geomagnetic gradient into the Tolles-Lawson model calculation and results in a better aeromagnetic compensation.

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Application of an improved calibration flight scheme in aeromagnetic interference compensation

Liu¹,

Wang²,

Sun³

et al. 2022

Preprint

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In aeromagnetic measurement, accurate compensation for the interference magnetic field generated by the aircraft platform due to the aircraft maneuvering in the Earth's magnetic field is an important prerequisite for the accurate indentification of the magnetic anomaly signal of the detection target. The flaws of the traditional calibration flight scheme in aeromagnetic interference compensation are firstly analyzed, and then an improved scheme is proposed, featuring smaller calibration flight areas, more simplified maneuvers, shorter flight route and less influence from the magnetometer's direction. The improved scheme can enhance the robustness of the aeromagnetic interference compensation matrix, and improve the compensation efficiency, and thus both the solved magnetic compensation coefficients and compensation effects are significantly improved. The experimental results of aeromagnetic interference compensation in an area of Inner Mongolia of China show that the average accuracy of the repeated survey lines, which are compensated by the improved scheme, can be increased by 5 nT and 3 nT, respectively, compared with the uncompensated results and the results compensated by the traditional scheme. Therefore, the effectiveness and superiority of the improved calibration flight scheme is fully proved.

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Aeromagnetic Compensation in Gradiometry—Performance, Model Stability, and Robustness

Cited by 38 publications

References 22 publications

An Adaptive Filter for Aeromagnetic Compensation Based on Wavelet Multiresolution Analysis

An Adaptive Filter for Aeromagnetic Compensation Based on Wavelet Multiresolution Analysis

An Aeromagnetic Compensation Coefficient-Estimating Method Robust to Geomagnetic Gradient

Application of an improved calibration flight scheme in aeromagnetic interference compensation

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