Model stability and robustness in aeromagnetic compensation

Noriega, Gerardo

doi:10.3997/1365-2397.2013008

Cited by 20 publications

(14 citation statements)

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“…While having advantages over other alternatives [21], e.g., the figure of merit [29], the standard deviation σ A cannot ensure the robustness of the estimated coefficients [4]. 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%

“…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%

“…For decades, much work on different aspects (such as modeling and analysis [1]- [4], parameter estimation [5]- [10], system implementation [11]- [18], etc.) has been carried out in the field of aeromagnetic compensation, and commercial systems are available from a number of companies [19].…”

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%

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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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show abstract

Section: Introductionmentioning

confidence: 99%

“…For manned aircraft, the issue of minimizing interference on aeromagnetic data has been addressed thoroughly by developing compensation strategies both in software and in hardware (Hardwick 1984;Noriega 2011Noriega , 2013Dou et al 2016a,b). In both cases, compensation requires a calibration flight to establish the relationship between flight manoeuvres and the corresponding changes in the magnetic signal (Leliak 1961;Zhang, Guo and Qiao 2011;Jianjun, Chunsheng, and Hao 2014).…”

Section: Introductionmentioning

confidence: 99%

Real‐time compensation of magnetic data acquired by a single‐rotor unmanned aircraft system

Tuck

Samson

Polowick

et al. 2019

Geophysical Prospecting

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Two methods for low‐altitude calibration of a single‐rotor unmanned aircraft system using a real‐time compensator are tested: (1) a stationary calibration where the unmanned aircraft system executes manoeuvres while hovering in order to minimize ambient field changes due to the local geology; and (2) an adapted box calibration flown in four orthogonal directions. Both methods use two compensator‐specific limits derived from established methods for manned airborne calibration: the lowest frequency used by the compensator for the calibration algorithm and the maximum variation of the ambient magnetic intensity experienced by the unmanned aircraft system during calibration. Prior to flying, the unmanned aircraft system was magnetically characterized using the heading error and fourth difference. Magnetic interference was mitigated by extending the magnetometer‐unmanned aircraft system separation distance to 1.7 m, shielding, and demagnetization. The stationary calibration yielded an improvement ratio of 8.595 and a standard deviation of the compensated total magnetic intensity of 0.075 nT (estimated Figure‐of‐Merit of 3.8 nT). The box calibration also yielded an improvement ratio of 3.989 and a standard deviation of the compensated total magnetic intensity of 0.083 nT (estimated Figure‐of‐Merit of 4.2 nT). The stationary and box calibration solutions were robust with low cross‐correlation indexes (1.090 and 1.048, respectively) when applied to a non‐native data set.

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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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Model stability and robustness in aeromagnetic compensation

Cited by 20 publications

References 0 publications

An Adaptive Filter for Aeromagnetic Compensation Based on Wavelet Multiresolution Analysis

An Adaptive Filter for Aeromagnetic Compensation Based on Wavelet Multiresolution Analysis

Real‐time compensation of magnetic data acquired by a single‐rotor unmanned aircraft system

Application of an improved calibration flight scheme in aeromagnetic interference compensation

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