Article

Article title MAGNETIC GRADIOMETRY DATA IN THREAT DETECTION PROBLEMS
Authors A.K. Volkovitsky, E.V. Karshakov, B.V. Pavlov, M.Yu. Tkhorenko
Section SECTION III. SYSTEMS AND MEANS OF COMMUNICATION, NAVIGATION AND GUIDANCE
Month, Year 02, 2016 @en
Index UDC 527.62.1
DOI
Abstract The paper presents an application of magnetic gradiometry in detection problems of stationary and moving targets. An extensive literature review on utilization of magnetic measurements in different fields, such as archeology, geophysics, medicine, military technologies etc. is given. Based on the literature review a conclusion is drawn on usefulness of magnetic field gradient measurements usage in detection problems. Consideration is given to models and methods of magnetic field gradient measurements; the accuracy of proposed measuring schemes is estimated based on performance data of existing and possible future sensors. Use of tensor magnetic gradiometry in target detection problems is investigated carefully. An algorithm to localize a dipole magnetic source is given. It was shown that the algorithm detects the sensor-dipole direction with an ambiguity necessitating use of additional data. An application of moving magnetic gradient tensor sensors is considered separately. It is shown that use of several gradiometers let eliminate any ambiguity in the problem and determine the distance to a magnetic dipole and its dipole moment. Use of vector magnetic gradiometry data in detection problems is considered too. As in an above mentioned case of tensor magnetic gradiometry a problem of localizing a magnetic dipole source using measurement of its magnetic field gradient vector is analyzed. It is shown that utilization of measurements of the magnetic gradient vector provides the sensor-dipole direction with considerable errors not introducing an ambiguity. At the same time, a dipole source can be localized accurately if one knows the magnetic field vector itself. Furthermore, the paper discusses a choice of a sensor type and properties of stationary and moving magnetic detectors.

Download PDF

Keywords Magnetic gradiometry; magnetic gradient tensor; magnetic gradient vector; threat detection problems.
References 1. Foley C.P. et al. Geophysical Exploration Using Magnetic Gradiometry Based on HTS SQUIDs, IEEE Transactions on Applied Superconductivity, 2011, Vol. 11, issue 1, pp. 1375-1378.
2. Gallop J.C. SQUIDs and their applications, Journal of Physics E: Scientific Instruments, 1999, Vol. 9, pp. 417-429.
3. Zou N., Nehorai A. Detection of Ship Wakes Using an Airborne Magnetic Transducer, IEEE Transaction on Geoscience and Remote Sensing, 2000, Vol. 38, No. 1, pp. 512-539
4. William E.D. et al Performance Metrics for State-of-the-Art Airborne Magnetic and Electromagnetic Systems for Mapping and Detection of Unexploded Ordnance. 2010.
5. Xiaoming Z., Yan Z. Analysis of Key Technologies in Geomagnetic Navigation, 7th International Symposium on Instrumentation and Control Technology: Measurement Theory and Systems and Aeronautical Equipment, 2008, Vol. 7128, pp. (71282J-1)-(71282J-6).
6. Peshekhonov V.G. Navigatsionnye sistemy [Navigation system], Vestnik Rossiyskoy akademii nauk [Bulletin of the Russian Academy of Sciences], 1997, Vol. 67, No. 1, pp. 43-52.
7. Maleev P.I. i dr. Sostoyanie razvitiya i perspektivy ispol'zovaniya morskoy
magnitometricheskoy sistemy [Current state and perspectives of a naval magnetic system], Navigatsiya i gidrografiya [Navigation and Hydrography], 2006, No. 23, pp. 91-96.
8. Volkovitskiy A.K. i dr. Izmereniya fizicheskikh poley na bortu letatel'nogo apparata pri reshenii navigatsionnykh zadach [Airborne physical fields measurements as navigational aids], XXIX Konferentsii pamyati vydayushchegosya konstruktora giroskopicheskikh priborov N.N.
Ostryakova [XXIX Ostriakov’s memorial conference]. St. Petersburg: OAO «Kontsern «TsNII Elekropribor», 2014, pp. 232-241.
9. Wynn M. Magnetic Dipole Localization with a Total-Field Vector Gradiometer, MARELEC 2004.
10. Tkhorenko M.Yu. et al. Algorithm to Position an Object Moving in the Low-Frequency Electromagnetic Field, Automation and Remote Control, 2015, Vol. 76, No. 11, pp. 2033-2044.
11. Volkovitskiy A.K. i dr. O vozmozhnosti ispol'zovaniya agnitogradientnykh izmereniy na bortu letatel'nogo apparata [On Possibility of Airborne Magnetic Gradiometry Data Usage], Materialy konferentsii «Upravlenie v tekhnicheskikh sistemakh» (UTS-2010) [Control in Technical Systems – 2010], 2010, pp. 395-398.
12. Vovenko T.A. i dr. Modeli i struktura bortovykh izmereniy prostranstvennykh fizicheskikh poley [Models and Structure of Airborne Devices to Measure Spartial Physical Fields], Problemy upravleniya [Control Problems], 2015, No. 3, pp. 59-68.
13. Karshakov E.V. Primenenie izmereniy parametrov gradienta magnitnogo polya Zemli v zadache navigatsii letatel'nogo apparata [Application of Magnetic Gradiometry Data in Aircraft Navigation], Upravlenie bol'shimi sistemami [Control in large systems], 2011, Issue 35, pp. 265-282.
14. Karshakov E.V. i dr. Magnitnaya gradientometriya i ee navigatsionnoe primenenie [Magnetic Gradiometry and Its Navigational Applications], Materialy 10-y Vserossiyskoy nauchno-prakticheskoy konferentsii «Perspektivnye sistemy i zadachi upravleniya» [Materials of the 10th all-Russian scientific-practical conference "Advanced systems and control problems"], 2015, Vol. 1, pp. 345-355.
15. Noriega G. Performance measures in aeromagnetic compensation, Leading Edge, 2011, Vol. 30, No. 10, pp. 1122-1127.
16. Camara E., Guimaraes S. Magnetic Airborne Survey - Geophysical Flight, Geosci. Instrum. Method. Data Syst. Discuss. 2016.
17. Noriega G. Aeromagnetic Compensation in Gradiometry–Performance, Model Stability, and Robustness, IEEE Geoscience and Remote Sensing Letters, 2015, Vol. 12, No. 1, pp. 117-121.
18. Wiegert R., Oeshger J. Portable Magnetic Gradiometer for Real-Time Localization and Classification of Unexploded Ordnance, OCEANS 2006.
19. FitzGerald D. et al. Full Tensor Magnetic Gradiometry Processing and Interpretation Developments, 11th SGA Biennial Technical Meeting and Exhibition – 2009.
20. Purcell E. Electricity and Magnetism. 3rd Edition. Cambridge University Press, 2013, 853 p.

Comments are closed.