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Sun Y.,Precise Guidance and Simulation Laboratory of the Second Artillery Engineering University | Wang S.-C.,Precise Guidance and Simulation Laboratory of the Second Artillery Engineering University | Zhang J.-S.,Precise Guidance and Simulation Laboratory of the Second Artillery Engineering University | Qiao Y.-K.,Precise Guidance and Simulation Laboratory of the Second Artillery Engineering University | Zhang Y.,Unit 96669 of the Second Artillery
Xitong Fangzhen Xuebao / Journal of System Simulation | Year: 2012

Data of geomagnetic field survey, especially the three-component data, can not meet the requirement of geomagnetic navigation research currently. A mathematic simulation method by calculating geomagnetic three-component value was proposed for geomagnetic navigation reference map in order to provide a rather real verification method for the next geomagnetic navigation technology research. Using Maxwell software to calculate the numerical value of magnetizing field about the magnetic substance, the space distributing of three-component static magnetic field was simulated. Adding geomagnetic time variation model and combinatorial error model, geomagnetic navigation reference map could be simulated after interpolated by radial basis function (RBF) method. Calculated result indicates that this simulation method has a high accuracy and can provide a verification platform for geomagnetic navigation research. Source


Sun Y.,Precise Guidance and Simulation Laboratory of the Second Artillery Engineering University | Zhang J.-S.,Precise Guidance and Simulation Laboratory of the Second Artillery Engineering University | Wang S.-C.,Precise Guidance and Simulation Laboratory of the Second Artillery Engineering University | Qiao Y.-K.,Precise Guidance and Simulation Laboratory of the Second Artillery Engineering University | Zhang Y.,Unit 96669 of the Second Artillery
Zhongguo Guanxing Jishu Xuebao/Journal of Chinese Inertial Technology | Year: 2011

Secular variation of main geomagnetic field is an important factor that influences the time-validity of geomagnetic navigation reference map. A method is proposed to update the variation using a model-predicted value. The secular variation model of main geomagnetic field is used to solve the time-variation problem of near-space geomagnetic navigation reference map. Secular variation model of the earth's main geomagnetic field is modeled based on WMM2010, and depending on this model, the secular variation model of near-space in China (30 km above sea level) is modeled. Calculated secular variation rates of geomagnetic components are used to update the time-variation. Experiment results indicate that the matching probability of updated map can reach more than 90%, and the effect is better when the time-interval is longer. The updated reference map by the secular variation model of main geomagnetic field has good adaptability. Source

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