CAJ | 학술논문

应用自然正交分量(NOC)方法,对1995～2006年中国地区36个地磁台的地磁场观测数据进行了计算,获得了上述数据矩阵的本征值和相应的空间域、时间域本征向量,并就其时空分布与中国地磁模型(CGM)进行了对比分析,探讨了它的物理意义.研究表明,上述观测数据包含了丰富的地磁内、外源场信息,其中地磁场要素F、D、I第一、第二本征值及相应的空间域和时间域的第一、第二本征向量所描述的地磁基本场时间变化与CGM吻合较好.
응용자연정교분량(NOC)방법,대1995～2006년중국지구36개지자태적지자장관측수거진행료계산,획득료상술수거구진적본정치화상응적공간역、시간역본정향량,병취기시공분포여중국지자모형(CGM)진행료대비분석,탐토료타적물리의의.연구표명,상술관측수거포함료봉부적지자내、외원장신식,기중지자장요소F、D、I제일、제이본정치급상응적공간역화시간역적제일、제이본정향량소묘술적지자기본장시간변화여CGM문합교호.
The geomagnetic data at 36 observatories in China during 1995~2006 were calculated by using the natural orthogonal component (NOC) method. We have obtained the eigenvalues and their corresponding eigenvectors in the space and time domains for the above-mentioned data matrix. A comparative analysis between its spatial-temporal distribution and the China Geomagnetic Model (CGM) is made, and its physical meaning is studied. The research shows that the these observational data contain rich information of the internal and external geomagnetic source fields. The first and the second eigenvalues of the geomagnetic field components F, D and I, and the temporal variations of the geomagnetic main field described by the first and the second eigenvalues of the corresponding spatial-temporal domains coincide fairly well with the CGM.