x
uploads/magnetic equator.jpg

magnetic equator 【天文學】磁赤道(= aclinic line)。

magnetic field

A new model was presented in a three dimensional geographic coodinate system to describe the linear growth of r - t instability so that the effects of magnetic inclination and declination were taken into accont . it is an generalization of former theories from equatorial to mid - latitude regions . from this model one can see the influence of magnetic strength , inclination and declination . due to the magnetic effects , the occurrence rate of the instability is not symmetric in longitudes even at the magnetic equator . some occurrence peaks or valleys will appear in certain places around the world 從三維地理坐標系出發建立模型,考慮了地磁傾角和偏角的影響,研究spread - f現象的全球分布特點,是對以前的研究從赤道地區向中低緯度地區的推廣。從該三維模型中可以看到地磁場的大小和位型的影響包括磁傾角和磁偏角的效應。由于地磁位型的不同,發生率的分布并不具有經度對稱性,即使在磁赤道附近也如此。