magnetic annual variation[地物] 磁周年差;磁年差
magnetic grid variation磁方格偏角
magnetic c variation磁变
magnetic daily variation磁日变;磁周日变化
magnetic temporal variation[地物] 磁时变;暂时性时差
magnetic diurnal variation method磁日变法
magnetic diurnal variation anomaly磁日变异常
magnetic diurnal variation[地物] 磁周日变化;地磁日变;月日磁变;地磁日变化
multi-station magnetic diurnal variation correction多台站磁日变校正方法
N(名词) → another name for magnetic declination