double difference phase observation

例句：

1. 1. Thedouble difference phase observation technique is used toanalyze the Earth's magnetic field.
   双差相位观测技术用于分析地球的磁场。
2. 2.This research uses double difference phase observation tostudy the effects of climate change on theocean.
   这项研究使用双差相位观测来研究气候变化对海洋的影响。
3. 3. The double differencephase observation method has been widely applied ingeophysics and seismology.
   双差相位观测方法在地球物理学和地震学中得到了广泛应用。