基于原子干涉的寻北技术

North- seeking Technique Based on Atom Interferometer

本文介绍的基于冷原子干涉的寻北技术是指在利用冷原子干涉过程中，通过转动倾斜的拉曼反射镜补偿地球自转，单点相位读取（PSR）干涉条纹的空间频率，从而实现寻北。冷原子干涉寻北能够实现全方位快速寻北，有效克服了目前寻北仪的缺点，为研制新型全方位快速高精度寻北仪提供了理论支撑和实践依据。

A new north - seeking technique based on cold atom interferometer is introduced. During the process of the atom interference, the tilted Raman mirror is rotated to compensate the earth rotation and the spatial atom interference is obtained. The spatial frequency of interference fringe is read by the phase shear readout （PSR）, and the direction of the true north is deter- mined. The atom north - seeking overcomes some shortcomings of present north seeking technique, and provides theoretical sup- port and practical basis for the new high precision north seeker.