Abstract
It is difficult to directly experiment validation verification of polar navigation elements in high latitude regions for commonage. The indirect grid navigation verification method based on simulated earth polar regions which sets an arbitrary point on earth equator as the fictitious pole is presented. Firstly, the transverse earth frame is defined, and then the transformation between the transverse earth frame, and the conventional earth frame is deduced, which lays the foundation for the polar region simulation. Secondly, transverse wander azimuth mechanical inertial navigation system under the transverse earth frame is established, which demonstrates characters of polar region in low latitudes, viz., the positioning and heading become indeterminate at the fictions pole. Thirdly, design transverse indirect grid navigation algorithm by referring polar indirect grid navigation algorithm thinking, till the virtual polar region environment and its corresponding polar navigation algorithm are possessed. Lastly, verify the reasonableness of the virtual polar region and its corresponding navigation algorithm through shipborne Inertial Measurement Unit crossed the equator.
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