In the rest of this paper, Strapdown INS
is used as Slave INS and the difference is not distinguished.
Although low-cost strapdown INS
based on micro-electronic-mechanical system (MEMS) devices has become more and more affordable for civil applications, it is not yet possible to build MEMS based INS which gives sub-meter position accuracy over one minute of operation without the aid of other sensors .
Hu, "Observability of strapdown INS
alignment: a global perspective," IEEE Transactions on Aerospace and Electronic Systems, vol.
Kumar, "Novel method for coarse alignment of strapdown INS
on oscillatory base," Journal of Aerospace Science & Technologies, vol.