Because of the harsh polar environment, the master strapdown inertial navigation system (SINS) has low accuracy and the system model information becomes abnormal. In this case, existing polar transfer alignment (TA) algorithms which use the measurement information provided by master SINS would lose their effectiveness. In this paper, a new polar TA algorithm with the aid of a star sensor and ba...

This paper studies an underwater positioning algorithm based on the interactive assistance of a strapdown inertial navigation system (SINS) and LBL, and this algorithm mainly includes an optimal correlation algorithm with aided tracking of an SINS/Doppler velocity log (DVL)/magnetic compass pilot (MCP), a three-dimensional TDOA positioning algorithm of Taylor series expansion and a multi-sensor...

In airborne MEMS SINS transfer alignment, the error of MEMS IMU is highly environment-dependent and the parameters of the system model are also uncertain, which may lead to large error and bad convergence of the Kalman filter. In order to solve this problem, an improved adaptive incremental Kalman filter (AIKF) algorithm is proposed. First, the model of SINS transfer alignment is defined based ...

Forgiveness. The Bible says we have offended a holy God and that we need to be forgiven of that offense before we can be in fellowship with God. There are not many ways to receive such forgiveness, because only the One who has been offended can forgive us of our offense (Mark 2:5-7). Jesus alone paid the penalty for our sin through His death on the cross (2 Cor. 5:21). He thereby cleared the wa...

Spectroscopic interrogation of materials in the midinfrared with nanometer spatial resolution is inherently difficult due to long wavelengths involved, reduced detector efficiencies, and limited availability spectrally bright, coherent light sources. Technological advances are driving techniques that overcome these challenges, enabling material characterization this relatively unexplored spectr...