Transfer alignment in strapdown inertial navigation system using CCD star tracker

The devices error in inertial navigation system, especially gyro drift can mostly effect navigation precision, aim to make navigation system to work long time and with high precision of work, transfer alignment technology using Star tracker to estimate and compensate gyro drift and accelerometer bias is proposed with "velocity plus attitude" matching scheme, in which attitude information is provided by Star CCD star tracker and velocity information achieves from inertial navigation system, the simulation results indicates that gyro drift and acceleration bias can be fully estimated out in short time, whose precision can greatly improve by increasing estimation time.