Horizontal attitude calibration technology of inertial navigation based on star measurement

Horizontal attitude calibration is an important means for improving the precision of the space tracking,telemetering and command ship's inertial navigation system.Since rigorous condition and low precision exist in the traditional methods such as attitude difference,platform rotation and simultaneous equations of theodolite's azimuth-elevation etc.,a new technology of horizontal attitude calibration of inertial navigation based on star measurement was presented,which is independent solution method of pitching undershoot error.The formula was concluded and its precision was analyzed.The precision verifying of the inertial navigation system and trial results show that its error less than 5.8″,and it is high reliable and can resolve the problem of horizontal attitude calibration of inertial navigation in dynamic condition,which contribute to the improvement of horizontal attitude precision of inertial navigation,zero calibration of accelerometer in dynamic condition and afterwards processing of actual data.It can improve the precision of the space tracking,telemetering and command ship.