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Session B1a: Atmospheric Effects

Performances Improvement of an Inertial Navigation System (INS) by Sensing and Modeling the Atmospheric Optical Depth Using Murray Gell-Mann’s Quantum Theory (QED)
Shlomi Voro, Lirhot Systems Ltd. Kfir Malul – Israel Aerospace Industries Tamam Division

The quantum compass is an optical passive sensor, utilizes a scattering phenomenon that occurs in the atmosphere and underwater. By sensing the atmospheric light from any location on earth, even from the air downward, the quantum compass can calculate its angle in relation to the celestial body such as the sun or the moon. Since the location of the celestial body is known on the time keeping domain, the compass's heading towards the true north could be defined in real-time manner and without the need for a cold start. The quantum compass operates as an autonomous sextant, sidestepping the need for an unobstructed sightline of the celestial body. The quantum compass provides an absolute position on the NED coordinates, a position line, azimuth heading and a gravity vector sensed by all 3 angles: roll, pitch and yaw.
The integration introduced here of the quantum compass with an Inertial Navigation System (INS) provides the INS Kalman Filter with an accurate and continuous azimuth heading update to the true north, while autonomous calibration takes place on the inertial gyroscopic drift phenomenal. Hence, the integrated INS navigation system with the quantum compass reduces the risk of a gimbal lock event on the NED coordinates and at the same time eliminates the time takes for seeking the azimuth heading to the true north.



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