Читать книгу Global Navigation Satellite Systems, Inertial Navigation, and Integration - Mohinder S. Grewal - Страница 124

This method is generally faster than gyrocompass alignment, but it requires another INS on the host vehicle and it may require special maneuvering of the host vehicle to attain observability of the alignment variables. It is commonly used for in‐air INS alignment for missiles launched from aircraft and for on‐deck INS alignment for aircraft launched from carriers. Alignment of carrier‐launched aircraft may also use the direction of the velocity impulse imparted by the steam catapult.