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An inertial navigation system (INS; also inertial guidance system, inertial instrument) is a navigation device that uses motion sensors (accelerometers), rotation sensors and a computer to continuously calculate by dead reckoning the position, the orientation, and the velocity (direction and speed of movement) of a moving object without the ...
Stellar-inertial guidance is used to correct small position and velocity errors that result from launch condition uncertainties due to errors in the submarine navigation system and errors that may have accumulated in the guidance system during the flight due to imperfect instrument calibration.
Minuteman III guidance ring containing the D37D computer. Minuteman III guidance ring on display at the National Air and Space Museum. The D37D Minuteman III flight computer was initially supplied with the LGM-30G missile, as part of the NS-20 navigation system. The NS-20 D37D flight computer is a miniaturized general purpose (serial ...
A guidance system is usually part of a Guidance, navigation and control system, whereas navigation refers to the systems necessary to calculate the current position and orientation based on sensor data like those from compasses, GPS receivers, Loran-C, star trackers, inertial measurement units, altimeters, etc.
See also Inertial navigation system. Astro-inertial guidance is a sensor fusion/information fusion of the Inertial guidance and Celestial navigation. Long-range Navigation (LORAN) : This was the predecessor of GPS and was (and to an extent still is) used primarily in commercial sea transportation.
Apollo Command Module primary guidance system components Apollo Lunar Module primary guidance system components Apollo Inertial Measurement Unit. The Apollo primary guidance, navigation, and control system (PGNCS, pronounced pings) was a self-contained inertial guidance system that allowed Apollo spacecraft to carry out their missions when communications with Earth were interrupted, either as ...
Instead, the inertial navigator provides the guidance information using gyroscopes that indicate direction and accelerometers that measure changes in speed and direction. A computer then uses this information to calculate the vehicle's position and guide it on its course. Enemies could not "jam" the system with false or confusing information.
The LN-4 is a miniature inertial system for "a manned orbital vehicle" [15] The LN-5 is a (1963)"state of the art experimentation astro-inertial system installed in a Convair 340 R4Y ". [16] The LN-7C is the inertial component of the AN/ASN-53 stellar-inertial-Doppler system used on RC-135C aircraft in the late 1960s, early 1970s. [17]