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An inertial measurement unit (IMU) is an electronic device that measures and reports a body's specific force, angular rate, and sometimes the orientation of the body, using a combination of accelerometers, gyroscopes, and sometimes magnetometers. When the magnetometer is included, IMUs are referred to as IMMUs.
In 2011, GPS jamming at the civilian level became a governmental concern. [11] The relative ease in ability to jam these systems has motivated the military to reduce navigation dependence on GPS technology. [12] Because inertial navigation sensors do not depend on radio signals unlike GPS, they cannot be jammed. [13]
Flight line maintenance of the LN-3, like systemchecks and fault isolation, was performed using specific test equipment : System Test Console with Adapter and Computer, and Platform on pedestal at Volkel, NL. MATS (mobile automated test system) (RNlAF operated the MATS not at flightline but shop level.) Line test analyzer; Gyro bias test set
Today's complex systems use multiple approaches to determine current position. For example, today's most advanced navigation systems are embodied within the Anti-ballistic missile, the RIM-161 Standard Missile 3 leverages GPS, IMU and ground segment data in the boost phase and relative position data for intercept targeting. Complex systems ...
GPS/INS is commonly used on aircraft for navigation purposes. Using GPS/INS allows for smoother position and velocity estimates that can be provided at a sampling rate faster than the GPS receiver. This also allows for accurate estimation of the aircraft attitude (roll, pitch, and yaw) [citation needed] angles.
The test statistic used is a function of the pseudorange measurement residual (the difference between the expected measurement and the observed measurement) and the amount of redundancy. The test statistic is compared with a threshold value, which is determined based on the required probability of false alarm (Pfa).
Miniature inertial measurement unit (MIMU) is an inertial measurement unit (IMU) developed and built by Honeywell International [2] to control and stabilize spacecraft during mission operations. MIMUs can also be configured to perform as an inertial reference unit (IRU).
The AN/PSN-13 Defense Advanced GPS Receiver (DAGR; colloquially, "dagger") is a handheld GPS receiver used by the United States Department of Defense and select foreign military services. It is a military-grade, dual-frequency receiver, and has the security hardware necessary to decode the encrypted P(Y)-code GPS signals .