Cumulative Error
In the context of gyroscopes, accelerometers, and inertial navigation systems (INS), Cumulative Error refers to the growing error that builds up over time due to small inaccuracies in the measurements of these sensors. Here’s how it works: Gyroscope and Accelerometer Measurements: Gyroscopes measure rotation (how much the system turns). Accelerometers measure acceleration (how fast the […]
Course correction angle
The Course Correction Angle refers to the angular difference between the current heading and the desired course. The Course Correction Angle (also known as the Course Adjustment Angle) is the angle that needs to be applied to an aircraft’s current heading to correct for navigational errors or deviations from the desired flight path. It is […]
Course
The term course in navigation refers to the intended direction of travel or the path along which a vehicle, vessel, or aircraft is headed, usually expressed in terms of an angle or bearing relative to a fixed reference (like true north or magnetic north). Key Points: 1. Course vs. Heading: Course is the planned direction […]
Compatibility
Compatibility refers to the ability to ensure that various satellite navigation systems and augmentation systems do not cause unacceptable interference and do not have harmful effects on individual independent systems or services.
CGCS2000
The geodetic coordinate system established by China. The origin of its coordinate system is located at the Earth’s center of mass, with the Z-axis pointing towards the Geodetic Earth Pole (CTP) defined by the International Time Bureau (BIH) 1984.0 reference epoch, the X-axis pointing towards the intersection of the Greenwich Prime Meridian (BIH 1984.0) and […]
BDS
The satellite navigation system developed, constructed, and managed by China, which provides users with real-time three-dimensional positioning, velocity, and time information, including services such as public, authorized, and short message communication.
AUV
AUV stands for Autonomous Underwater Vehicle, which is an unmanned, robot-like device designed to operate underwater without direct human control. AUVs are typically used for scientific research, military applications, and commercial purposes like offshore oil and gas exploration, mapping the ocean floor, environmental monitoring, and underwater inspections. Key features of AUVs: Autonomous Operation: AUVs can […]
Attitude Accuracy
Attitude Accuracy: Refers to the difference between the estimated attitude (pitch, roll, and yaw angles) and the true attitude. Attitude accuracy is closely related to heading accuracy and the quality of the accelerometers and gyroscopes. Attitude Accuracy is typically expressed in degrees (°).
Attitude
In the context of inertial navigation, attitude refers to the orientation or position of an object relative to a reference frame, typically the Earth or a local coordinate system. It is defined by the object’s roll, pitch, and yaw angles, which describe its orientation in three-dimensional space. Key Aspects of Attitude in Inertial Navigation: Attitude […]
Antenna Boresight
Antenna boresight refers to the reference direction in which an antenna is aligned to maximize its signal reception or transmission. It is the central axis of the antenna’s sensitivity and is typically the direction in which the antenna is oriented for optimal performance, such as receiving signals from satellites or other external sources in navigation […]
