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 […]
Antenna
In inertial navigation, an antenna typically refers to the device that receives signals from external positioning systems, most commonly Global Navigation Satellite Systems (GNSS), such as GPS, GLONASS, Galileo, or BeiDou. The antenna is crucial for providing absolute position information (latitude, longitude, and altitude) and aiding in the initialization and correction of the inertial navigation […]
Angular Random Walk
Angular Random Walk (ARW) is a type of error that affects gyroscopes and, by extension, inertial navigation systems (INS). It refers to the random fluctuations in the angular velocity measurement provided by a gyroscope, which causes the system’s angular orientation (e.g., roll, pitch, and yaw) to gradually drift over time. Key Characteristics of Angular Random […]
Altitude
In inertial navigation (INS), Altitude refers to the vertical position of an object or device relative to sea level (or a reference datum). It is the measure of the object’s height above the Earth’s surface, typically expressed in meters (m) or feet (ft). Role of Altitude in Inertial Navigation: Part of Positioning Information: In an […]
AHRS
AHRS stands for Attitude and Heading Reference System. It is a type of navigation system that provides the orientation (attitude) and heading (direction) of a vehicle or object relative to a reference frame, typically the Earth’s surface. AHRS is widely used in aerospace, marine, and automotive applications where precise orientation and heading information are critical […]
