Enroute
Enroute refers to the airspace designated for aircraft flight, with specified altitude and lateral boundaries, where ground-based or space-based navigation facilities are provided and navigation requirements are imposed on aircraft.
Effective speed
Effective speed refers to the velocity component along the correct flight path.
Drif
In the context of inertial navigation systems (INS), drift refers to the gradual accumulation of error over time, which causes the system’s measurements (like position, velocity, or heading) to gradually become less accurate. Here’s how it works: No external correction: In INS, sensors like accelerometers and gyroscopes are used to calculate things like position and […]
DR
Dead Reckoning is a traditional method of navigation where the position of an aircraft (or any vehicle) is determined by calculating its course, speed, time, and direction from a known position, without relying on external references like landmarks or GPS. It involves using instruments such as a compass, an airspeed indicator, and a clock to […]
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.
