GTRF
The geodetic coordinate system adopted by the Galileo system. 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 […]
Ground speed
Ground speed refers to the velocity of the platform relative to the Earth’s surface.
Ground segment
Ground segment refers to the terrestrial system responsible for maintaining the normal operation of a satellite navigation system. It typically includes the master control station, monitoring stations, and time synchronization/injection stations, as well as the data communication network between them.
GPS
GPS is a global satellite navigation system developed, constructed, and managed by the United States. It provides global users with real-time three-dimensional positioning, velocity, and time information, including services such as Precise Positioning Service (PPS) and Standard Positioning Service (SPS).
GNSS
GNSS stands for Global Navigation Satellite System. It refers to a network of satellites that work together to provide geospatial positioning information, which allows users to determine their exact location on Earth (latitude, longitude, and altitude). GNSS is commonly used in applications like GPS, navigation systems, mapping, and surveying. Some of the most well-known GNSS […]
GLONASS
GLONASS is a global satellite navigation system developed, constructed, and managed by Russia. It provides global users with real-time three-dimensional positioning, velocity, and time information, including services such as Standard Accuracy Channels (CSA) and High Accuracy Channels (CHA).
Geodetic coordinate system
The geodetic coordinate system is a terrestrial coordinate system where the origin is at the center of the reference ellipsoid, the prime meridian and the equatorial plane serve as the reference planes, and the normal to the ellipsoid at a given point is the reference axis. The spatial position of a point is commonly described […]
GBAS
GBAS (Ground-Based Augmentation System) is a system designed to improve the accuracy, integrity, and reliability of GNSS signals, particularly for aviation applications. It provides real-time corrections to GNSS data (such as GPS) to enhance the precision of navigation and position determination. GBAS works by using a network of ground-based reference stations that receive GNSS signals, […]
GALILEO
Galileo is a global satellite navigation system developed, constructed, and managed by the European Union. It provides global users with real-time three-dimensional positioning, velocity, and time information, including services such as open, commercial, safety-of-life, public regulated, and search and rescue support.
Factors Affecting Inertial Navigation Accuracy and Optimization Directions
Factors Affecting Accuracy: Sensor Errors: Accelerometer errors (such as bias, scale factor errors, noise, etc.) and gyroscope errors (such as bias drift, noise, scale factor errors, etc.) are key determinants of the accuracy of inertial navigation systems. Over time, sensor errors accumulate, which impacts the accuracy of position and attitude estimation. System Integration Errors: The […]
