Pseudorange error refers to inaccuracies in the measured distance between a GPS satellite and a receiver, primarily caused by factors such as atmospheric conditions, satellite clock errors, and multipath effects. Correcting these errors is crucial for improving the accuracy and reliability of GPS-based positioning and navigation systems.
Differential GNSS (DGNSS) enhances the accuracy of standard GNSS by using a network of fixed ground-based reference stations to broadcast the difference between the positions indicated by the satellite systems and the known fixed positions. This correction information significantly reduces errors caused by atmospheric conditions, satellite clock drift, and other factors, achieving centimeter-level accuracy suitable for precision applications like surveying and autonomous navigation.
Real-time Kinematic Positioning (RTK) is a satellite navigation technique used to enhance the precision of position data derived from satellite-based positioning systems, such as GPS, by using a fixed reference station to provide real-time corrections. This method allows for centimeter-level accuracy, making it crucial for applications in surveying, agriculture, and autonomous vehicle navigation.
Error sources in Global Navigation Satellite Systems (GNSS) can significantly affect the accuracy and reliability of positioning, navigation, and timing data. These errors arise from a variety of factors including satellite clock inaccuracies, atmospheric conditions, and multipath effects, necessitating the use of correction techniques to enhance precision.
Differential GNSS (DGNSS) enhances the accuracy of standard GNSS by using reference stations to correct satellite signal errors, achieving positional accuracy up to a few centimeters. This is crucial for applications requiring high precision, such as surveying, agriculture, and autonomous vehicles.