Sammenlign metoder

	GNSS RTK	Attitude Heading Reference System (AHRS)	Bestikregning
Fagområde	Luft- og rumfart	Luft- og rumfart	Luft- og rumfart
Familie	Process / pipeline	Process / pipeline	Process / pipeline
Oprindelsesår	1980s	1940s	1940s
Ophavsperson	GPS constellation	Aviation heritage	Maritime navigation tradition
Type	Positioning method	System	Navigation method
Oprindelig kilde	Teunissen, P. J. G., & Kleusberg, A. (Eds.). (2003). GPS for Geodesy (2nd ed.). Springer-Verlag.	Savage, P. G. (2007). Strapdown Inertial Integration Technology (2nd ed.). Strapdown Associates.	Savage, P. G. (2007). Strapdown Inertial Integration Technology (2nd ed.). Strapdown Associates.
Aliasser	RTK, Real-Time Kinematic positioning, GNSS-RTK, differential GNSS	AHRS system, attitude reference, heading sensor	ded reckoning, inertial navigation, odometry
Relaterede	3	3	3
Resumé	Global Navigation Satellite System Real-Time Kinematic (GNSS RTK) is a high-precision positioning technique that uses carrier phase measurements from a reference receiver at a known location to correct the position estimates of a rover receiver in real time. Developed in the 1980s, RTK exploits spatial correlation of atmospheric errors to achieve centimeter-level accuracy within tens of kilometers of the reference station. RTK is now standard in surveying, construction, autonomous vehicles, and precision agriculture.	An Attitude Heading Reference System (AHRS) is a complete inertial navigation subsystem that estimates and outputs the three-dimensional orientation (attitude) and heading of a vehicle or platform. AHRS combines measurements from accelerometers, gyroscopes, and often magnetometers through sensor fusion algorithms (typically Kalman filters or complementary filters) to provide a drift-free, fast attitude estimate. AHRS is standard in aviation, marine navigation, and modern autonomous systems.	Dead Reckoning is a fundamental navigation method that estimates position and heading by integrating velocity and angular rate measurements from inertial sensors over time, without external references such as GPS. The term derives from maritime tradition ('deduced reckoning') and remains a cornerstone of aerospace and autonomous vehicle navigation. Dead reckoning works reliably in GPS-denied environments and is the baseline navigation method when external navigation aids are unavailable.