Abstract
This paper presents the results of the investigation of the residual tropospheric error influence on coordinate determination in a GNSS landing system. The ICAO recommended methodology for residual tropospheric error calculation is taken as a basis for the present research. Special attention is paid to the troposphere refractivity index and troposphere scale height, which are derived from the well-known troposphere refraction MOPS model. A computer simulation is performed for them for the whole year and the northern hemisphere latitudes. Hardware in the loop simulation has been performed to complement the computer simulation study and investigate the situation with the residual tropospheric error calculation for the experimental GNSS satellites configuration. The experimental measurement session with a duration of about 9 hours is recorded to obtain the configuration of real navigation satellites The residual tropospheric error in meters is calculated for each navigation satellite visible during the experiment. The authors investigate the residual tropospheric error influence on the accuracy of the coordinates determined in the GNSS landing system.
Highlights
The Global Navigation Satellite System (GNSS) is a core technology that has led to the development of the Performance Based Navigation (PBN) concept
The International Civil Aviation Organization (ICAO) has adopted the concept of a satellite based landing system of aircraft that involves determining the troposphere correction in a differential mode
The authors have obtained the results of an investigation pertaining to the residual tropospheric error’s influence on the determination of coordinates in the GNSS landing system
Summary
The Global Navigation Satellite System (GNSS) is a core technology that has led to the development of the Performance Based Navigation (PBN) concept. A GBAS ground subsystem typically includes 2–4 reference GNSS receivers, ground processing facilities and a VHF data broadcast (VDB) transmitter The GBAS ground subsystem can simulation part, providing comparison of the residual support all the airborne subsystems within its coverage, tropospheric error in meters for the difference of two altiproviding the aircraft with approach data, corrections, tudes between airborne and ground receivers. The significant differential altitude between the base (ground subsystem) and rover (airborne subsystem) receivers characterizes its implementation for aviation (GBAS).
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