The development of an experimental Health Monitoring Unit (HMU) for GPS (Global Positioning System) and GLONASS (Russian Global Space Navigation System) is reported. The purpose of the HMU is to provide timely warnings to the navigation users if the satellite navigation systems should not be used for navigation. The monitoring unit is a key element in the integrity channel concept of a civil overlay Navsat to GPS and GLONASS. The most stringent requirements are those of civil aviation: in the nonprecision approach phase horizontal position errors exceeding the 600 m SPE threshold have to be reported within 10 seconds. The concept of the HMU is to use a GPS receiver as well as a GLONASS reveiver in a known location in order to detect large pseudorange errors and to identify the malfunctioning satellites. This means that the station is able to work autonomously. But it will also provide pseudorange errors compatible with the American RTCA SC-159 approach and for a future wide area DGPS (Differential GPS) system.
Experimental Health Monitoring Unit for GPS and GLONASS
1992
5 pages
Report
No indication
English
Global Navigation Systems , Navigation Systems , Global positioning system , Satellite navigation systems , Algorithms , Errors , Integrity , Monitors , Navigation satellites , Position (Location) , Civil aviation , Experimentation , Failure , Navigation , Receivers , Requirements , U.s.s.r. space program , Foreign technology , GLONASS system
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