Receiver Autonomous Integrity Monitoring (detection of erroneous satnav data via comparing multiple navigation solutions).

Receiver Autonomous Integrity Monitoring. A software algorithm that performs an assessment of satellite(s) health (signals in/out of tolerance) done within the receiver; depending solely on the GPS signals available without augmentation from another system.

Receiver Autonomous Integrity Monitoring - Technology added to aviation GPS used to detect questionable data from one or more satellites. It works by over-determining position using at least five satellites or four satellites and a barometric altitude input.

Receiver Autonomous Integrity Monitoring. A form of receiver self-checking in which redundant pseudo-range observations are used to detect if there is a problem or "failure" with any of the measurements -- only four measurements are needed to derive 3-D coordinates and the receiver clock error, hence any extra measurements can be used for checking. Once the failed measurements have been identified they may be eliminated from the navigation fix. RAIM is a concept that has been introduced by aviation users who are concerned that GPS does not have the level of Integrity necessary for non-precision airport approaches or GPS-aided landing.

RAIM is the abbreviation for Receiver Autonomous Integrity Monitoring, a technology developed to assess the integrity of Global Positioning System (GPS) signals in a GPS receiver system. It is of special importance in safety-critical GPS applications, such as in aviation or marine navigation.