Patent ID: 6798377
Filing Date: 2004-09-28
Classification: G01S

Abstract:
A method for improving a satellite autonomous integrity monitoring (RAIM) availability and fault detection and exclusion (FDE) function by using an adaptive threshold logic; said method comprises the steps of:(A) pre-computing a database of thresholds including multiple sets of thresholds; (B) selecting in real time from said database one set of thresholds, the set comprising a plurality of thresholds corresponding to a set of available measurements; and (C) determining an optimum RAIM/FDE function corresponding to said set of available measurements by using said adaptive threshold logic that utilizes said plurality of thresholds corresponding to said set of available measurements; wherein said set of available measurements is selected from the group consisting of: {a GPS measurement, a GLONASS measurement, a GALILEO measurement, a baro measurement, a clock measurement, and a pseudolite measurement}.