Patent ID: 9086478
Filing Date: 2015-07-21
Classification: G01S

Abstract:
1. A satellite radiolocalization device, comprising: a barometric pressure determination unit configured to determine pressure data inside a pressurized aircraft; a memory configured to store the pressure data; the radiolocalization device configured to detect a pressure pattern of the pressurized aircraft based in part on the stored pressure data, wherein the pressure pattern comprises a plurality of pressure readings over time; wherein the satellite radiolocalization device is configured to estimate a duration of an air travel of the pressurized aircraft based on the pressure pattern, and to determine a position uncertainty based at least in part on the duration; and wherein the satellite radiolocalization device is further configured to determine the position uncertainty based on the presence of said pressure pattern, the pressure pattern indicating (a) a phase of rapid initial pressure drop, (b) a phase of constant pressure, and (c) a phase of rapid pressure increase.