{
  "$type": "site.standard.document",
  "description": "The device has a global positioning system (GPS) receiver (20) to receive signals and navigation messages from satellites. A memory unit (30) memorizes a measure of altitude of an aircraft. A calibration device (40) estimates variation of the altitude and associated confidence interval (DPV) of the…",
  "path": "/patents/1083609",
  "publishedAt": "2004-09-29T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G01C25/005",
    "THALES SA [FR]"
  ],
  "textContent": "The device has a global positioning system (GPS) receiver (20) to receive signals and navigation messages from satellites. A memory unit (30) memorizes a measure of altitude of an aircraft. A calibration device (40) estimates variation of the altitude and associated confidence interval (DPV) of the aircraft. The receiver, memory unit, and the device (40) co-operate to provide information of absolute altitude and the DPV. Independent claims are also included for the following: (a) a process of navigation aid of an aircraft; (b) an aircraft navigation aiding system having a navigation aiding device; and (c) an aircraft having a navigation aiding system.",
  "title": "Assistance in navigation with increased vertical integrity"
}