{
  "$type": "site.standard.document",
  "description": "The system (1) has an extended Kalman filter (KE1) comprising an extended state vector with a part representing a gap between a first elementary hybrid solution (PPVl 1) and a second elementary hybrid solution. An extended calculation module (100) receives an extended variance/covariance matrix…",
  "path": "/patents/1014689",
  "publishedAt": "2011-03-23T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G01C21/165",
    "THALES SA [FR]"
  ],
  "textContent": "The system (1) has an extended Kalman filter (KE1) comprising an extended state vector with a part representing a gap between a first elementary hybrid solution (PPVl 1) and a second elementary hybrid solution. An extended calculation module (100) receives an extended variance/covariance matrix (MHYPE1). The module determines a protection radius (RHG1) of the system from the matrix, based on probability of preset false alarm, preset non-integrity level and preset probability of appearance of a non-detected hardware failure of primary and secondary satellite positioning receivers (10, 80).",
  "title": "Hybrid system and apparatus for calculating the position and monitoring the integrity"
}