{
  "$type": "site.standard.document",
  "description": "The invention concerns a portable device (10) for determining horizontal and vertical positions. It comprises an altimeter (15) including a pressure sensor calibrated at a predetermined initial altitude, a GPS signal receiver (12) designed to receive through an antenna (11) signals coming from…",
  "path": "/patents/1109928",
  "publishedAt": "2001-09-26T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G01C5/06",
    "ASULAB SA [CH]"
  ],
  "textContent": "The invention concerns a portable device (10) for determining horizontal and vertical positions. It comprises an altimeter (15) including a pressure sensor calibrated at a predetermined initial altitude, a GPS signal receiver (12) designed to receive through an antenna (11) signals coming from several satellites (20) so as to calculate position data of said device, a processing unit (14) receiving the position data of the receiver (12) and an altitude value of the altimeter (15) and means for displaying horizontal and vertical positions of the device treated and supplied by the processing unit. The processing unit sends to the receiver a GPS signal corresponding to the altimeter altitude value calibrated to enable the receiver to determine, from the altitude value, position data of the device. A storage (13) including cartographic data and associated with the GPS receiver (12) can supply accurate data to the processing unit (14) in particular for calibrating the altimeter.",
  "title": "Portable GPS receiver using a barometric altimeter"
}