{
  "$type": "site.standard.document",
  "description": "Apparatus and associated methods relate to determining altitude of an aircraft during flight based on properties of vortex shedding. A vortex-shedding projection (14) is projected into the airstream adjacent to the exterior surface of the aircraft so as to cause vortex-shedding turbulence (36) of…",
  "path": "/patents/1421929",
  "publishedAt": "2023-08-23T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G01C5/005",
    "ROSEMOUNT AEROSPACE INC [US]"
  ],
  "textContent": "Apparatus and associated methods relate to determining altitude of an aircraft during flight based on properties of vortex shedding. A vortex-shedding projection (14) is projected into the airstream adjacent to the exterior surface of the aircraft so as to cause vortex-shedding turbulence (36) of the airstream. One or more downstream sound-pressure detectors (16A - 16G), which are attached to the exterior surface of the aircraft downstream from the vortex-shedding projection, detect(s) a vortex-shedding frequency f of the vortex-shedding turbulence caused by the vortex-shedding projection. A processor (18) determines the altitude of the aircraft based, at least in part, on the vortex-shedding frequency f of the vortex-shedding turbulence as detected by the one or more downstream sound-pressure detectors.",
  "title": "DETERMINING ALTITUDE OF AN AIRCRAFT DURING FLIGHT BASED ON VORTEX SHEDDING"
}