{
  "$type": "site.standard.document",
  "description": "A MEMS gyrocompass and method are provided to mitigate systematic error in determination of a north angle. The MEMS gyrocompass includes one or more MEMS gyroscopes having a sense axis within a reference plane. Samples from an output of the MEMS gyroscope are obtained in at least two angles of…",
  "path": "/patents/1362640",
  "publishedAt": "2024-04-25T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G01C25/00",
    "Murata Manufacturing Co., Ltd."
  ],
  "textContent": "A MEMS gyrocompass and method are provided to mitigate systematic error in determination of a north angle. The MEMS gyrocompass includes one or more MEMS gyroscopes having a sense axis within a reference plane. Samples from an output of the MEMS gyroscope are obtained in at least two angles of rotation about an axis perpendicular to the reference plane. First fit coefficients are determined by fitting samples with first fitting functions determined as function of time. Second fit coefficients are determined by fitting components of earth rotation rate projected on the reference plane based on samples obtained by all the MEMS gyroscopes, which fitting is performed with a second fitting function determined as a function of rotation angle of the MEMS gyroscope with respect to a reference angle. The north angle is determined as an angle between the reference angle and true north based on the second fit coefficients.",
  "title": "MITIGATING SYSTEMATIC ERROR IN GYROCOMPASSING"
}