| 摘要 |
PROBLEM TO BE SOLVED: To provide an azimuthal angle measuring instrument, a rotary angle measuring instrument, an azimuthal angle measuring program, a rotary angle measuring program, a rotary angle measuring program, an azimuthal angle measuring method, and a rotary angle measuring method, for accurately measuring an azimuthal angle independent of the place of measurement and suitable for cost reduction. SOLUTION: Inclination angle data are calculated from triaxial earth magnetism data obtained when the azimuthal angle measuring instrument is set at a known inclination angle and from triaxial earth magnetism data obtained when the instrument is set at an inclination angle for an ordinarily used attitude. The angle data are used to correct an azimuthal angle. COPYRIGHT: (C)2005,JPO&NCIPI
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