On the Various Published Formulas to Determine Sensor Offset and Sensor Misalignment for the DI-flux

摘要

An inconsistency regarding the calculation of sensor offset and sensor misalignment for the fluxgate theodolite in the IAGA Guide for Magnetic Measurements and Observatory Practice (Jankowski and Sucksdorff 1996) is discussed and resolved by comparison of the given formulas and examples with the original literature (Kring Lauridsen 1985) and experimental data. An erroneous sign is found on page 99 in formula (5.7) for inclination collimation and formula (5.8) for sensor offset calculated from the declination measurement. Jankowski and Sucksdorff (1996) have the same formulas as Kring Lauridsen (1985), but a different sequence of theodolite positions for the declination measurement led to a confusion of input variables and consequently to the erroneous signs. An electronic version of Kring Lauridsen (1985) is now available on request.