Portable magnetometer theodolite with fluxgate sensor for earth's magnetic field component measurements
Tóm tắt
A new portable magnetometer theodolite with fluxgate sensor has been developed for measuring the components of the earth's magnetic field. With this instrument, used as a null detector, it is possible to make absolute measurements of declination (D) and inclination (I). The compensation of the main magnetic field allows direct intensity measurements (H, X, Y, Z components); in this case the calibration is made by reference to a proton magnetometer. The observation procedure is particularly easy and quick. The accuracy is better than 5 sec of arc forD andI and better than 1 nT for direct intensity measurements.
Tài liệu tham khảo
Meyer, O. und Voppel, D.: 1954, ‘Ein Theodolit zur Messung des erdmagnetischen Feldes mit der Förstersonde als Nullfeldindikator’,Deutsche Hydrographische Z.,7, 73–77/
Serson, P. H. and Hannaford, W. L. W.: 1956, ‘A Portable Electrical Magnetometer’,Can. J. Technol. 34, 232–243.
Trigg, D. F.: 1970,A Portable D and I Magnetometer, Geomagnetic Lab. Report No. 70-3, Earth Phys. Branch, Dept. Energy, Mines and Resources, Ottawa, Canada.