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DIURNAL CORRECTIONS TO MAGNETIC SURVEYS—AN ASSESSMENT OF ERRORS *
Author(s) -
RIDDIHOUGH R. P.
Publication year - 1971
Publication title -
geophysical prospecting
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.735
H-Index - 79
eISSN - 1365-2478
pISSN - 0016-8025
DOI - 10.1111/j.1365-2478.1971.tb00900.x
Subject(s) - observatory , diurnal temperature variation , telmatology , amplitude , geodesy , base (topology) , magnetic field , base station , remote sensing , regional geology , metamorphic petrology , geology , environmental science , meteorology , physics , atmospheric sciences , hydrogeology , astrophysics , telecommunications , mathematics , optics , computer science , mathematical analysis , geotechnical engineering , quantum mechanics
A bstract The comparison of a group of continuous total field stations in Ireland with the record of the total field from Valentia Observatory enables the errors which would be involved in using the Observatory as a diurnal correction base to be examined. For the most part, for a single correction, these errors lie between ± 2 and ± 6 gammas. However, they have three notable characteristics: (i) they are not closely dependent on the magnetic ‘noisiness’ of the day, (ii) they are only marginally reduced by the application of station‐base time differences and (iii), they are strongly related to differences between the amplitude of the daily magnetic variation at the station and at the base. A permanent geographical basis for the latter differences enables a system for the estimation of the errors to be proposed.