Open AccessGeomagnetic lunar analysis—the estimation of errors
Author(s) -
Sellek R.,
Malin S. R. C.
Publication year - 1982
Publication title -
geophysical journal of the royal astronomical society
Language(s) - English
Resource type - Journals
eISSN - 1365-246X
pISSN - 0016-8009
DOI - 10.1111/j.1365-246x.1982.tb05984.x
Subject(s) - earth's magnetic field , standard deviation , geodesy , independence (probability theory) , harmonics , statistics , mathematics , estimation , geology , physics , quantum mechanics , voltage , magnetic field , management , economics
Summary. It has recently been proposed that a reliable estimate of the errors of tidal harmonics present in geomagnetic data can be obtained by the following method: (1) randomly assign each observation to one of 10 subsets, (2) determine the tidal harmonics separately for each subset, and (3) calculate the standard deviation of the mean from the scatter among the 10 determinations. This method is valid if the subsets are statistically independent, but will lead to an underestimate of the errors if they are not. Here we show that, for real geomagnetic data, the assumption of statistical independence is valid.