Missing data and the accuracy of magnetic-observatory hour means

Annales Geophysicae



Analysis is made of the accuracy of magnetic-observatory hourly means constructed from definitive minute data having missing values (gaps). Bootstrap sampling from different data-gap distributions is used to estimate average errors on hourly means as a function of the number of missing data. Absolute and relative error results are calculated for horizontal-intensity, declination, and vertical-component data collected at high, medium, and low magnetic latitudes. For 90% complete coverage (10% missing data), average (RMS) absolute errors on hourly means are generally less than errors permitted by Intermagnet for minute data. As a rule of thumb, the average relative error for hourly means with 10% missing minute data is approximately equal to 10% of the hourly standard deviation of the source minute data.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Missing data and the accuracy of magnetic-observatory hour means
Series title Annales Geophysicae
DOI 10.5194/angeo-27-3601-2009
Volume 27
Year Published 2009
Language English
Publisher EGU
Contributing office(s) Geologic Hazards Science Center
Description 10 p.
First page 3601
Last page 3610