Worldwide Observatory Hourly Means from 1995 to 2003: Investigation of Their Quality

摘要

We examined the hourly mean values from worldwide geomagnetic observatories as available from the World Data Center Cl, Copenhagen, for erroneous or problematic data. A number of outliers and jumps were found, as well as instabilities in baseline control. It is impossible to correct all these data without checking the original values at the individual observatories again. We provide a table of identified problems to alert both users and the data owners about them and encourage each observatory to correct their data where possible.