British Geological Survey. 2009 Ascension Island Observatory Monthly Magnetic Bulletin: July 2009. British Geological Survey, 29pp. (Monthly Magnetic Bulletin Series: 09/07/AS) (Unpublished)
Abstract
This bulletin contains the monthly preliminary observatory results, published to meet the needs of all users of geomagnetic data. Magnetic observatory data are presented as a series of plots of one-minute, hourly and daily values, followed by a table of monthly values. The operation of the observatory and presentation of the data are described in the introduction.
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