Global Geomagnetic Observatory Data from the British Geological Survey
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下载链接：
https://cmr.earthdata.nasa.gov/search/concepts/C1214595264-SCIOPS.html
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资源简介：
This dataset contains geomagnetic activity indices held by the British
Geological Survey. The dataset has global coverage and is currently
active, being updated as records are obtained. The database is stored
on-line on a VAX system, with an on-line search mechanism available;
printed data compilations are also available. The database is open to
all users, but with some restrictions. Fees are charged for the use.
提供机构：
SCIOPS
