1.
GEON: The Geosciences Network [GEON]
The Geosciences Network (GEON) portal provides access to geoscience data and
tools. The portal accommodates national and international research activities.
Recognizing this potential, the U.S. Geological ...
3.
USGS Geomagnetic Field Calculator [Geomag_Field_Calc]
The magnetic-field models used in the on-line calculator are succinct
mathematical descriptions of the Earth's surficial magnetic field. They are
constructed by fitting a set of basis functions, usually ...