Open Access

Table 1

The coordinates of observatories Clementinum and Greenwich according to information on the web page of the International Service of Geomagnetic Indices. The geomagnetic latitude and longitude are the corrected geomagnetic coordinates referred to epoch 2015.5.

Coordinates Clementinum Greenwich
Geographic Latitude 50.08° N 51.48° N
Longitude 14.42° E 00.00° E
Geomagnetic Latitude 49.42° N 53.18° N
Longitude 98.50° E 84.96° E
Altitude 200 m 50 m

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