Definition: Geophysical stations may be part of a hierarchical system. Rank is proportional to the importance of a station
Description: Significance of stations can be very different even for the same geophysical method. Rank maz take the following values: 1stOrderBase, 2ndOrderBase, secularStation, observatory. Base stations are used to tie local measurements to higher level networks. Secular stations are visited from time to time to detect long term temporal changes of physical parameters. Observatories are important facilities that collect data continuously, or on a regular basis.