Ground-Based STP Instruments
Details are given here of known ground-based instruments for STP worldwide.-  A JavaScript application for browsing the instrument database via
                    an interactive map.
                    
- A list of all known ground-based observing stations and associated explanatory tables.
- Maps of Magnetometer stations with information about each station.
- Maps of Ionosondes and Riometers with information about each station.
- Groups of ground-based instruments
