Sodankylä Ionosonde Geophysical Observatory

 

 

 

The Sodankylä Ionosonde started regular, half-hourly vertical soundings of the ionosphere on 1st August 1957. The observatory's second sounder (IS-14) was taken into operation on 1st February 1977. This sounder was modified later on. A new era of ionospheric vertical soundings began on 16th November 2005 when the new "Alpha Wolf" ionosonde was taken into use, which was built from scratch as a research ionosonde by the observatory during the previous three years. The new instrument performed soundings every 10 min until early April 2007, when 1-min soundings for the IPY began.

For technical details of the ionosondes used in SGO, see Instrument Descriptions. 
 

Sodankylä Geophysical Observatory has been in operation since 1914.
Geomagnetic observations Geomagnetic observations have been carried out regularly since 1914. (Data)
Seismic observations Seismic observations have been carried out at Sodankylä since 28th June 1956. (Data)
Ionosphere soundings The Sodankylä Ionosonde started half-hourly regular vertical soundings of the ionosphere on 1st August 1957. (Data)
Cosmic ray measurements Neutron monitor of the Oulu Cosmic Ray Station has been in routine operation since 1964. (Data)
Riometer observations Riometer observations at Sodankylä began in 1970, and now SGO maintains the whole Finnish Riometer Chain. (Data)
ELF-VLF observation ELF-VLF observations have been carried out only during special campaigns since 1989. (Data)
Pulsation measuremets Pulsation observations at Sodankylä began in 1971. The Finnish Pulsation Magnetometer Chain is operated by SGO since 1999. (Data)
All-Sky Camera Aurora Borealis observations with All-Sky Camera are done since November 2000. (Data)
Ionospheric Tomography The Ionospheric Tomography Chain has been in operation since November 2002. (Data)
Infrasound SGO hosts one of the stations of the Swedish-Finnish Infrasound Network. The station was moved from Uppsala in October 2006. (Data)
 
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