Location: Tatranská Lomnica, Slovakia
Owner: Astronomical Institute of the Slovak Academy of Sciences (AISAS)
Solar observations at Lomnický Štít Observatory (LSO) are carried out by the Astronomical Institute of the Slovak Academy of Sciences (Slovakia). The construction of the observatory on the Lomnický Štít (2633 meters above sea level) was initiated by the world-wide activity of the International Geophysical Year 1957 and was realized in the period 1957-1962. The first ZEISS 200/3000/4000 coronagraph was installed at the observatory in 1962. It was used for regular observations of prominences. Observations of coronal emission lines, using a diffraction grating spectrograph, begun in 1964. In 1970 an identical coronagraph was installed on the same mount.
The measurements taken at Lomnický Štít Observatory were mainly used to prepare two long-term data sets of the solar coronal activity. "The Homogeneous Data Set of the Green Coronal Emission Line Intensities" is compiled from the data of all coronal stations over the world since 1939 including the Lomnický Štít Observatory. "The Green Coronal Index" is prepared on the basis of the previous data set for the Sun-as-a-star. "The Catalogue of Solar H-alpha Prominences" has been prepared using measurements performed at the Lomnický Štít Observatory itself. Since 2009 it is extended using observations from the Kanzelhöhe Solar Observatory (Austria).
In 2011 and 2016, the Coronal Multi-Channel Polarimeter (CoMP-S) and the Solar Chromospheric Detector (SCD), two instruments developed by the High Altitude Observatory of NCAR (Boulder, CO, USA), were installed on the coronagraphs. Both instruments use a tunable Lyot-type filter with a polarimeter for spectro-polarimetric observations of coronal and chromospheric structures.