The different optical paths followed by the signals coming from a constellation of GNSS (Global Navigation satellite systems; GPS, Galileo, etc) satellites are...
GRIS (GREGOR Infrared Spectrograph), the grating spectrograph is installed in the 1.5-meter GREGOR telescope located at the Observatorio del Teide in Tenerife...
The HERMES high-resolution spectrograph project aims at exploiting the specific potential of small but flexible telescopes in observational astrophysics. The...