POlarization Emission of Millimeter Activity at the Sun, El Leoncito National Park

The POlarization Emission of Millimeter Activity at the Sun is a solar patrol system composed of two radio telescopes with superheterodyne circular polarization receivers at 45 and 90 GHz. Since their half power beam width is around 1.4°, they observe the full sun. The acquisition system allows to gather 100 values per second at both frequencies and polarizations, with a sensitivity of around 20 solar flux units. The telescope saw first light in November 2011, and showed excellent performance during two years, when it observed many flares. Since November 2013 is stopped for repairing. The main interest of POEMAS is the observation of solar flares in a frequency range where there are very few detectors and fill the gap between microwaves observed with the Radio Solar Telescope Network and submillimeter observations of the Solar Submillimeter Telescope. Moreover, POEMAS is the only current telescope capable of carrying on circular polarization solar flare observations at 90 GHz.. ()