The CALLISTO spectrometer is a programmable heterodyne receiver built in the framework of IHY2007 and ISWI
Radio and Plasma Physics Group (PI Christian Monstein) at ETH Zurich, Switzerland. The main applications are
observation of solar radio bursts and rfi-monitoring for astronomical science, education and outreach. This
product provides access to a world-wide collection of such spectrometers, called the eCallisto network. The
product includes RAW data and quicklook images.
Many CALLISTO instruments have already been deployed, including: 5 spectrometers in India (2 in Ooty, 1 in
Gauribidanur, 1 in Pune, 1 in Ahmedabad), 1 in Badary near Irkutsk, Russian Federation, 2 in South
Korea, 3 Australia (Perth, Melbourne and Heathcote), 2 in Hawaii, 2 in Mexico, 1 in Costa Rica,
2 in Brazil, 3 in Mauritius, 5 in Ireland, 1 in Czech Republic, 2 in Mongolia, 4 in Germany,
2 in Alaska, 2 in Kazakhstan, 1 in Cairo, 1 in Nairobi, 1 in Sri Lanka, 3 in Trieste, 1 in
Hurbanovo/Slovakia, 2 in Belgium, 2 in Finland, 8 in Switzerland, 1 in Sardinia, 4 in Spain, 5 in
Malaysia, 3 in Indonesia, 1 in Scotland/UK 1 in Roztoky/Slovakia, 1 in Peru, 1 in Rwanda, 1 in
Pakistan, 2 in Denmark, 1 in Japan, 1 in South Africa, 2 in Greenland, 2 in Austria and 1 in
Uruguay. Through the IHY/UNBSSI and ISWI instrument deployment program, CALLISTO is able to continuously
observe the solar radio spectrum for 24h per day throughout the year. All Callisto spectrometers together
form the e-Callisto network. Callisto in addition is dedicated to radio-monitoring within its frequency
range with 13,200 channels per spectrum. The frequency range can be expanded to any range by switching-in a
heterodyne up- or a down-converter.
Instrument deployment including education and training of observers was financially supported by SNF, SSAA
(Swiss Society for Astrophysics and Astronomy), NASA, Institute for Astronomy and North-South Center of ETH Zurich and a few private sponsors.
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