The new multichannel radiospectrograph ARTEMIS-IV/HECATE, of the University of Athens

We present the new solar radiospectrograph of the University of Athens oper ating at the Thermopylae Station since 1996. Observations cover the frequen cy range from 110 to 688 MHz. The radiospectrograph has a 7-meter parabolic antenna and two receivers operating in parallel. One is a sweep frequency receiver and the other a multichannel acousto-optical receiver. The data ac quisition system consists of a front-end VME based subsystem and a Sun Spar c-5 workstation connected through Ethernet. The two subsystems are operated using the VxWorks real-time package. The daily operation is fully automate d: pointing of the antenna to the sun, starting and stopping the observatio ns at pre-set times, data acquisition, data compression by 'silence suppres sion', and archiving on DAT tapes. The instrument can be used either by its elf to study the onset and evolution of solar radio bursts or in conjunctio n with other instruments including the Nancay Decametric Array and the WIND /WAVES RAD1 and RAD2 low frequency receivers to study associated interplane tary phenomena.