Initial results of Husafell solar radio spectrograph

Observing the moon surface and subsurface materials using various radio frequencies is very important for investigating the physical properties of the moon. In particular, the frequency dependence of the dielectric constant of surface and subsurface materials provides information on the density profile. Because the dielectric constant is identified by measuring the reflectivity of the radio waves, we attempted to observe direct solar radio bursts in Iceland and reflected solar radio bursts in litate simultaneously. A new solar radio spectrograph to observe solar radio bursts has been installed at Husafell station in Iceland. The spectrograph covers two frequency bands in the ranges of 18 MHz to 38 MHz and 190 MHz to 350 MHz. Since September 2004, several successful observations have been made: 30 events of Type-I, -II, -III, and -IV bursts have been found in data obtained between September 2004 and August 2005. The flux density of the solar radio bursts detected in this study was within the range of 10 to 100s.f.u. We previously confirmed that when strong solar burst phenomena occur in the UHF range, the reflected wave signal from the moon surface can be detected using the litate Planetary Radio Telescope, installed in Japan.