10-antenna model of radioheliograph on the basis of the siberian solar radio telescope

We have started modernizing the Siberian Solar Radio Telescope (SSRT [1, 2]) into the Multiwave Radiohelyograph. This radiohelyograph will be applied to measure coronal magnetic fields, determine locations of solar-flare energy release, and examine coronal mass ejections. These tasks set rather strict requirements on parameters of next-generation radiohelyographs. High spatial resolution, high rate of obtaining images and high sensitivity are required simultaneously. All these parameters should be realized in as wide frequency range as possible (from fractions to tens of GHz). Anticipated parameters of the future SSRT-base radiohelyograph are listed below: • ·spatial resolution - 12…24′′, • ·time resolution - 0.02…1.0 с, • frequency range - 4…8 GHz, • sensitivity - up to 100 K, • polarization - left-hand circular and right-hand circular, • data flow - 0.5…20 MB/s (normal and flare regimes). In this paper, we describe broad-band antennas, analog optical data-transmission lines, and correlator, which are used in the 10-antanna radiohelyograph model.