Immediate prospects of the Siberian Radio Heliograph

Sergey Lesovoi, Institute of Solar Terrestrial Physics

The Siberian Radio Heliograph (SRH) is a 48-antenna T-shaped antenna array that uses Fourier synthesis for imaging the Sun in the 4-8 GHz frequency band. The image cadence of the SRH in single-frequency mode is about 0.2 s. The spectral resolution is 10 MHz and the number of frequency channels recorded sequentially is up to 64. The real time data of the SRH are at website http://badary.iszf.irk.ru/corrPlot.php. In this talk the immediate prospects of the SRH are presented. The new SRH will consist of three T-shaped antenna array for frequency ranges of 3-6, 6-12 and 12-24 GHz with spatial resolution up to 15, 12 and 6 arcsec respectively. The mounts of the new antennas will be alt-azimuth. The antenna array redundancy is provided. RF over fiber architecture will be used for antenna signal transmission. The dual polarization feeds, antenna front-ends, digital receivers and the correlator are described in detail and first results of test observations with new equipment are presented. The 3-6 GHz array should be built at the end of this year, the other two arrays - at the end of next year.