Authors: K. Takefuji, T. Kondo, H. Ujihara, M. Sekido
Journal: Transactions of IAA RAS vol. 41
Pages: 127 - 130
Keywords: VLBI, VGOS
We have been developing broadband system for time and frequency transfer by VLBI technique. Currently, two compact antennas (1.6 meter and 2.4 meter, so-called MARBLE) have been installed to Japanese time keeping institutes. One is installed to AIST in Tsukuba and other is to the headquarter of NICT in Tokyo. Since our MARBLEs are too small to get fringes, broadband receiving system of VGOS is required to get higher SNR and a large dish like Kashima 34 meter is required to obtain fringes with MARBLEs. Thus, we installed a broadband system including a new feed, so-called NINJA, to Kashima 34 meter. We report the progress of our development and recent results of broadband VLBI experiments in a frequency range of 3.2 GHz to 14 GHz.