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Paper: Doppler Shift Correction for 2SB Receivers of the 45m Telescope at the Nobeyama Radio Observatory
Volume: 434, Astronomical Data Analysis Software and Systems XIX
Page: 425
Authors: Takahashi, S.; Takano, S.; Iono, D.; Kuno, N.; Sakai, T.; Horigome, O.; Yanagisawa, K.
Abstract: Two sideband-separating (2SB) receivers (T100H & T100V) have been installed for the 45m telescope at the Nobeyama Radio Observatory (NRO). These new receivers can simultaneously observe in both sidebands (LSB & USB). For Doppler shift correction, the local frequency (Lof) correction method conventionally used in NRO is not suitable for these receivers, because the correction can be applied for only one sideband, and the correction of the other sideband is not accurate. In order to solve this problem, we have developed a new Doppler shift correction method for the 2SB receivers. In this report, we present the software Doppler shift correction method for the 2SB receivers, showing a comparison with the conventional Lof correction method (hardware correction). The software correction would be much superior to the hardware one in several aspects.
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