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One of the solutions to overcome the problem introduced by larger characteristic parameter variation is to calibrate the characteristics of the system by a known weak signal periodically. The calibration signal can be either a signal from know celestial objects or an artificial signal source build in the telescope system. The disadvantage of the celestial calibration sources is that their orientations...
The development on the 320-420 GHz SIS heterodyne receiver modules for the Submillimeter Array (SMA) of Taiwan is presented in this paper. This newly developed receiver band, along with the existing 250-354 GHz SIS heterodyne receivers, provides dual-polarization observation capability over 320-354 GHz, which cover important C03-2 and HCN5-4 molecular emission lines from the celestial objects. The...
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