Abstract
The demand for higher precision measurements in Very Long Baseline Interferometry (VLBI) continues to grow, which drives the technical development of next-generation international VLBI stations called the VLBI Global Observing System (VGOS). We have measured the noise temperature of the wideband receiving system for Shanghai VGOS telescopes by generally the Y-factor method, which is to place the hot load in front of the feed then to let the system point to the cold sky. Shanghai VGOS telescopes, with a diameter of 13.2 m, works in the 3–18 GHz range with dual-linear polarization and is based on the ring focus reflector principle. Removing signal interference points, in the whole broadband range, the noise temperature of the receiver system is lower than 40 k.
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Acknowledgements
This work was supported by National Key R&D Program of China (No. 2018YFA0404702), the National Natural Science Foundation of China (Grant No. A030802, Y847071001, and Y847071002) and CAS Key Technology Talent Program.
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Sun, Z.X., Wang, J.Q., Wang, G.L. (2020). Antenna Noise Temperature of the Feed System for Shanghai VGOS Radio Telescope. In: Patnaik, S., Wang, J., Yu, Z., Dey, N. (eds) Recent Developments in Mechatronics and Intelligent Robotics. ICMIR 2019. Advances in Intelligent Systems and Computing, vol 1060. Springer, Singapore. https://doi.org/10.1007/978-981-15-0238-5_58
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DOI: https://doi.org/10.1007/978-981-15-0238-5_58
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