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6 July 2018 Analysis of total station real-time atmospheric correction model in FAST measurement
Benning Song, Lichun Zhu, Dongjun Yu, Baoqing Zhao
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Proceedings Volume 10700, Ground-based and Airborne Telescopes VII; 107002F (2018) https://doi.org/10.1117/12.2312152
Event: SPIE Astronomical Telescopes + Instrumentation, 2018, Austin, Texas, United States
Abstract
As the most important feedback source of the FAST telescope control system, the measurement system directly determines the overall performance and observing efficiency of FAST. High-precision total station measurement equipment is used in real-time measurement of the FAST reflector and the feed cabin. Because the measurement accuracy of total station is easily influenced by the atmospheric environment, in this paper, we established the distribution model of temperature, humidity and pressure through the meteorological information collected by the weather stations evenly distributed in the reflector. We analyzed the changes of atmospheric environment caused by FAST topography and calculated the real-time atmospheric correction at each location within the coverage of the weather station based on the formula. Finally, according to the variation of the atmospheric correction value in the measurement path, the optimal atmospheric correction parameter of the path is obtained, so as to improve the measurement accuracy of the FAST reflector.
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Benning Song, Lichun Zhu, Dongjun Yu, and Baoqing Zhao "Analysis of total station real-time atmospheric correction model in FAST measurement", Proc. SPIE 10700, Ground-based and Airborne Telescopes VII, 107002F (6 July 2018); https://doi.org/10.1117/12.2312152
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KEYWORDS
Atmospheric corrections
Distance measurement
Atmospheric modeling
Precision measurement
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