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标题：A new five-wavelength photometer operated in Tromsø (69.6°N, 19.2°E)
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作者：Satonori Nozawa ; Tetsuya Kawabata ; Keisuke Hosokawa 等
期刊名称：Earth, Planets and Space
电子版ISSN：1880-5981
出版年度：2018
卷号：70
期号：1
页码：1-31
DOI：10.1186/s40623-018-0962-x
出版社：Springer Verlag
摘要：A new five-wavelength photometer was developed and installed at the EISCAT Tromsø site (69.6°N, 19.2°E) in January 2017.The photometer consists of two units: an optical unit and a control unit together with a PC.The photometer is capable of simultaneously observing auroral emissions with five wavelengths.A uniqueness of the present system is its capability of precise pointing, which enables pointing the photometer at the field-aligned position using a star image obtained with a coaxial digital camera.Another uniqueness of the system is its capability of taking data at a sampling rate of 400 Hz.Some preliminary results including correlations between 427.8 nm and 557.7 nm, 630 nm, 777.4 nm, and 844.6 nm are presented.These comparisons are not significant unless all of the five wavelength emissions emanated from exactly the same volume (i.e., magnetic zenith) in the ionosphere, which the present system has.
关键词：Auroral emission; Photometer; Field-aligned position; Tromsø