頁籤選單縮合
題名 | Observation of the Geocoronal Balmer Alpha with DEFPOS=利用DEFPOS觀測高層大氣之氫原子巴耳摩輻射譜線 |
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作者 | Sahan, Muhittin; Yegingil, Ilhami; Aksaker, Nazim; | 書刊名 | Terrestrial, Atmospheric and Oceanic Sciences |
卷期 | 18:1 2007.03[民96.03] |
頁次 | 頁85-96 |
分類號 | 328.48 |
關鍵詞 | 高層大氣; 氫原子巴耳摩輻射; Geocoronal hydrogen; Techniques and methods; Fabry-Perot spectrometers; |
語文 | 英文(English) |
英文摘要 | Instrumental improvements in sensitivity of Fabry-Perot spectrometers with the development of Charged Coupled Device (CCD) cameras enable measurement of faint emission lines. A Dual Etalon Fabry-Perot Optical Spectrometer (DEFPOS) has recently been built to observe hydrogen Balmer: 6563 A) emission lines from the Earth°Ps upper atmosphere analpha (H the interstellar medium in our Galaxy. This spectrometer is now located at TUBITAK National Observatory (TUG), Antalya, Turkey, and has beenobserving in the zenith direction with a field-of-view of 4.76 and with 1200 sexposure time. This paper briefly describes the DEFPOS spectrometer, data analysis, and results from data taken on 47 nights between 2002 and 2004. For the averaged geocoronal Balmer intensities measured in nighttime, we found that the intensity was generally greater than 1 R and less than 12R. These first results show that there is agreement with the theory and measurements made by other groups regarding the geocoronal Balmer intensities. DEFPOS observations from Turkey offer potential to combine with geocoronal hydrogen observations at other locations such as Arecibo,Puerto Rico, Wisconsin Pine Bluff Observatory (PBO), and WHAM, Kitt Peak, Arizona, enhancing our global knowledge of the upper atmosphere. In the near future, DEFPOS will be used at coude exit of the 150 cm telescope. Then, it will be able to make more accurate observations at any direction in the sky. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。