| Measurements for the Performance of the Digital Autocorrelation Spectrometer |
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| 引用本文： | Jarken Esimbek. Measurements for the Performance of the Digital Autocorrelation Spectrometer[J]. 中国天文和天体物理学报, 2007, 7(2): 297-303 |
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| 作者姓名： | Jarken Esimbek |
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| 作者单位： | National Astronomical |
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| 基金项目： | 国家自然科学基金;国家自然科学基金 |
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| 摘 要： | Injecting phase calibration (PCAL) signals to the feed horn of the observation sys- tem and analyzing the output response signals of the spectrometer, we measured the working performance of a 4096-channel digital autocalibration spectrometer. The results demonstrate that the spectrometer has a fine working performance: (1) the channels are distributed uni- formly in the spectrometer; (2) line drift produces little effect on the observation results; (3) spectral resolution shows little changes with observation time. The distribution of the fre- quency resolution in an 80 MHz bandwidth was measured. A trial observation on the two molecular spectral lines of H2CO and H110α taken with this spectrometer is described.
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| 关 键 词： | instrumentation: spectrometer—ISM: molecules—radio lines: ISM |
Measurements for the Performance of the Digital Autocorrelation Spectrometer |
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| Fa-Chun Lu,Jarken Esimbek,Jian-Jun Zhou,Xing-Wu Zheng. Measurements for the Performance of the Digital Autocorrelation Spectrometer[J]. Chinese Journal of Astronomy and Astrophysics, 2007, 7(2): 297-303 |
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| Authors: | Fa-Chun Lu Jarken Esimbek Jian-Jun Zhou Xing-Wu Zheng |
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| Affiliation: | [1]National Astronomical Observatories/Urumqi Observatory, Chinese Academy of Sciences, Urumqi830011 [2]Graduate University of Chinese Academy of Sciences, Beijing 100049 [3]Department of Astronomy, Nanjing University, Nanjing 210093 |
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| Abstract: | |
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| Keywords: | instrumentation: spectrometer- ISM: molecules - radio lines: ISM |
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