Calibration of the solar radio spectrometer  

作　　者：TAN ChengMing YAN YiHua TAN BaoLin XU GuiRong 

机构地区：[1]Key Laboratory of Solar Activity,National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100012,China [2]Institute of Heavy Rain,China Meteorological Administration,Wuhan 430074,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2009年第11期1760-1764,共5页中国科学：物理学、力学、天文学（英文版）

基　　金：Supported by the CAS-NSFC Key Project (Grant No. 10778605);the National Natural Science Foundation of China (Grant Nos. 10733020,10843002, and 10873021);the MOST (Grant No. 2006CB806301);the Young Researcher Grant of National Astronomical Observatories, CAS;the Heavy Rain Research Open Project of IHR, CMA (Grant No. IHR2007G01)

摘　　要：This paper shows some improvements and new results of calibration of Chinese solar radio spectrometer by analyzing the daily calibration data recorded in the period of 1997-2007. First, the calibration coefficient is fitted for three bands (1.0-2.0 GHz, 2.6-3.8 GHz, 5.2-7.6 GHz) of the spectrometer by using the moving-average method confined by the property of the daily calibration data. By this calibration coefficient, the standard deviation of the calibration result was less than 10 sfu for 95% frequencies of 2.6-3.8 GHz band in 2003. This result is better than that calibrated with the constant coefficient. Second, the calibration coefficient is found in good correlation with local air temperature for most frequencies of 2.6-3.8 GHz band. Moreover, these results are helpful in the research of the quiet solar radio emission.This paper shows some improvements and new results of calibration of Chinese solar radio spectrometer by analyzing the daily calibration data recorded in the period of 1997–2007. First, the calibration coefficient is fitted for three bands (1.0–2.0 GHz, 2.6–3.8 GHz, 5.2–7.6 GHz) of the spectrometer by using the moving-average method confined by the property of the daily calibration data. By this calibration coefficient, the standard deviation of the calibration result was less than 10 sfu for 95% frequencies of 2.6–3.8 GHz band in 2003. This result is better than that calibrated with the constant coefficient. Second, the calibration coefficient is found in good correlation with local air temperature for most frequencies of 2.6–3.8 GHz band. Moreover, these results are helpful in the research of the quiet solar radio emission.

关 键 词：SOLAR RADIO SPECTROMETER CALIBRATION COEFFICIENT moving-average air temperature CORRELATION 

分 类 号：P182.2[天文地球—天文学]