The feature of optical fiber transmission system and its effect on the solar radio heliograph are analyzed in this article.
分析了光纤传输系统的特性，及其对太阳射电频谱日像仪的影响。
By using data of Nobeyama radio heliograph, we calculate value of magnetic field in lower corona in some active region from thermal bremsstrahlung, and preliminary result has been obtained.
利用Nobeyama射电日像仪的观测资料，以热轫致辐射机制为基础对一些活动区的高层大气磁场进行了估算，得到了一些初步的结果。
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