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Determining the astronomical refraction and building the radio wave refractive delay model measured (II) - Using Hipparcos Catalogue as working catalogue
Yang, Lei; Tie, Qiong-Xian; Li, Bin-Hua +2 more
Demands on the working catalogue when determining the astronomical refraction and influences of systematic error of the catalogue are related. And the systematic error of the FK5 with respect to Hipparcos Catalogue is put forward so as to explain why all the earlier star catalogues are inapplicable to refraction measurement. The characteristic of …
Primary research on a complex solar radio burst and its characteristics of microwave sources
Wang, Min; Wang, Kun-Shan; Xie, Rui-Xiang +4 more
A very complex outstanding solar radio burst was observed with the wide-band spectrometer of NAOC on October 19, 2001. This burst was characterized by a broader band (decameter to decimeter) burst followed by a more intense narrow-band burst at the lower frequencies (decimetric). NoRH (Nobeyama Radio Heliograph) observations about this event at 17…