2026-10-14T06:14:58Z https://www.scidb.cn/oai

10.57760/sciencedb.space.00537 2023-04-04T17:49:20Z

2023-04-04 Figures for manuscript "Intensity Calibration Method for the Mingantu Spectral Radioheliograph Images" doi:10.57760/sciencedb.space.00537 en The files are figures for manuscript "Intensity Calibration Method for the Mingantu Spectral Radioheliograph Images". The radio brightness temperature is an important parameter to describe the solar physical process. It plays a very important role in the study of different radio radiation mechanisms, solar magnetic field and the acceleration of non-thermal electrons in the solar burst process. Therefore the image of radioheliograph must be calibrated for brightness temperature. This paper will introduce a method suitable for radioheliograph image calibration. The solar radio image contains the structure information of the solar disk. The radio radius and intensity of the quiet solar disk in the image can be obtained by fitting the first kind of Bessel function with the visibilities of short baselines of the radioheliograph. Then the calibration factor Gc of the image can be calculated by using Rayleigh-Kings law and solar radio flux, so as to realize the calibration of the MUSER image.  Radioheliograph; Brightness temperature; Calibration; Synthetic aperture zhou zhi chao Chen Linjie Yan Yihua Wang Wei PUBLIC https://creativecommons.org/licenses/by/4.0/ dataset Science Data Bank