This study presents the results of a quantitative analysis of IRmag ( infrared Stokes spectro-polarimeter , National Astronomical Observatory of Japan, (NAOJ)/Mitaka) observations in three spectral lines Fe i 1564.8 nm, Si i 1082.72 nm, He i 1083.0 nm, and comparison between IRmag magnetograms and ones from the Solar Dynamic Observatory/Helioseismic and Magnetic Imager (SDO/HMI), Global Oscillation Network Group (GONG), Wilcox Solar Observatory (WSO), and Solar Telescope for Operative Predictions (STOP). It is shown that there is a good correlation between observations in all three IRmag spectral lines, but with significant differences in the measured field strengths caused by different depths of formation and, probably, by calibration issues. The correlation of IRmag magnetograms with ones from other observatories, and between different observatories among each other, is as good as 0.70 – 0.95, depending on the combination, but nevertheless there are significant systematic differences (linear-regression coefficients deviating from unity) between different data sets (up to a factor of three or even more).

中文翻译：

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日本国家天文台红外光谱偏振计 IRmag 观测到的大规模太阳磁场：不同光谱线和天文台测量结果的比较

本研究介绍了 IRmag（红外斯托克斯光谱偏振计，日本国家天文台，（NAOJ）/三鹰）在三个谱线 Fe i 1564.8 nm、Si i 1082.72 nm、He i 1083.0 nm、 IRmag 磁力图与来自太阳动态天文台/日震和磁成像仪 (SDO/HMI)、全球振荡网络组 (GONG)、威尔科克斯太阳天文台 (WSO) 和用于操作预测的太阳望远镜 (STOP) 的磁力图之间的比较。结果表明，所有三个 IRmag 谱线的观测值之间存在良好的相关性，但由于不同地层深度和可能由校准问题引起的测量场强存在显着差异。IRmag 磁力图与其他天文台的磁力图的相关性，