Daniel K. Inouye Solar Telescope (DKIST) is designed to deliver accurate spectropolarimetric solar data across a wide wavelength range, covering a large field of view simultaneously using multiple facility instruments for solar disk, limb, and coronal observations. We show successful design and implementation of National Solar Observatory Coudé Laboratory Spectropolarimeter, a custom metrology tool for efficient continuous broadband polarization calibration of the telescope mirrors through a coudé laboratory focus. We compare multiple fitting techniques for the 10 to >140 variable DKIST system polarization models. We compare results with the first DKIST solar calibration observations and find small thermally forced retardance changes of ±0.2 deg and ±0.5 deg for two separate SiO2 retarders. Modulation matrices derived are stable to < ± 0.01 per element during the first on-Sun calibration tests. We achieve good fit agreement to our metrology-based model over a 390- to 1600-nm bandpass. The solutions are robust and efficient using only 10 input Stokes vectors from elliptical calibration retarders. We developed a custom polarizer assembly used with metrology tools to orient the DKIST polarization coordinates to better than 0.1-deg clocking angle.

中文翻译：

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Daniel K. Inouye太阳望远镜的偏振建模和预测，第7部分：初步NCSP系统校准和模型拟合

Daniel K. Inouye太阳望远镜（DKIST）旨在使用多种用于太阳盘，四肢和日冕观测的仪器同时在宽波长范围内提供准确的光谱偏振太阳数据，同时涵盖大视野。我们展示了国家太阳能天文台Coudé实验室光谱旋光仪的成功设计和实现，该仪器是一种定制的计量工具，可通过coudé实验室重点对望远镜镜进行高效连续宽带偏振校准。我们比较了10种到> 140种可变DKIST系统极化模型的多种拟合技术。我们将结果与第一个DKIST太阳校准观测结果进行了比较，发现两种单独的SiO2阻滞剂的热强迫延迟变化很小，分别为±0.2度和±0.5度。导出的调制矩阵稳定在<±0。在首次Sun校准测试中，每个元素01。在390至1600 nm的带通上，我们达到了基于计量模型的良好拟合协议。仅使用来自椭圆校准延迟器的10个输入Stokes向量，该解决方案既可靠又有效。我们开发了与计量工具一起使用的定制偏振器组件，以将DKIST偏振坐标定向为优于0.1度的时钟角。