Observational solar physics is entering a new era with the advent of new 1.5 m class telescopes with adaptive optics, as well as the Daniel K. Inouye 4 m telescope which will become operational in 2019. Major outstanding problems in solar physics all relate to the solar magnetic field. Spectropolarimetry offers the best, and sometimes only, method for accurate measurements of the magnetic field. In this paper we highlight how certain atomic transitions can help us provide both calibration data, as well as diagnostic information on solar magnetic fields, in the presence of residual image distortions through the atmosphere close to, but not at the diffraction limits of large and polarizing telescopes. Particularly useful are spectral lines of neutrals and singly charged ions of iron and other complex atoms. As a proof-of-concept, we explore atomic transitions that might be used to study magnetic fields without the need for an explicit calibration sequence, offering practical solutions to the difficult challenges of calibrating the next generation of solar spectropolarimetric telescopes. Suggestions for additional work on atomic theory and measurements, particularly at infrared wavelengths, are given. There is some promise for continued symbiotic advances between solar physics and atomic physics.
Note concerning a high spectral resolution slicer for imaging spectro-polarimetry with the new generation Multichannel Subtractive Double Pass (MSDP) onboard the future EST telescope
Solar Radio Spectro-polarimetry (50-500 MHz) : Design and Development of Cross-Polarized Log-Periodic Dipole antenna and configuration of receiver system
Spectro-polarimetry of HAbitable Planet Earth (SHAPE) on Chandrayaan-3: Instrument characteristics, calibration and onboard performance
Space Astronomy Group, ISITE-Campus, U. R. Rao Satellite Centre（空间天文组，ISITE校园，U.R. Rao卫星中心）；U. R. Rao Satellite Centre（U.R. Rao卫星中心）；Laboratory for Electro-Optics Systems（光电系统实验室）
KU Leuven（荷语鲁汶大学）；Central Michigan University（中密歇根大学）；Aix-Marseille Univ.（艾克斯-马赛大学）；Newcastle University（纽卡斯尔大学）；Institute of Science and Technology Austria (ISTA)（奥地利科学技术研究院）；Center for Astrophysics | Harvard & Smithsonian（哈佛史密森尼天体物理中心）；Université de Moncton（蒙克顿大学）；DTU Space, Technical University of Denmark（丹麦技术大学空间研究所）；Université Paris-Saclay（巴黎萨克雷大学）；Université de Liège（列日大学）；Observatoire de Paris, Université PSL（巴黎天文台，巴黎文理研究大学）；Université de Toulouse（图卢兹大学）；University of Delaware（特拉华大学）
