  This study presents a justification of the use of Stokes-V Cryo-NIRSP/DKIST
observations for the 3D Reconstruction of the Coronal Magnetic Field. A
magnetohydrodynamic (MHD) model of the solar corona during solar minimum
generated by Predictive Science Inc. was used to synthesize spectropolarimetric
measurements of the Fe XIII 1075 nm coronal emission line as observed from the
Earth. Stokes-Q,U data is "taken" for half a solar rotation period (about two
weeks) by Upgraded Coronal Multichannel Polarimeter (UCoMP) with field of view
(FOV) up to $2\ R_\odot$. Stokes-V data is "taken" once a day for two days by
Cryo-NIRSP/DKIST with a total FOV equal to the two Cryo-NIRSP FOVs. We
demonstrated that even this amount Stokes-V observations with Cryo-NIRSP FOV
coverage can remarkably improve the 3D coronal magnetic field reconstruction
over an active region compared with tomography reconstruction based only on
UCoMP linear polarization data.
