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| Paper: |
The Polarization Calibration Model of the New Vacuum Solar Telescope |
| Volume: |
526, Solar Polarization Workshop 8 |
| Page: |
347 |
| Authors: |
Yuan, S.; Hou, J. F.; Wang, D. G.; Ji, K.; Xu, J. |
| Abstract: |
Accurate vector magnetic field diagnostics on the solar photosphere with
high spatial and temporal resolution is the primary scientific goal for
the New Vacuum Solar Telescope. For this, a polarization calibration
procedure should be foreseen to correct for the instrument polarization,
which is mainly caused by the diagonal mirrors in the Coudé train.
Since the installation of the polarization calibration unit into the
telescope, the first calibration observation has been done. A parametric
polarization model of the telescope and a nonlinear least-squares algorithm
are developed for fitting the calibration data.
The results show a 0.02 fitting residual for the cross-talk between Q,
U, and V for the recent stage. |
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