Top part clockwise: representative Stokes I, Q, V, and U profiles (black) from an upflow region. The red lines indicate the result of radiative transfer calculations within the atmosphere plotted below and the dashed vertical lines represent the respective vacuum wavelength of the transition. Bottom part clockwise: temperature, Doppler velocity, zenith angle, and magnetic field strength (black) with errors (shaded gray) at different optical depth values. The dashed lines indicate the temperature stratification in the HSRA model, plasma at rest, and a zenith angle of 90° in the respective panels.
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