Abstract
We present the dependence of the intensity in the sodium D1 and D2 lines on the planetary phase and position on the disk. Theoretical intensities are convolved with an atmospheric point spread function with FWHM of 0″.5 and 2″.0 for planetary phases 60° and 90°. We show that although the absolute intensities are extremely dependent on seeing, the I(D2)/I(D1) ratio remains a reliable indicator of column abundance regardless of the seeing function. For a uniform distribution of sodium, limb brightening will be apparent for a seeing disk with FWHM of 0″.5 but will not be apparent for a FWHM of 2″.0.
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