Mars was tracked using the SCUBA map16 method, with the empirical corrections left enabled, from :

• (az,el) = (120/31) at 00:20 HST to (131/42) at 01:20

The azimuth residuals show a slight (2"), narrow residual at azimuth 125, which is on the 'early-azimuth' side of the defect. This implies that the current version of TEL_EMPIRICAL.DAT, which has a peak-to-peak amplitude of about 17.8", overcompensates for the defect on that side, by about 2"/cos(37) = 2.5" at the horizon. Otherwise the scatter in both daz and del is about 0.8" which is precisely the seeing reported at that time.

It is probably not necessary to change TEL_EMPIRICAL.DAT on this basis. The new data are added to the collection .