18:50 Ready to open. Some clouds at the Sun set but moustly blue sky. Cart 2 plt 634 on the telescope. 20:05 Ready to go. 20:50 An fk5 star found with no problem using the last night offsets. Again the seeing is very bad from 2.5 - 4.0", 3.5 m telescope observrs reported seeing about 4". The fficiency read from the guider: ~25%. There are thin clouds around, and we are collecting noise, so we decided do postcalib and no smearing. We took 4 science exposures. The sky was too bright for all of them. Only one of these exposures had (S/N)^2 > 2 and this was for only one camera (r2). Son-of-spectro complained about red monsters, whopping fibers, scattered light and large flexure. Again we have problems with "fiducial reading" first time occured: Aug 27 22:34:37 sdssmcp tLatch dsc_I_trcInfo Applying correction 3859286 to azimuth Aug 27 22:34:37 sdssmcp tLatch dsc_E_trcErr correction for azimuth 3859286 is too large Aug 27 22:34:37 sdssmcp tLatch dsc_W_trcWarn Not disabling MS.ON; error 3859286 (max allowed: 600) and later. And we keep ignoring: 0 0 I Received="?GOCORR one or more axes did not end on a full step 0, 0, 0, 0, 1" 22:45 Cart 9 plt 644 on. We didn't find stars with go to field, but we've found quickly fk5 star in a fiber. The seeing is getting better! However wind and its speed remain the same... The efficiency is high over 60%, but we've got very low S/N. Perhaps the sky brightness is too high? We did 5 science exposures for this plate. The sky was too bright for all of them. Three of the exposures had (S/N)^2 > 2 for r2. No usefule data for b2 and r1. Numbers were not available for b1 because son-of-spectro couldn't reduce the arc but it is doubtful any of the data were usable. Son-of spectro again complained about whopping fibers, scattered light and large flexure. 23:30 Thick clouds are comming. 00:30 We stopped exposure and postcalib (needed because we SOP couldn't reduce data in blue 1). 00:40 High humidity- closing.