Feb 2 1996

11:30 AM Noticed a vertical shift in sample
         at same position as viewed from position 1 and 6
         Tried taking images from camera position 1, moving
         camera then returning camera to position 1 and
         taking another picture. A large vertical shift
         was noticed (about 10-20 pixels). 
         Tried taking a picture and and shaking the 
          tripod while it remained in position holders...
         a vertical shift was noticed again. Did the
         same test but with tripod out of holders
         ... again a vertical shift was noticed although
         it was a smaller vertical shift.
         Don't have a solution for this instability... will continue

12:30    Changing grid to a metal plate so that the center
         can be determined exaclty and the 
         sample calibration can run automatically, without
         checking that the photometer is  looking at the center.

2:00PM   starting sampl1, setting diaphragm

2:15PM   noticed light was dim.. bulb had melted trying halogen lamp

2:20PM   repeating daily calibration 

         voltage = 11.95

2:53PM   completed gray card 16 pictures (179 was last picture)
         at 15 sec 1 cycle integration time

2:53PM   starting gray strip calibration
         changed integration time to 5 sec 1 cycle because of overload
         at nr 4 to 10 sec, 1 cycle
         at nr 7 to 20 sec. 1 cycle
         at nr 10  to automatic, it took 60 seconds
         at nr 11  to 40 sec, 1 cycle
         at nr 14 i got low signal but saved anyway
         at nr 15 to automatic
         at nr 16 50 seconds gave low signal saved anyway to file number 199
         from nr 17-19 also gave low signal saved anyway
         measurement from nr 18 repeeated because paper was slightly off
         base causing a specularity (repeated measurement in 203-02.feb)
         (202-02.feb is strip19)

         color strip first one on automatic, second on 10000

         did not rename the photometer files

         there is one photometer file too many. 206 and 207 are 
         probably from equal strips.
         
5:41PM   white balance at r+5, b-15
         diaphragma between 5.6 and 4, closer to 5.6
         p93 at 23, l at 168, z at 330

         height difference from upper grid row to middle is 23 mm
         between middle and lowest is 21 mm

         integration time at 5000 ms, low signal for the last two
         (67.5 and 78.75). Something went wrong in the first serie,
         one of the 8 files is missing there. files go from 218 to 
         243.

         getting the center of the sample in the center of the image
         is difficult. pushing the camera leads to shifts in both
         the horizontal and the vertical direction.

6:34PM   started actual measurements.
   

Feb 3 
9:50 AM turned lamp on

   checking tape backup by comparing 2 files (not the best check)
   will do an another tape back up after collecting the rest of sample1   

10:20 completed compare of the two files on tape drive, labelling tape 
      Tape 1A: sample 0 and part of sample 1

10:20 lamp voltage = 11.95 V

10:25 AM moved to camera position 2 
         starting measurements

11:AM  moved to camera position 3 started measurements

11:21 moved to camera position 4 started measurements

11:35 moved to camera position 5 started measurements
      note that the block between position 5 and position 6 is cracked

      moved to position 6 (also note crack with shared block of position 5)

12:00PM
      moved to position 7 , started measurements

Note: for positions 3 to 7 checked video preview while sample was facing
      camera at theta = 0 and adjust tripod/ camera to center image of
      sample, then checked that camera was horizontal with the balance

IMPORTANT: the images taken at camera position 7 were mostly saturated

12:03 PM going to do a truncated lamp calibration to test illumination

       I'm measuring gray strip 0, 5, 10, 15 , 18% gray card
       and cyan(which looks blue)/green/red both light and dark.
       (as always the order is left to right top to bottom)
       Photometer at position 1, sample alpha = 0 beta = 0. (frontal to lamp)
       strip0 5 sec 1cycle
       strip5 10 sec 1 cycle
       strip10 40 sec 1 cycle
       strip15 60 sec  1 cycle
       
       18% gray card 15 sec

       color strips 10 sec (bright)
       color strips 20 sec (dark) but last one (dark red was overload with 20
        so changed to 10 and the file is 254-03.feb)

       filenames 244-0.feb to 254-03.feb


12:40PM completed truncated calibration
         moved files to sample1 directory

1:05 I've been looking over the log and noticed one of the
     sample calibration files is missing. I'm redoing
     the sample calibration. 
     First file is 255-03.feb -262-03.feb (got low sig for 78.75 write anyway)
     ignore 263-03.feb
     moved to middle position by moving photometer by hand
     then used program to adjust sample angle
     (264-03.feb first file of middle row)
     
     noticed that photometer was not lined up with center
     (about width of spot off) this must be because
     I had to restart texture-measurement program
     (272-03.feb first file of third row)

     
1:40 completed