PROCEDURE: 2w

TITLE: CTE monitor (WFC)

CATEGORY: monitor

PURPOSE: Check charge transfer properties of CCDs

FREQUENCY: Run after every major change, e.g. temp, gain setting, at 5
exp. levels.  Run this set once with parallel read-out and EPER
software, and once with serial read-out and FPR software.

DETECTOR: WFC

PREREQUISITES: none

HARDWARE REQUIREMENTS:  none

SOFTWARE REQUIREMENTS:  EPER & FPR readout software
                        M.R. Jones IDL EPER and FPR software.

COMMAND MODE: SMS?

PROCEDURE/EXPOSURES: 
        GAIN = 1
        Tungsten lamp (#1) on
         1. bias            0.0s
         -- read exposures 2-6 with serial FPR timing
         2. F555W x F435W   8.0s     (500)
         3. F555W x F435W  16.0s    (1000)
         4. F435W           1.2s    (2000)
         5. F435W           3.0s    (5000)
         6. F435W          12.0s   (20000)
         -- read exposures 7-11 with parallel EPER timing
         7. F555W x F435W   8.0s     (500)
         8. F555W x F435W  16.0s    (1000)
         9. F435W           1.2s    (2000)
        10. F435W           3.0s    (5000)
        11. F435W          12.0s   (20000)
        -- read last exposure with normal read out
        12. bias            0.0s



VARIANTS:       a- both serial FPR & parallel EPER readouts
                b- serial FPR readouts only
                c- parrallel EPER readout

TOTAL EXPOSURES:   a- 12
                 b,c-  7

TOTAL TIME: setup + (7 or 12)*overhead + (40.2s or 80.4s) 
            = 2.19 variant a
            = 1.34 variants b,c
        (setup = 10min, overhead = 10min)

ANALYSIS: 

(1) Determine CTE at different levels using EPER and FPR CTE analysis
software.

(2) Compare with results at other T_CCD, thorough CTE test.