PROCEDURE: 2h

TITLE: CTE monitor (HRC)

CATEGORY: monitor

PURPOSE: Check charge transfer properties of CCDs

FREQUENCY: Run after every major change, e.g. temp, at 5 exp. levels.
Run this set once with serial and once with parrallel read out.

DETECTOR: HRC

PREREQUISITES: 
(1) Verify count rate of tungsten#3 lamp with the F502N
and F625W filters.  Do this preferabley outside of TV.  
     - Done.  RAS/HOMS testing (11/98) shows count rates with 
       Tungsten 3 lamp, 4.0 times larger than model.  Exposure times
       used below are made using revised count-rates of
       C = 206, 2.56e4 e/s for F502N, F625W.
(2) Verify FPR read-out method with HRC using flight software.

HARDWARE REQUIREMENTS:  none

SOFTWARE REQUIREMENTS:  FPR readout software
                        M.R. Jones IDL FPR software.

COMMAND MODE: SMS

PROCEDURE/EXPOSURES: 
        GAIN=1
        Tungsten lamp (#3) on
	 1. bias	  0.0s
         -- read exposures 2-6 with serial FPR timing
	 2. F502N	  0.5s	   (100)
	 3. F502N	  2.5s	   (500)
	 4. F502N	  5.0s	  (1000)
	 5. F625W	  0.2s	  (5000)
	 6. F625W	  0.4s	 (10000)
         -- read exposures 7-11 with serial FPR timing
	 7. F502N	  0.5s	   (100)
	 8. F502N	  2.5s	   (500)
	 9. F502N	  5.0s	  (1000)
	10. F625W	  0.2s	  (5000)
	11. F625W	  0.4s	 (10000)

	12. bias	  0.0s

        Tungsten lamps #3 off

VARIANTS:       a- both serial & parrallel FPR sets
                b- Serial FPR readout set only 
                c- Parrallel FPR readout readout set only

TOTAL EXPOSURES: 12 (variant a), 
                  7 (variants b,c)

TOTAL TIME: setup + (7 or 12)*overhead + (5 or 10)*(<~10s) 
            = 0.59: hr (variant a)
            = 0.41: hr (variants b,c)
            (setup = 10min, overhead = 2min)

ANALYSIS: 

(1) Determine CTE at different levels.  Use M.R. Jones' FPR software.  

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