STScI Logo

Hubble Space Telescope
WF/PC-1 Reference Files

Most recent updates to this memo are pointers to the WFPC1 Flat Field Closure Calibration files (J. Biretta, C. Ritchie, S. Baggett, J. Mackenty, Jan. 03, 1995), flagged as Cycle 3 flats, Cycle 2 & 3 Deltaflats, and Hi-Fidelity flats in the tables below. Before using these files, please read the memo WF/PC-1 Flat Field Closure Calibration for details.

-Sylvia M. Baggett and John W. MacKenty, STScI/SIB

Mar. 25, 1994

This document contains a listing of all full-mode WFPC reference files, grouped by type, that are presently available in the Calibration Data Base (CDB) System. These tables are intended to inform observers as to the quality of the calibration applied to their data by the PODPS pipeline processing and to provide an aid in selecting appropriate reference files for the re-calibration of WFPC observations. These datafiles may be requested by name from the STScI in the same fashion as any other non-proprietary data products.

Each reference file has listed along with it the date of its installation into the CDB system, the camera used and where necessary, the shutter, filter numbers, clock, and/or filternames are given as well. The dataname in the table is the rootname of the reference file; the file extensions follow the convention outlined in the STSDAS Calibration Guide, Chapter 7:

    ASCII header   Binary data   type of reference file 
    ------------   -----------   ----------------------
      .r0h           .r0d        static mask
      .r1h           .r1d        analog to digital converter correction
				 lookup table
    
      .r2h           .r2d        bias frame
      .b2h           .b2d        bias data quality file
    
      .r3h           .r3d        preflash frame
      .b3h           .b3d        preflash data quality file
    
      .r4h           .r4d        superpurge (currently not implemented)
      .b4h           .b4d        superpurge data quality file
    
      .r5h           .r5d        dark frame
      .b5h           .b5d        dark data quality file
    
      .r6h           .r6d        flatfield
      .b6h           .b6d        flatfield data quality file
    

The source of each reference file is specified in the "S" column: either place holder (P), ground test data (G), or in-flight (I). Place holder files have no effect during calibration, i.e., biases are all zeros, flats are all ones, and a-to-d files are simple ramps. The ground test data were obtained during the Thermal Vac tests performed on the instrument prior to launch, while the in-flight reference files are those obtained on-orbit. For the flatfields, an additional column, labeled EC, indicates the number of earth-calibs (observations of the bright Earth) used to create each flatfield. Finally, any other pertinent comments concerning a particular reference file are delegated to the last column. In the event of more than one appropriate flatfield for a given camera/filter combination, the comment field includes a rough comparison of the flat to previous flats.

A further note about flatfields: a number of flats are made from on-orbit observations taken in conjunction with a neutral density filter (F8ND or F122M). This usually was necessary for those filters where the bright earth often saturated the CCDs at the shortest possible exposure times. In addition, there are several cases where seperate flats were made from sets of exposures with and without the neutral density filter. While the preferred flat has been used in the pipeline, the basis for this preference is not particularly strong. The observer may want to re-calibrate their data with the alternate flat(s). Note, however, that the flatfields done in conjunction with F8ND or F122M have NOT had the signature of the neutral density filter removed and that there may be significant residual gradients (5-20%) across the field of view (see OV/SV Report, Faber et al., Chapter 6) due to the neutral density filter.

Super skyflats and other reference files from the Medium-Deep Sky Survey team have been installed in CDB; they are flagged as "MDS" in the tables below and may be retrieved in the same manner as other reference files. Please see the MDS memo on STEIS for more detailed information on these files. In addition, note that the Lick MDS group has delivered flatfield correction files for F555W and F785LP (e2a1258lw and e2a1258ow, respectively) which have been archived into CDB as deltaflats (archive class CDB; extensions r8h/r8d). Please see the Lick Correction Flats memo on STEIS for more information on those files.

    
    Table cwmskr   (WFPC static mask reference files)
    
	DATE      VERS CAM    DATANAME    S  COMMENT
    -----------------------------------------------------------------------
    
    1990 01 16     1    wf    9ck1433hw   P  all zeros
    1990 01 16     1    pc    9ck1433gw   P  all zeros
    1990 04 09     2    wf    a451212ow   G  test data
    1990 04 09     2    pc    a4512124w   G  test data
    
    1991 10 28     3    wf    bas1536lw   I  first on-orbit mask
    1991 10 28     3    pc    bas1536fw   I  first on-orbit mask
    1991 11 07     4    wf    bb615191w   I  headers fixed, no cal impact
    1991 11 07     4    pc    bb61518lw   I  headers fixed, no cal impact
     
    1994 02 22     5    wf    e2m1056hw   I  MDS mask from skyflats;
					     see MDS STEIS memo
    
    Table cwa2dr  (WFPC analog to digital reference files)
     
	DATE   VERS  CAM  DATANAME     S  COMMENT    
    -----------------------------------------------------------------------
    
    1990 01 26   2   wf   a1g1149bw    P  ramp
    1990 01 26   2   pc   a1g1148sw    P  ramp
    
    1990 08 17   3   pc   a8h1350qw    I  on-orbit, prior to UVflood
    1990 08 17   3   wf   a8h13518w    I  on-orbit, prior to UVflood 
    1991 10 15   4   pc   baf1526qw    I  post uv flood
    1991 10 15   4   wf   baf15320w    I  post uv flood
    1992 02 06   5   pc   c261402tw    I  improved data
    1992 02 06   5   wf   c2614032w    I  improved data
    
    Table cwbasr   (WFPC bias reference files)
     
	DATE   VER CAM   DATANAME   S   COMMENT                                 
    -----------------------------------------------------------------------
    
    1990 01 16  1   wf   9ck14336w  P   all zeros
    1990 01 16  1   pc   9ck14333w  P   all zeros        
    1990 04 09  2   wf   a421549nw  G   test data
    1990 04 09  2   pc   a4215477w  G   test data
    1991 03 28  3   pc   b3s1244jw  I   first inflight bias
    
    1991 09 06  4   pc   b951630dw  I   second inflight bias
    1991 10 17  5   wf   bah1450qw  I   inappropriate atod correction applied
    1991 10 17  5   pc   bah1450hw  I   inappropriate atod correction applied 
    1991 10 24  6   wf   bao1416bw  I   atod correction updated
    1991 10 24  6   pc   bao14168w  I   atod correction updated 
					    
    1991 11 07  7   wf   bb61518rw  I   headers fixed, no cal impact
    1991 11 07  7   pc   bb61518hw  I   headers fixed, no cal impact
    
    1992 02 06  8   wf   c261403gw  I   use with calwfp 1.2.0.2, SOGS Build 28.2
    1992 02 06  8   pc   c261403lw  I   use with calwfp 1.2.0.2, SOGS Build 28.2
    
    1993 08 12  9   wf   d8c0826lw  I   Cycle 1/2; constructed from data
					taken 5-23-91 to 4-1-93
    1993 08 12  9   pc   d8c0826nw  I   Cycle 1/2; constructed from data
					taken 5-22-91 to 2-2-93
     
    1994 02 22 10   wf   e2m10543w  I   MDS Smooth version of d8c08261w;
					see MDS STEIS memo
    
    Table cwprfr   (WFPC preflash reference files)
	 
	DATE   VERS  CAM SHUTT  FILTERS  DATANAME   S  COMMENT
				1   2
    -----------------------------------------------------------------------------
     
    1990 01 16   1   wf   a     1  47    9ck1201kw  P  zeros 
    1990 01 16   1   wf   b     1  47    9ck10273w  P  zeros 
    1990 01 16   1   pc   a     1  35    9ck1201ew  P  zeros 
    1990 01 16   1   pc   b     1  35    9ck1201fw  P  zeros 
    
    1990 04 09   2   wf   a     1  47    a421550qw  G  unnormalized
    1990 04 09   2   wf   b     1  47    a4215517w  G  unnormalized 
    1990 04 09   2   pc   a     1  35    a421548hw  G  unnormalized 
    1990 04 09   2   pc   b     1  35    a4215492w  G  unnormalized  
    
    1990 08 17   3   wf   a     1  47    a8h1537qw  G  normalized a421550qw
    1990 08 17   3   wf   b     1  47    a8h15384w  G  normalized a4215517w
    1990 08 17   3   pc   a     1  35    a8h15375w  G  normalized a421548hw
    1990 08 17   3   pc   b     1  35    a8h1537fw  G  normalized a4215492w
    
    1991 10 17   4   wf   a     1  47    bah14513w  I  unnormalized; incorrect atod
    1991 10 17   4   wf   b     1  47    bah14517w  I  unnormalized; incorrect atod
    1991 10 17   4   pc   a     1  35    bah1450mw  I  unnormalized; incorrect atod
    1991 10 17   4   pc   b     1  35    bah1450ow  I  unnormalized; incorrect atod
    
    1991 10 28   6   wf   a     1  47    bas0852ow  I  normalized; correct atod
    1991 10 28   6   wf   b     1  47    bas08539w  I  normalized; correct atod
    1991 10 28   6   pc   a     1  35    bas0851rw  I  normalized; correct atod
    1991 10 28   6   pc   b     1  35    bas0852ew  I  normalized; correct atod
    
    1991 11 07   7   wf   a     1  47    bb615194w  I  headers fixed, no cal impact
    1991 11 07   7   wf   b     1  47    bb615196w  I  headers fixed, no cal impact
    1991 11 07   7   pc   a     1  35    bb61518nw  I  headers fixed, no cal impact
    1991 11 07   7   pc   b     1  35    bb61518pw  I  headers fixed, no cal impact
    
    1991 12 03   8   wf   b     1  47    bc31318pw  I  header update, no cal impact
    
    1992 02 14   9   wf   a     1  47    c2e1441ew  I  updated to allow dummy CTE correction
    1992 02 14   9   wf   b     1  47    c2e1441mw  I  updated to allow dummy CTE correction
    1992 02 14   9   pc   a     1  35    c2e14421w  I  updated to allow dummy CTE correction
    1992 02 14   9   pc   b     1  35    c2e14428w  I  updated to allow dummy CTE correction
	    
    1992 08 14  10   wf   a     1  47    c8e0938sw  I  updated to include CTE correction
    1992 08 14  10   wf   b     1  47    c8e0939jw  I  updated to include CTE correction
    1992 08 14  10   pc   a     1  35    c8e09400w  I  updated to include CTE correction
    1992 08 14  10   pc   b     1  35    c8e0940gw  I  updated to include CTE correction
						  
    1993 08 12  11   wf   a     1  47    d8c0825tw  I  Cycle 1/2; created from data
						       taken 6-17-91 to 2-1-93
    1993 08 12  11   wf   b     1  47    d8c08262w  I  Cycle 1/2; created from data
						       taken 6-17-91 to 2-1-93
    1993 08 12  11   pc   a     1  35    d8c08265w  I  Cycle 1/2; created from data
						       taken 6-17-91 to 2-1-93
    1993 08 12  11   pc   b     1  35    d8c08267w  I  Cycle 1/2; created from
						       data taken 6-17-91 to 2-1-93
    
    1993 10 21  12   wf   a     1  47    dal15075w  I  alternate: for data May 23,1991
						       to Nov 10, 1992
    1993 10 21  12   pc   a     1  35    dal15079w  I  alternate: for data May 22,1991
						       to Feb 3 1994
    
    1994 02 22  13   wf   b     1  47    e2m10560w  I  MDS: Improved CTE correction;
						       see MDS STEIS memo
    
    Table  cwdrkr  (WFPC dark reference files)
     
	DATE   VERS CAM  CLOCK  DATANAME   S  COMMENT
    ----------------------------------------------------------------------------------------
    1990 01 16   1   wf    on   9ck12019w  P  zeros
    1990 01 16   1   wf   off   9ck12017w  P  zeros
    1990 01 16   1   pc    on   9ck1433aw  P  zeros
    1990 01 16   1   pc   off   9ck14339w  P  zeros
    
    1990 04 09   2   wf   off   a421550bw  G  unnormalized
    1990 04 09   2   pc   off   a4215481w  G  unnormalized
    1990 08 02   3   wf   off   a820854aw  G  normalized versions of a421550bw
    1990 08 02   3   pc   off   a820853sw  G  normalized versions of a4215481w
    
    1991 10 17   4   wf   off   bah1450tw  I  incorrect atod correction
    1991 10 17   4   pc   off   bah1450jw  I  incorrect atod correction
    1991 10 24   5   wf   off   bao1416fw  I  new bah1450tw, proper atod correction
    1991 10 24   5   pc   off   bao1416dw  I  new bah1450jw, proper atod correction
     
    1991 11 07   6   wf   off   bb61518tw  I  headers fixed, no calibration impact
    1991 11 07   6   pc   off   bb61518jw  I  headers fixed, no calibration impact
    
    1992 05 29   7   wf   off   c5t10337w  I  data clipped to lower limit of zero
    1992 06 02   8   pc   off   c611649iw  I  data clipped to lower limit of zero
    
    1993 03 22  11   wf   off   d3m1553qw  I  generated from data
					      taken Jul 5,1991 to Feb 3, 1992
    1993 03 22  10   wf   off   d3m1553fw  I  generated from data
					      taken Mar 8,1992 to  Aug 7,1992
    1993 03 22   9   wf   off   d3m1552pw  I  generated from data
					      taken after Aug 7,1992
    1993 09 16  14   wf   off   d9g1345nw  I  generated from data
					      taken after December 10, 1992 
    1993 10 12  15   wf   off   dac1424sw  I  generated from data
					      taken May 4, 1993 to May 24, 1993
    1993 10 12  16   wf   off   dac1425cw  I  generated from data
					      taken May 24, 1993 to Jun 28, 1993
    1993 10 12  17   wf   off   dac1425rw  I  generated from data
					      taken July 1993
    1993 10 14  21   wf   off   dae14273w  I  generated from data
					      taken Aug 12, 1993 to Oct 11, 1993
    1994 01 25  22   wf   off   e1p1107sw  I  generated from data
					      taken Oct 24,1993 to Nov 5,1993
    1994 01 25  23   wf   off   e1p1108ew  I  generated from data
					      taken Nov 5,1993 to Nov 21,1993
    1994 01 25  24   wf   off   e1p1108nw  I  generated from data
					      taken Nov 15, 1993 to Dec 1,1993
    1994 02 22  26   wf   off   e2m1054aw  I  MDS dark (Aug'92 to Dec'92 restack);
					      see MDS STEIS memo
    1994 02 22  26   wf   off   e2m1054dw  I  MDS dark (Mar'92 to Jul'92 restack);
					      see MDS STEIS memo
    1994 02 22  26   wf   off   e2m1054iw  I  MDS dark (Jul'91 to Dec'91 restack);
					      see MDS STEIS memo
    1994 02 22  26   wf   off   e2m1054mw  I  MDS dark (Aug'92 to Jul'93 Super Stack);
					      see MDS STEIS memo
    
    1993 04 02  12   pc   off   d421320nw  I  generated from data taken
					      July 17, 1991 to Jan 2, 1992
    1993 04 02  13   pc   off   d4213309w  I  generated from data taken
					      Mar 31, 1992 to Jul 25, 1992
    1993 03 22   9   pc   off   d3m1552sw  I  generated from data taken
					      after August 7,1992
    1993 09 16  14   pc   off   d9g1345qw  I  generated from data taken
					      after December 10, 1992
    1993 10 12  18   pc   off   dac14268w  I  generated from data taken
					      May 29, 1993 to Jun 21, 1993
    1993 10 12  19   pc   off   dac1426kw  I  generated from data taken
					      Jun 18, 1993 to Jul 19, 1993
    1993 10 12  20   pc   off   dac14274w  I  generated from data taken
					      August 1993
    1994 02 17  25   pc   off   e2h1625ew  I  generated from data taken
					      Sep 1,1993 to Oct 21,1993
    1994 01 25  22   pc   off   e1p11082w  I  generated from data taken
					      Oct 23,1993 to Nov 5,1993
    1994 01 25  23   pc   off   e1p1108gw  I  generated from data taken
					      Nov 7,1993 to Nov 20,1993
    1994 01 25  24   pc   off   e1p1108qw  I  generated from data taken
					      Nov 17, 1993 to Dec 3,1993
    
    

Table cwfltr (WFPC flatfield reference files)

Please see the separate steis Closure Flatfields memo for details on Cycle 3 and HiFidelity flatfields (pointer is at top of this file).

RE: Cycle 3 flats. Comment field contains exposure times of Earthflats used to generate the flatfield.

Note 1: These flats have ~5% artifacts in the form of narrow streaks. There are typically half a dozen or so 50-pixel-long streaks per CCD. These are useful for test purposes, and may be suitable for flat fielding if target falls away from streaks. This results from having only a small number of input Earthcals which are at nearly the same streak angle.

Note 2: Contains image which pre-dates the August 1993 decontamination.

Note 3: These flats have ~5% artifacts in the form of broad streaks. These are useful for test purposes. This results from having only a small number of input Earthcals which are at nearly the same streak angle.

    
    RE: Hi-Fi flats.   EET= Effective Exposure Time
    Type 1 = derived roughly as flat_filter = flat_filter+f122m * 
	    [patch, smooth(flat_f555w+f8nd / flat_f555w+f122m)].
	    See Closure flatfield STEIS memo for detailed discussion.
    Type 2 = derived by correcting f8nd reflection pattern.
    Type 3 = derived by correcting short exposure reciprocity error.
    *Contact J. Biretta (biretta@stsci.edu) for copies of these files; not
    yet archived as of 3 Jan 1995.
    
	DATE    CAM   FILTERNAMES   FLATNAME   S  EC  COMMENT
		       1      2
    ---------------------------------------------------------------------
    1990 02 22   wf  f122m  f230w   a2m1037nw  P  -  1's only    
		-----------
    1990 01 16   pc  f128lp         a1912527w  P  -  1's only
    1990 01 16   wf  f128lp         9cm1151rw  P  -  1's only
		-----------
    1990 04 19   pc  f157w          a2q1051ew  G  -  prelaunch test data     
    1990 05 03   wf  f157w          a3u0951aw  G  -  prelaunch test data
		-----------
    1990 04 09   wf  f194w          a3u15311w  G  -  prelaunch test data  
    1990 04 09   pc  f194w          a3u1529sw  G  -  prelaunch test data  
		-----------
    1990 01 16   pc  f230w          a191252aw  P  -  1's only
    1990 04 19   pc  f230w          a2q1051iw  G  -  prelaunch test data  
    1991 04 03   pc  f230w          b431549jw  I     preliminary on-orbit flat
    1992 04 21   pc  f230w          c4l0813bw  I  9  SV data
    
    1990 01 16   wf  f230w          9cm1151tw  P  -  1's only
    1990 05 03   wf  f230w          a3u0951dw  G  -  prelaunch test data  
    1992 04 21   wf  f230w          c4l0813iw  I  7  SV data
		-----------
    1990 01 16   pc  f284w          a191252cw  P  -  1's only
    1990 04 19   pc  f284w          a2q1051lw  G  -  prelaunch test data  
    1991 04 03   pc  f284w          b4315500w  I     preliminary on-orbit flat
    1992 04 21   pc  f284w          c4l0813fw  I 15  SV data
    
    1990 01 16   wf  f284w          9cm11522w  P  -  1's only
    1990 05 03   wf  f284w          a3u0951gw  G  -  prelaunch test data  
    1992 04 07   wf  f284w          c4708566w  I  4  SV data
		-----------
    1990 01 16   pc  f336w          a191252fw  P  -  1's only
    1990 04 09   pc  f336w          a3u15306w  G  -  prelaunch test data  
    1991 04 03   pc  f336w          b4315507w  I     preliminary on-orbit flat
    1992 01 13   pc  f336w          c1d10314w  I 15  SV data    
    1994 06 20   pc  f336w          e6k1017kw  I  4  0.35 sec, Cyc 3 flat, for exps < 1 sec
						     (see STEIS Closure memo)
    1994 12 ??   pc  f336w          pc336l*    I     >200 sec EET, Hi-Fi Flat, Cyc 3,
						     for exps > 1 sec,
						     Type 3 (see STEIS Closure memo)
    
    1990 01 16   wf  f336w          9cm11524w  P  -  1's only
    1990 04 09   wf  f336w          a3u15317w  G  -  prelaunch test data  
    1990 08 29   wf  f336w          a8t10308w  I     non uv-flooded  
    1991 11 12   wf  f336w          bb81446bw  G     exact replica of a3u15317w
    1992 01 13   wf  f336w          c1d1031jw  I 13  SV data
    1994 06 14   wf  f336w          e6e0944pw  I  5  0.11 sec, Cyc 3 flat, for exps < 1 sec
						     (see STEIS Closure memo)
    1994 06 14   wf  f8nd   f336w   e6e0944nw  I  9  30 sec, Cyc 3 flat, for exps > sec
						     (see STEIS Closure memo)
		-----------
    1990 01 16   pc  f368m          a191252iw  P  -  1's only
    1993 01 25   pc  f368m          d1p1317hw  I  8  Cycle 1 flatfield  
    1994 06 20   pc  f368m          e6k1017nw  I 12  0.60 sec, Cyc 3 flat, for exps < 1 sec
						     (see STEIS Closure memo)
    1994 06 20   pc  f8nd   f368m   e6k0945ew  I  8  300 sec, Cyc 3 flat (see STEIS Closure memo)
    1994 12 15   pc  f368m          ecg1245iw  I     300 sec EET, Hi-Fi Flat, Cyc 3,
						     for exps > 1 sec,
						     Type 2 (see STEIS Closure memo)
    
    1990 01 16   wf  f368m          9cm11526w  P  -  1's only
    1994 06 14   wf  f368m  f122m   e6e0944tw  I  6  80 sec, Cyc 3 flat (see STEIS Closure memo)
    1994 06 14   wf  f368m          e6e0944rw  I 12  0.20 sec, Cyc 3 flat, for exps < 1 sec
						     (see STEIS Closure memo)
		-----------
    1990 01 16   pc  f375n          a191252lw  P  -  1's only
    
    1990 01 16   wf  f375n          9cm11529w  P  -  1's only
    1992 01 13   wf  f375n          c1d1031mw  I  6  SV data
    1994 06 14   wf  f375m  f122m   e6e09452w  I  7  200 sec, Cyc 3 flat (see STEIS Closure memo)
    1994 06 14   wf  f8nd   f375m   e6e09454w  I  6  200 sec, Cyc 3 flat (see STEIS Closure memo)
    1994 06 16   wf  f375m          e6g1340dw  I 14  0.50 sec, Cyc 3 flat, for exps < 1 sec
						     (see STEIS Closure memo)
		-----------
    1990 01 16   pc  f413m          a191252nw  P  -  1's only
    1993 08 12   pc  f413m          d8c14542w  I  4  Cycle 1 flatfield
    1993 08 12   pc  f413m          d8c1453ow  I  7  alternate (normaliz. may not be appropriate:
						     3 earthcals saturated in P8)
    1994 06 20   pc  f8nd   f413m   e6k0945hw  I 15  200 sec, Cyc 3 flat (see STEIS Closure memo)
    1994 06 20   pc  f413m          e6k0945kw  I  6  0.23 sec, Cyc 3 flat, for exps < 1 sec
						     (see STEIS Closure memo)
    1994 12 15   pc  f413m          ecg1245mw  I     200 sec EET, Hi-Fi Flat, Cyc 3, for exps > 1 sec,
						     Type 2 (see STEIS Closure memo)
    1994 12 27   pc  f413m          ecr1431iw  I     200 sec EET, Hi-Fi Flat, Cyc 3, for exps > 1 sec,
						     Type 2; improved header, no cal impact
						     (see STEIS Closure memo)
    
    1990 01 16   wf  f413m          9cm1152cw  P  -  1's only
    1994 06 16   wf  f413m  f122m   e6g1340gw  I  7  40 sec, Cyc 3 flat (see STEIS Closure memo)
    1994 06 16   wf  f8nd   f413m   e6g1340iw  I  3  40 sec, Cyc 3 flat (see STEIS Closure memo)
		-----------
    1990 01 16   pc  f437n          a181624aw  P  -  1's only
    1990 01 16   wf  f437n          9cm0952mw  P  -  1's only
		-----------
    1990 01 16   pc  f439w          a181624bw  P  -  1's only
    1990 04 09   pc  f439w          a3u1530cw  G  -  prelaunch test data 
    1991 03 28   pc  f439w          b3s1244mw  I     preliminary on-orbit flat
    1991 11 12   pc  f439w          bbc0914hw  I     special,use 5/9/91-6/18/91 
    1992 10 06   pc  f439w          ca615387w  I     header update, no CAL impact
    1994 06 20   pc  f8nd   f439w   e6k0945nw  I  3  80 sec, Cyc 3 flat (see STEIS Closure memo)
    1994 12 15   pc  f439w          ecg1245rw  I     80 sec EET, Hi-Fi Flat, Cyc 3, for exps > 1 sec,
						     Type 2 (see STEIS Closure memo)
    1994 12 27   pc  f439w          ecr1318ew  I     80 sec EET, Hi-Fi Flat, Cyc 2, for exps > 1 sec,
						     for data taken  3 Feb 93 to  1 Aug 93
						     (see STEIS Closure memo)
    1994 12 27   pc  f439w          ecr1410iw  I     80 sec EET, Hi-Fi Flat, Cyc 2, for exps > 1 sec,
						     for data taken 30 Nov 92 to  3 Feb 93
						     (see STEIS Closure memo)
    1994 12 27   pc  f439w          ecr1418hw  I     80 sec EET, Hi-Fi Flat, Cyc 2, for exps > 1 sec,
						     for data taken  8 Aug 92 to 30 Nov 92
						     (see STEIS Closure memo)
    1994 12 27   pc  f439w          ecr1431ow  I     80 sec EET, Hi-Fi Flat, Cyc 3, for exps > 1 sec,
						     Type 2; improved header, no cal impact
						     (see STEIS Closure memo)
    
    1990 01 16   wf  f439w          9cm0952ow  P  -  1's only
    1990 04 09   wf  f439w          a3u1531fw  G  -  prelaunch test data        
    1990 09 18   wf  f439w          a9i11068w  I     non uv-flooded
    1991 11 12   wf  f439w          bb81446fw  G     exact replica of a3u1531fw
    1992 01 09   wf  f439w  f8nd    c191513cw  I  6  SV data 
    1994 06 16   wf  f8nd   f439w   e6g1340kw  I  4  20 sec, Cyc 3 flat (see STEIS Closure memo)
    
		----------
    1990 01 16   pc  f469n          a181624cw  P  -  1's only
    1992 01 13   pc  f469n          c1d10317w  I 10  SV data
		  
    1990 01 16   wf  f469n          9cm0952qw  P  -  1's only
		 ----------
    1990 01 16   pc  f487n          a181624dw  P  -  1's only
    1992 04 07   pc  f487n          c470855lw  I  6  SV data
    
    1990 01 16   wf  f487n          9cm0952rw  P  -  1's only
    1992 01 13   wf  f487n          c1d1031pw  I  5  SV data
    1994 06 16   wf  f487n  f122m   e6g1340nw  I 10  300 sec, Cyc 3 flat (see STEIS Closure memo)
    1994 06 16   wf  f8nd   f487n   e6g1340qw  I 10  300 sec, Cyc 3 flat (see STEIS Closure memo)
    1994 06 13   wf  f487n          e6d1028aw  I 12  0.30 sec, Cyc 3 flat, for exps < 1 sec
						     (see STEIS Closure memo)
    
		 ----------
    1990 01 16   pc  f492m          a181624fw  P  -  1's only
    1994 06 20   pc  f492m  f122m   e6k0945qw  I  4  100 sec, Cyc 3 flat (see STEIS Closure memo)
    1994 06 20   pc  f8nd   f492m   e6k09460w  I  3  100 sec, Cyc 3 flat (see STEIS Closure memo)
    1994 12 01   pc  f492m          ec115135w  I     100 sec EET, Hi-Fi Flat, Cyc 3, for exps > 1 sec,
						     Type 1 (see STEIS Closure memo)
    1994 12 27   pc  f492m          ecr10086w  I     100 sec EET, Hi-Fi Flat, Cyc 3, for exps > 1 sec,
						     Type 1; improved version (see STEIS Closure memo)
    
    1990 01 16   wf  f492m          9cm0952tw  P  -  1's only
    1993 06 21   wf  f492m  f122m   d6l1522ew  I  8  Cycle 1 flatfield
		 ----------
    1990 01 16   pc  f502n          a181624gw  P  -  1's only
    1990 04 19   pc  f502n          a2q1051ow  G  -  prelaunch test data  
    1992 04 07   pc  f502n          c470855qw  I  7  SV data
    
    1990 01 16   wf  f502n          9cm09531w  P  -  1's only
    1990 05 03   wf  f502n          a3t1204aw  G  -  prelaunch test data  
    1992 01 09   wf  f502n          c191513gw  I 21  SV data
    1992 01 13   wf  f502n  f122m   c1d1456aw  I  9  alternate SV data
    1993 06 30   wf  f502n          d6u1338jw  I  4  alternate Cycle 1 flat (within 5% of SV flat)
    1993 06 30   wf  f502n  f122m   d6u1338fw  I  5  alternate Cycle 1 flat (within 5% of alt SV flat)
    1994 06 13   wf  f502n  f122m   e6d1028dw  I 11  400 sec, Cyc 3 flat (see STEIS Closure memo)
    1994 06 13   wf  f8nd   f502n   e6d1028gw  I  9  400 sec, Cyc 3 flat (see STEIS Closure memo)
    1994 06 13   wf  f502n          e6d1028jw  I 10  0.30 sec, Cyc 3 flat, for exps < 1 sec
						     (see STEIS Closure memo)
    
		 ----------
    1990 01 16   pc  f517n          a181624iw  P  -  1's only   
    1992 01 09   pc  f517n  f122m   c1916437w  I  9  SV data 
    1992 01 13   pc  f517n          c1d14571w  I 13  alternate SV data 
    1993 06 11   pc  f517n  f122m   d6b13188w  I  6  alternate Cycle 1 flat (within ~5% of SV flat)
    1993 06 11   pc  f517n          d6b1318cw  I  2  alternate Cycle 1 flat (within ~5% of alt SV flat)
    1994 06 20   pc  f8nd   f517n   e6k09463w  I  3  500 sec, Cyc 3 flat (see STEIS Closure memo)
    1994 06 20   pc  f517n          e6k09466w  I 11  0.35 sec, Cyc 3 flat (see STEIS Closure memo)
    1994 06 17   pc  f517n  f122m   e6h10066w  I 11  500 sec, Cyc 3 flat (see STEIS Closure memo) 
    1994 06 20   pc  f517n          e6k09466w  I     0.35 sec EET, Cyc 3 flat, for exps < 1 sec
						     (see STEIS Closure memo)
    1994 12 01   pc  f517n          ec115139w  I     500 sec EET, Hi-Fi Flat, Cyc 3, for exps > 1 sec,
						     Type 1 (see STEIS Closure memo)
    1994 12 27   pc  f517n          ecr1008dw  I     500 sec EET, Hi-Fi Flat, Cyc 3, for exps > 1 sec,
						     Type 1; improved version(see STEIS Closure memo)
    
    1990 01 16   wf  f517n          9cm09533w  P  -  1's only   
    1994 06 13   wf  f517n  f122m   e6d1028lw  I  2  120 sec, Cyc 3 flat, for tests only
						     (see STEIS Closure memo) (note1)
		 ----------
    1990 01 16   pc  f547m          a191435dw  P  -  1's only
    1990 04 19   pc  f547m          a2q1021tw  G  -  prelaunch test data  
    1994 06 17   pc  f547m  f122m   e6h10069w  I  7  80 sec, Cyc 3 flat (see STEIS Closure memo) 
    1994 12 01   pc  f547m          ec11513cw  I     80 sec EET, Hi-Fi Flat, Cyc 3, for exps > 1 sec,
						     Type 1 (see STEIS Closure memo)
    1994 12 27   pc  f547m          ecr1424gw  I     80 sec EET, Hi-Fi Flat, Cyc 2, for exps > 1 sec,
						     (see STEIS Closure memo)
    1994 12 28   pc  f547m          ecs11228w  I     80 sec EET, Hi-Fi Flat, Cyc 3, for exps > 1 sec,
						     Type 1; header update, no cal impact
						     (see STEIS Closure memo)
    
    1990 01 16   wf  f547m          9cq0953sw  P  -  1's only
    1990 05 03   wf  f547m          a3t1204dw  G  -  prelaunch test data  
    1992 01 13   wf  f547m          c1d1031rw  I  4  SV data
    1994 06 13   wf  f547m  f122m   e6d1028ow  I  4  23 sec, Cyc 3 flat (see STEIS Closure memo)
    1994 06 13   wf  f8nd   f547m   e6d1028qw  I  2  23 sec, Cyc 3 flat (see STEIS Closure memo)
		 ----------
    1990 01 16   pc  f555w          a191435fw  P  -  1's only
    1990 04 09   pc  f555w          a3u1530iw  G  -  prelaunch test data
    1991 03 28   pc  f555w          b3s1244pw  I     preliminary on-orbit flat
    1991 11 12   pc  f555w          bbc0914rw  I     special,use 5/9/91-6/18/91 
    1991 11 19   pc  f555w          bbj1430ew  I     preliminary on-orbit flat
    1992 01 09   pc  f555w  f122m   c191643ew  I 10  SV data
    1992 02 03   pc  f555w  pol0    c2313109w  P 10  place holder; same as c191643ew
    1992 02 03   pc  f555w  pol60   c231310gw  P 10  place holder; same as c191643ew
    1992 02 03   pc  f555w  pol120  c231310mw  P 10  place holder; same as c191643ew
    1994 06 20   pc  f555w  f122m   e6k09468w  I  6  26 sec, Cyc 3 flat (see STEIS Closure memo)
    1994 06 20   pc  f8nd   f555w   e6k0946cw  I  2  26 sec, Cyc 3 flat, for tests only
						     (see STEIS Closure memo) (note 1)
    1994 07 05   pc  f8nd   f555w   e751348aw  I  2  26 sec, Cyc 3 flat, for exps > 1 sec
						     (see STEIS Closure memo)
    
    1994 12 01   pc  f555w          ec11513iw  I     26 sec EET, Hi-Fi Flat, Cyc 3, for exps > 1 sec,
						     Type 1; improved version (see STEIS Closure memo)
    1994 12 27   pc  f555w          ecr1424kw  I     26 sec EET, Hi-Fi Flat, Cyc 2, for exps > 1 sec,
						     (see STEIS Closure memo)
    1994 12 28   pc  f555w          ecs1122kw  I     26 sec EET, Hi-Fi Flat, Cyc 3, for exps > 1 sec,
						     Type 1; improved version; header update
						     (see STEIS Closure memo)
    
    1990 01 16   wf  f555w          9cq09540w  P  -  1's only
    1990 04 09   wf  f555w          a3u1531lw  G  -  prelaunch test data
    1990 08 29   wf  f555w          a8t10311w  I     non uv-flooded
    1991 11 12   wf  f555w          bb81446hw  G  -  exact replica of a3u1531lw
    1992 01 09   wf  f555w  f122m   c191513jw  I  7  SV data
    1994 02 22   wf  f555w          e2m10554w  I  7  MDS Restack of c191513jw; see MDS STEIS memo
    1994 02 22   wf  f555w          e2m1055dw  I     MDS Raw skyflat: 56 image stack;
						     see MDS STEIS memo
    1994 03 02   wf  f555w          e321016hw  I     MDS Super skyflat; see MDS STEIS memo
    1994 07 05   wf  f555w  f122m   e751348dw  I  2  6 sec, Cyc 3 flat (see STEIS Closure memo)
		 ----------
    1990 01 16   pc  f569w          a191435gw  P  -  1's only
    1990 04 19   pc  f569w          a2q10222w  G  -  prelaunch test data  
    1993 06 11   pc  f569w  f122m   d6b1318gw  I  5  Cycle 1 flatfield 
    1994 06 13   pc  f569w  f122m   e6d1559rw  I  6  35 sec, Cyc 3 flat (see STEIS Closure memo)
    1994 12 01   pc  f569w          ec11513mw  I     35 sec EET, Hi-Fi Flat, Cyc 3, for exps > 1 sec,
						     Type 1 (see STEIS Closure memo)
    1994 12 27   pc  f569w          ecr1105lw  I     35 sec EET, Hi-Fi Flat, Cyc 2, for exps > 1 sec,
						     (see STEIS Closure memo)
    1994 12 28   pc  f569w          ecs11230w  I     35 sec EET, Hi-Fi Flat, Cyc 3, for exps > 1 sec,
						     Type 1; header update, no cal impact
						     (see STEIS Closure memo)
    
    1990 01 16   wf  f569w          9cq09541w  P  -  1's only
    1990 05 03   wf  f569w          a3t1204fw  G  -  prelaunch test data  
    1993 06 21   wf  f569w  f122m   d6l1522mw  I  5  Cycle 1 flatfield
    1994 06 13   wf  f569w  f122m   e6d1028sw  I  3  8 sec, Cyc 3 flat (see STEIS Closure memo)
    1994 06 13   wf  f8nd   f569w   e6d10291w  I  2  8 sec, Cyc 3 flat, for exps > 1 sec
						     (see STEIS Closure memo)
    
		 ----------
    1990 01 16   pc  f588n          a191435hw  P  -  1's only   
    1993 01 25   pc  f588n          d1p13182w  I  6  Cycle 1 flatfield  
    
    1990 01 16   wf  f588n          9cq09543w  P  -  1's only   
    1993 06 21   wf  f588n          d6l15231w  I  5  Cycle 1 flatfield
    1993 06 21   wf  f588n  f122m   d6l1120iw  I  6  alternate Cycle 1 flatfield
    1994 06 13   wf  f588w  f122m   e6d10293w  I 10  400 sec, Cyc 3 flat (see STEIS Closure memo)
    1994 06 13   wf  f8nd   f588n   e6d10296w  I  6  400 sec, Cyc 3 flat (see STEIS Closure memo)
    1994 06 13   wf  f588w          e6d10298w  I 14  0.18 sec, Cyc 3 flat (see STEIS Closure memo)
						     (note 2)
    1994 06 24   wf  f588w          e6o1002cw  I 13  0.18 sec, Cyc 3 flat, for exps < 1 sec
						     (see STEIS Closure memo)
    
		 ----------
    1990 01 16   pc  f606w          a191435iw  P  -  1's only
    1990 02 22   pc  f606w  pol0    a2l12364w  P  -  1's only
    1990 04 19   pc  f606w          a2q10224w  G  -  prelaunch test data  
    1992 02 03   pc  f606w  pol60   c231312rw  P  -  1's only 
    1992 02 03   pc  f606w  pol120  c2313139w  P  -  1's only 
    1993 09 15   pc  f606w  f122m   d9e1058lw  I  7  Cycle 1 flatfield
    1994 06 17   pc  f606w  f122m   e6h1006hw  I  4  20 sec, Cyc 3 flat (see STEIS Closure memo) 
    1994 06 17   pc  f8nd   f606w   e6h1006kw  I  5  20 sec, Cyc 3 flat (see STEIS Closure memo)
    1994 12 01   pc  f606w          ec115047w  I     20 sec EET, Hi-Fi Flat, Cyc 3, for exps > 1 sec,
						     Type 1 (see STEIS Closure memo)
    1994 12 27   pc  f606w          ecr1105ow  I     20 sec EET, Hi-Fi Flat, Cyc 2, for exps > 1 sec,
						     (see STEIS Closure memo)
    1994 12 28   pc  f606w          ecs1111pw  I     20 sec EET, Hi-Fi Flat, Cyc 3, for exps > 1 sec,
						     Type 1; header update, no cal impact
						     (see STEIS Closure memo)
    
    1990 01 16   wf  f606w          9cq09544w  P  -  1's only
    1990 05 03   wf  f606w          a3u0951jw  G  -  prelaunch test data  
    1993 06 21   wf  f606w  f122m   d6l15238w  I  4  Cycle 1 flatfield
    1994 06 08   wf  f8nd   f606w   e6810581w  I  4  5 sec, Cyc 3 flat (see STEIS Closure memo)
		 ----------
    1990 01 16   pc  f622w          a191435jw  P  -  1's only
    1990 04 19   pc  f622w          a2q1051qw  G  -  prelaunch test data  
    1994 06 15   pc  f622w  f122m   e6f11159w  I  5  35 sec, Cyc 3 flat (see STEIS Closure memo) 
    1994 06 15   pc  f8nd   f622w   e6f1115cw  I  4  35 sec, Cyc 3 flat (see STEIS Closure memo) 
    1994 12 01   pc  f622w          ec11504dw  I     35 sec EET, Hi-Fi Flat, Cyc 3, for exps > 1 sec,
						     Type 1 (see STEIS Closure memo)
    1994 12 27   pc  f622w          ecr1105rw  I     35 sec EET, Hi-Fi Flat, Cyc 2, for exps > 1 sec,
						     (see STEIS Closure memo)
    1994 12 30   pc  f622w          ecs11124w  I     35 sec EET, Hi-Fi Flat, Cyc 3, for exps > 1 sec,
						     Type 1; header update, no cal impact
						     (see STEIS Closure memo)
    
    1990 01 16   wf  f622w          9cq09546w  P  -  1's only
    1990 05 03   wf  f622w          a3t1204iw  G  -  prelaunch test data  
    1992 01 09   wf  f622w  f122m   c191513nw  I  5  SV data
    1994 06 08   wf  f622w  f122m   e6810583w  I  4  8 sec, Cyc 3 flat (see STEIS Closure memo)
    1994 06 08   wf  f622w  f8nd    e6810588w  I  4  8 sec, Cyc 3 flat (see STEIS Closure memo)
    
		 ----------
    1990 01 16   pc  f631n          a191435kw  P  -  1's only   
    1990 04 19   pc  f631n          a2q1051tw  G  -  prelaunch test data  
    1993 01 25   pc  f631n          d1p1318jw  I  5  Cycle 1 flatfield  
    
    1990 01 16   wf  f631n          9cq09547w  P  -  1's only   
    1990 05 03   wf  f631n          a3t1204kw  G  -  prelaunch test data  
    1992 01 13   wf  f631n          c1d1031tw  I  8  SV data
    1994 06 08   wf  f631n          e681058aw  I  3  0.35 sec, Cyc 3 flat (see STEIS Closure memo);
						     for tests only (note 3)
		 ----------
    1990 01 16   pc  f648m          a191652mw  P  -  1's only
    1993 01 25   pc  f648m          d1p13198w  I 10  Cycle 1 flatfield  
    1994 06 15   pc  f648m  f122m   e6f1115ew  I  5  120 sec, Cyc 3 flat (see STEIS Closure memo) 
    1994 12 01   pc  f648m          ec11504iw  I     120 sec EET, Hi-Fi Flat, Cyc 3, for exps > 1 sec,
						     Type 1 (see STEIS Closure memo)
    1994 12 28   pc  f648m          ecr1512nw  I     120 sec EET, Hi-Fi Flat, Cyc 2, for exps > 1 sec,
						     (see STEIS Closure memo)
    1994 12 30   pc  f648m          ecs1112cw  I     120 sec EET, Hi-Fi Flat, Cyc 3, for exps > 1 sec,
						     Type 1; header update, no cal impact
						     (see STEIS Closure memo)
    
    1990 01 16   wf  f648m          a1811391w  P  -  1's only
    1994 06 08   wf  f648m  f122m   e681058dw  I  5  50 sec, Cyc 3 flat (see STEIS Closure memo)
		 ----------
    1990 01 16   pc  f656n          a191652ow  P  -  1's only   
    1990 04 19   pc  f656n          a2q10521w  G  -  prelaunch test data  
    1992 01 13   pc  f656n          c1d1031aw  I 11  SV data
    
    1990 01 16   wf  f656n          a1811398w  P  -  1's only   
    1990 05 03   wf  f656n          a3t1204nw  G  -  prelaunch test data  
    1992 01 13   wf  f656n          c1d10322w  I 15  SV data
		 ----------
    1990 01 16   pc  f658n          a191652rw  P  -  1's only   
    1992 01 13   pc  f658n          c1d1031cw  I 13  SV data
    1992 02 03   pc  f658n  pol0    c231310sw  P     placeholder; same as c1d1031cw
    1992 02 03   pc  f658n  pol60   c2313113w  P     placeholder; same as c1d1031cw 
    1992 02 03   pc  f658n  pol120  c2313118w  P     placeholder; same as c1d1031cw
    
    1990 01 16   wf  f658n          a181139bw  P  -  1's only   
    1992 01 13   wf  f658n          c1d10325w  I 14  SV data
		 ----------
    1990 01 16   pc  f664n          a1916530w  P  -  1's only   
    1990 04 19   pc  f664n          a2q10523w  G  -  prelaunch test data  
    1992 04 07   pc  f664n          c4708561w  I 10  SV data 
    1993 06 11   pc  f664n  f122m   d6b1318jw  I  8  alternate Cycle 1 flatfield 
    1993 06 11   pc  f664n          d6b1318mw  I  3  alternate Cycle 1 flatfield (within ~5% of SV flat)
    1994 06 13   pc  f664n          e6d16003w  I 14  0.26 sec, Cyc 3 flat, for exps < 1 sec
						     (see STEIS Closure memo)
    1994 06 13   pc  f664n  f122m   e6d16000w  I 16  500 sec, Cyc 3 flat (see STEIS Closure memo)
    1994 12 01   pc  f664n          ec11504ow  I     500 sec EET, Hi-Fi Flat, Cyc 3, for exps > 1 sec,
						     Type 1 (see STEIS Closure memo)
    1994 12 28   pc  f664n          ecr1008hw  I     500 sec EET, Hi-Fi Flat, Cyc 3, for exps > 1 sec,
						     Type 1; improved version
						     (see STEIS Closure memo)
    
    1990 01 16   wf  f664n          a181139ew  P  -  1's only   
    1990 05 03   wf  f664n          a3t1204rw  G  -  prelaunch test data  
		 ----------
    1991 01 02   pc  f673n          b1213473w  P  -  1's only
    1992 01 13   pc  f673n          c1d1031ew  I  9  SV data
    1994 06 15   pc  f673n          e6f1115hw  I  7  0.60 sec, Cyc 3 flat, for exps < 1 sec
						     (see STEIS Closure memo)
    1994 12 ??   pc  f673n          pc673l*    I     >200 sec EET, Hi-Fi Flat, Cyc 3, for exps > 1 sec,
						     Type 3 (see STEIS Closure memo)
    
    1990 08 30   wf  f673n          a8u10331w  P  -  1's only      
    1992 01 13   wf  f673n          c1d10327w  I 17  SV data
    1993 06 30   wf  f673n          d6u1338qw  I  4  alternate Cycle 1 flatfield (within 5% of SV flat)
    1993 06 30   wf  f673n  f122m   d6u1338nw  I  3  alternate Cycle 1 flatfield
    1994 06 08   wf  f673n  f122m   e681058fw  I 10  350 sec, Cyc 3 flat (see STEIS Closure memo)
    1994 06 08   wf  f673n          e681058iw  I 16  0.12 sec, Cyc 3 flat, for exps < 1 sec
						     (see STEIS Closure memo)
    
		 ----------
    1990 01 16   pc  f675w          a1916535w  P  -  1's only
    1990 04 19   pc  f675w          a2q10226w  G  -  prelaunch test data  
    1993 09 15   pc  f675w  f122m   d9e1058nw  I  8  Cycle 1 flatfield
    1994 06 24   pc  f8nd   f675w   e6o10022w  I  6  40 sec, Cyc 3 flat (see STEIS Closure memo)
    1994 06 24   pc  f675w  f122m   e6o10024w  I  9  40 sec, Cyc 3 flat (see STEIS Closure memo)
    1994 12 01   pc  f675w          ec11504tw  I     40 sec EET, Hi-Fi Flat, Cyc 3, for exps > 1 sec,
						     Type 1 (see STEIS Closure memo)
    1994 12 27   pc  f675w          ecr1439pw  I     40 sec EET, Hi-Fi Flat, Cyc 2, for exps > 1 sec,
						     (see STEIS Closure memo)
    1994 12 30   pc  f675w          ecs1112kw  I     40 sec EET, Hi-Fi Flat, Cyc 3, for exps > 1 sec,
						     Type 1; header update, no cal impact
						     (see STEIS Closure memo)
    
    1990 01 16   wf  f675w          a181139kw  P  -  1's only
    1990 05 03   wf  f675w          a3t12051w  G  -  prelaunch test data  
    1993 06 30   wf  f675w  f122m   d6u1350mw  I  9  Cycle 1 flatfield
		 ----------
    1990 01 16   pc  f702w          a1916537w  P  -  1's only
    1990 04 19   pc  f702w          a2q10229w  G  -  prelaunch test data  
    1991 03 28   pc  f702w          b3s1244rw  I     preliminary on-orbit flat 
    1991 11 12   pc  f702w  f122m   bbc09152w  I     special,use 5/9/91-6/18/91
    1992 01 09   pc  f702w  f122m   c191643kw  I  7  SV data
    1994 06 13   pc  f8nd   f702w   e6d16006w  I  3  26 sec, Cyc 3 flat (see STEIS Closure memo)
    1994 06 24   pc  f702w  f122m   e6o10027w  I  5  26 sec, Cyc 3 flat (see STEIS Closure memo)
    1994 12 01   pc  f702w          ec11452ew  I     26 sec EET, Hi-Fi Flat, Cyc 3, for exps > 1 sec,
						     Type 1 (see STEIS Closure memo)
    1994 12 27   pc  f702w          ecr1439sw  I     26 sec EET, Hi-Fi Flat, Cyc 2, for exps > 1 sec,
						     (see STEIS Closure memo)
    1994 12 28   pc  f702w          ecs10502w  I     26 sec EET, Hi-Fi Flat, Cyc 3, for exps > 1 sec,
						     Type 1; header update, no cal impact
						     (see STEIS Closure memo)
    
    1990 01 16   wf  f702w          a181139mw  P  -  1's only
    1990 05 03   wf  f702w          a3t12054w  G  -  prelaunch test data
    1992 01 09   wf  f702w  f122m   c191513rw  I  8  SV data
    1994 07 05   wf  f8nd   f702w   e751348fw  I  2  7 sec, Cyc 3 flat (see STEIS Closure memo)
		 ----------
    1990 01 16   pc  f718m          a1a1252dw  P  -  1's only
    1992 01 09   pc  f718m          c191643qw  I  6  SV data
    1993 06 11   pc  f718m  f122m   d6b1318qw  I  8  Cycle 1 flatfield (within 5% of SV flat)
    1994 06 20   pc  f718m  f122m   e6k1017pw  I  8  140 sec, Cyc 3 flat (see STEIS Closure memo)
    1994 12 01   pc  f718m          ec11452iw  I     140 sec EET, Hi-Fi Flat, Cyc 3, for exps > 1 sec,
						     Type 1 (see STEIS Closure memo)
    1994 12 28   pc  f718m          ecr1504aw  I     140 sec EET, Hi-Fi Flat, Cyc 2, for exps > 1 sec,
						     (see STEIS Closure memo)
    1994 12 28   pc  f718m          ecs1050ew  I     140 sec EET, Hi-Fi Flat, Cyc 3, for exps > 1 sec,
						     Type 1; header update, no cal impact
						     (see STEIS Closure memo)
    
    1990 01 16   wf  f718m          a1a0946nw  P  -  1's only
		 ----------
    1990 01 16   pc  f725lp         a1a1252fw  P  -  1's only
    1990 04 19   pc  f725lp         a2q1022bw  G  -  prelaunch test data  
    1993 09 15   pc  f725lp f122m   d9e1058pw  I  6  Cycle 1 flatfield
    1994 06 20   pc  f725lp f122m   e6k1017rw  I  6  26 sec, Cyc 3 flat (see STEIS Closure memo)
    1994 12 01   pc  f725lp         ec11452mw  I     26 sec EET, Hi-Fi Flat, Cyc 3, for exps > 1 sec,
						     Type 1 (see STEIS Closure memo)
    1994 12 28   pc  f725lp         ecr1512qw  I     26 sec EET, Hi-Fi Flat, Cyc 2, for exps > 1 sec,
						     (see STEIS Closure memo)
    1994 12 28   pc  f725lp         ecs1050lw  I     26 sec EET, Hi-Fi Flat, Cyc 3, for exps > 1 sec,
						     Type 1; header update, no cal impact
						     (see STEIS Closure memo)
    
    1990 01 16   wf  f725lp         a1a0946pw  P  -  1's only
    1990 05 03   wf  f725lp         a3u0951nw  G  -  prelaunch test data  
    1993 06 21   wf  f725lp f122m   d6l1523fw  I  3  Cycle 1 flatfield
		 ----------
    1990 01 16   pc  f785lp         a1a1252gw  P  -  1's only
    1990 04 09   pc  f785lp         a3u1530pw  G  -  prelaunch test data  
    1991 03 28   pc  f785lp         b3s1244tw  I     preliminary on-orbit flat
    1991 11 19   pc  f785lp         bbj1430pw  I     preliminary on-orbit flat
    1992 01 09   pc  f785lp f122m   c1916444w  I  6  SV data 
    1992 01 13   pc  f785lp         c1d14579w  I  9  alternate SV data
    1994 06 24   pc  f785lp f122m   e6o10029w  I  3  30 sec, Cyc 3 flat (see STEIS Closure memo)
    1994 12 01   pc  f785lp         ec11452qw  I     30 sec EET, Hi-Fi Flat, Cyc 3, for exps > 1 sec,
						     Type 1 (see STEIS Closure memo)
    1994 12 27   pc  f785lp         ecr14401w  I     30 sec EET, Hi-Fi Flat, Cyc 2, for exps > 1 sec,
						     (see STEIS Closure memo)
    1994 12 28   pc  f785lp         ecs1050rw  I     30 sec EET, Hi-Fi Flat, Cyc 3, for exps > 1 sec,
						     Type 1; header update, no cal impact
						     (see STEIS Closure memo)
    
    1990 01 16   wf  f785lp         a1a0946rw  P  -  1's only
    1990 04 09   wf  f785lp         a3u1531sw  G  -  prelaunch test data
    1990 09 18   wf  f785lp         a9i1106sw  I     non uv-flooded
    1991 11 12   wf  f785lp         bb81446kw  G     exact replica of a3u1531sw
    1992 01 09   wf  f785lp         c1915143w  I  4  SV data 
    1992 01 13   wf  f785lp f122m   c1d1456nw  I  4  alternate SV data
    1994 02 22   wf  f785lp         e2m1055lw  I  4  MDS Restack of c1d1456nw; see MDS STEIS memo
    1994 02 22   wf  f785lp         e2m10558w  I     MDS Raw skyflat: 79 image stack;
						     see MDS STEIS memo
    1994 03 02   wf  f785lp         e321016fw  I     MDS Super skyflat; see MDS STEIS memo 
    1994 06 10   wf  f8nd   f785lp  e6a1427rw  I  2  6 sec, Cyc 3 flat (see STEIS Closure memo);
						     for tests only (note 1)
    1994 07 05   wf  f8nd   f785lp  e751348hw  I  2  6 sec, Cyc 3 flat, for exps > 1 sec
						     (see STEIS Closure memo)
    
		 ----------
    1990 01 16   pc  f791w          a1a1252iw  P  -  1's only
    1990 04 19   pc  f791w          a2q10526w  G  -  prelaunch test data  
    1993 09 15   pc  f791w  f122m   d9e1058rw  I  5  Cycle 1 flatfield
    1994 06 13   pc  f791w  f122m   e6d16008w  I  3  40 sec, Cyc 3 flat (see STEIS Closure memo)
    1994 12 01   pc  f791w          ec114530w  I     40 sec EET, Hi-Fi Flat, Cyc 3, for exps > 1 sec,
						     Type 1 (see STEIS Closure memo)
    1994 12 28   pc  f791w          ecr1504cw  I     40 sec EET, Hi-Fi Flat, Cyc 2, for exps > 1 sec,
						     (see STEIS Closure memo)
    1994 12 28   pc  f791w          ecs10513w  I     40 sec EET, Hi-Fi Flat, Cyc 3, for exps > 1 sec,
						     Type 1; header update, no cal impact
						     (see STEIS Closure memo)
    
    1990 01 16   wf  f791w          a1a0946sw  P  -  1's only
    1990 05 03   wf  f791w          a3u0951pw  G  -  prelaunch test data  
    1993 07 29   wf  f791w  f122m   d7t1302fw  I  5  Cycle 1 flatfield
    1994 06 10   wf  f791w  f122m   e6a1427tw  I  4  10 sec, Cyc 3 flat (see STEIS Closure memo)
		 ----------
    1990 01 16   pc  f814w          a1a1252kw  P  -  1's only
    1990 04 19   pc  f814w          a2q10528w  G  -  prelaunch test data  
    1993 09 15   pc  f814w  f122m   d9e10590w  I  5  Cycle 1 flatfield
    1994 06 13   pc  f814w  f122m   e6d1600bw  I  4  26 sec, Cyc 3 flat (see STEIS Closure memo)
    1994 12 15   pc  f814w          ecg1245aw  I     26 sec EET, Hi-Fi Flat, Cyc 3, for exps > 1 sec,
						     Type 1 (see STEIS Closure memo)
    1994 12 28   pc  f814w          ecr1512tw  I     26 sec EET, Hi-Fi Flat, Cyc 2, for exps > 1 sec,
						     (see STEIS Closure memo)
    
    1990 01 16   wf  f814w          a1a09470w  P  -  1's only
    1990 05 03   wf  f814w          a3u0951tw  G  -  prelaunch test data 
    1993 07 29   wf  f814w  f122m   d7t1302hw  I  7  Cycle 1 flatfield
		 ----------
    1990 01 16   pc  f850lp         a1a1252lw  P  -  1's only
    1990 04 19   pc  f850lp         a2q1052aw  G  -  prelaunch test data  
    1993 09 15   pc  f850lp f122m   d9e10592w  I  5  Cycle 1 flatfield
    1993 09 15   pc  f850lp f122m   d9e1103rw  I  3  alternate Cycle 1 flatfield
    
    1990 01 16   wf  f850lp         a1a09472w  P  -  1's only
    1990 05 03   wf  f850lp         a3u09523w  G  -  prelaunch test data  
    1993 06 30   wf  f850lp f122m   d6u1350rw  I  6  Cycle 1 flatfield
    1994 06 10   wf  f8nd   f850lp  e6a14282w  I  2  6 sec, Cyc 3 flat (see STEIS Closure memo);
						     for tests only (note 1)
    
    1994 07 05   wf  f8nd   f850lp  e751348jw  I  2  6 sec, Cyc 3 flat, for exps > 1 sec
						     (see STEIS Closure memo)
    
		 ----------
    1990 01 16   pc  f875m          a1a1252nw  P  -  1's only
    1993 01 25   pc  f875m          d1p1319rw  I  3  Cycle 1 flatfield 
    1993 06 11   pc  f875m  f122m   d6b1318tw  I  3  alternate Cycle 1 flatfield
    1994 06 15   pc  f875m          e6f1115mw  I  2  0.11 sec, Cyc 3 flat (see STEIS Closure memo)
						     for tests only (note 1)
    1994 06 15   pc  f875m  f122m   e6f1115jw  I  6  80 sec, Cyc 3 flat (see STEIS Closure memo) 
    1994 06 13   pc  f8nd   f875m   e6d1600dw  I  2  80 sec, Cyc 3 flat (see STEIS Closure memo)
    1994 12 15   pc  f875m          ecg1245ew  I     80 sec EET, Hi-Fi Flat, Cyc 3, for exps > 1 sec,
						     Type 1 (see STEIS Closure memo)
    1994 12 28   pc  f875m          ecr1504ew  I     80 sec EET, Hi-Fi Flat, Cyc 2, for exps > 1 sec,
						     (see STEIS Closure memo)
    
    1990 01 16   wf  f875m          a1a09473w  P  -  1's only
    1993 07 29   wf  f875m  f122m   d7t1302jw  I  6  Cycle 1 flatfield
		 ----------
    1990 01 16   pc  f889n          a1b1200pw  P  -  1's only   
    1991 03 28   pc  f889n          b3s12452w  I     preliminary on-orbit flat
    1992 01 13   pc  f889n  f122m   c1d1031hw  I  5  SV data
    1992 01 13   pc  f889n          c1d1457jw  I  6  alternate SV data
    1994 06 17   pc  f8nd   f889n   e6h1006cw  I 14  500 sec, Cyc 3 flat (see STEIS Closure memo) 
    1994 06 17   pc  f889n  f122m   e6h1006fw  I 10  500 sec, Cyc 3 flat (see STEIS Closure memo) 
    
    1990 01 16   wf  f889n          a1b0845fw  P  -  1's only   
    1992 01 09   wf  f889n          c1915148w  I 12  SV data
    1992 01 13   wf  f889n  f122m   c1d1456gw  I  5  alternate SV data
    1993 07 29   wf  f889n          d7t1259bw  I  4  alternate Cycle 1 flatfield (within 8% of SV flat)
    1993 07 29   wf  f889n  f122m   d7t12598w  I  7  alternate Cycle 1 flatfield (within 3% of SV flat)
    1994 06 10   wf  f889n  f122m   e6a14285w  I 10  300 sec, Cyc 3 flat (see STEIS Closure memo)
    1994 06 10   wf  f8nd   f889n   e6a14288w  I  7  300 sec, Cyc 3 flat (see STEIS Closure memo)
    1994 06 10   wf  f889n          e6a1428aw  I  6  0.20 sec, Cyc 3 flat, for exps < 1 sec
						     (see STEIS Closure memo)
		 ----------
    1990 01 16   pc  f8nd           a1916532w  P  -  1's only
    1991 01 02   pc  f8nd           b121414sw  P  -  1's only
    
    1990 01 16   wf  f8nd           a181139iw  P  -  1's only
    1990 08 30   wf  f8nd           a8u1017gw  P  -  1's only
		 ----------
    1990 01 16   pc  f1042m         a1b1200mw  P  -  1's only
    1993 01 25   pc  f1042m         d1p1316sw  I  8  Cycle 1 flatfield  
    1994 06 20   pc  f1042m         e6k1017iw  I  4  0.80 sec, Cyc 3 flat, for exps < 1 sec
						     (see STEIS Closure memo)
    
    1990 01 16   wf  f1042m         a1b0845dw  P  -  1's only
    1993 01 25   wf  f1042m         d1p1320mw  I  9  Cycle 1 flatfield  
    1994 06 10   wf  f122m  f1042m  e6a1428dw  I  5  80 sec, Cyc 3 flat (see STEIS Closure memo)
    1994 06 10   wf  f8nd   f1042m  e6a1428gw  I  4  80 sec, Cyc 3 flat (see STEIS Closure memo)
    1994 06 10   wf  f1042m         e6a1428iw  I  3  0.11 sec, Cyc 3 flat, for exps < 1 sec
						     (see STEIS Closure memo)
		 ----------
    1990 01 16   pc  f1083n         a1b1200ow  P  -  1's only   
    
    1990 01 16   wf  f1083n         a1b0845ew  P  -  1's only   
    1993 01 25   wf  f1083n         d1p1321dw  I 10  Cycle 1 flatfield
		 ----------
    1992 02 03   pc  g200l          c231312lw  P  -  1's only 
    
    1990 09 18   wf  g200l          a9i1107dw  P  -  1's only   
    1992 02 03   wf  g450l          c231313lw  P  -  1's only 
    1990 02 22   wf  g450l          a2l1237dw  P  -  1's only
    1992 02 03   wf  g800l          c2313141w  P  -  1's only
    
			    CYCLE 2/3 WFPC1 DELTAFLATS
			    ==========================
    
    USEAFTER  CAM  MODE   FILTNAM DATA_FILE    DESCRIP (average value of deltaflat in each CCD)
      DATE                      (archive name)
    
    19920808   pc  full    f439w  e821116nw    aves: pc1=0.988825 pc2=0.987382 pc3=0.991679 pc4=0.979673
    19921130   pc  full    f439w  e821125jw    aves: pc1=0.994856 pc2=0.992372 pc3= 1.00386 pc4=0.994884
    19930203   pc  full    f439w  e8211320w    aves: pc1=0.999157 pc2=0.997177 pc3=1.01398 pc4=1.00482
    19920808   pc  full    f547m  e8113302w    aves: pc1=0.994264 pc2=0.991861 pc3=1.00484 pc4=0.999357
    19920808   pc  full    f555w  e8113305w    aves: pc1=0.995486 pc2=0.993987 pc3=1.00647 pc4=1.00034
    19920808   pc  full    f569w  e8113307w    aves: pc1=0.996229 pc2=0.993603 pc3=1.00617 pc4=1.00022
    19920808   pc  full    f606w  e8113309w    aves: pc1=0.997309 pc2=0.996645 pc3=1.00701 pc4=1.00418
    19920808   pc  full    f664n  e811330cw    aves: pc1=0.992573 pc2=0.995378 pc3=1.00724 pc4=1.00271
    19920808   pc  full    f673n  e811330ew    aves: pc1=0.998685 pc2=0.999236 pc3=1.00194 pc4=1.00077
    19920808   pc  full    f675w  e811330gw    aves: pc1=0.998288 pc2=1.00034 pc3=1.00026 pc4=1.00114
    19920808   pc  full    f702w  e811330iw    aves: pc1=0.998633 pc2=1.00033 pc3=0.997967 pc4=0.996168
    19920808   pc  full    f718m  e8113311w    aves: pc1=0.999649 pc2=1.00028 pc3=0.997892 pc4=0.0.997342
    19920808   pc  full   f785lp  e811330lw    aves: pc1=1.00339 pc2=1.0029 pc3=1.00011 pc4=0.998251
    19920808   pc  full    f791w  e811330nw    aves: pc1=1.00542 pc2=1.0057 pc3=1.00122 pc4=0.996179
    19920808   pc  full    f875m  e811330qw    aves: pc1=1.00704 pc2=1.005 pc3=1.00271 pc4=0.997706
    19920808   pc  full    f889n  e811330sw    aves: pc1=1.0061 pc2=1.0022 pc3=1.00056 pc4=0.994451
    19920808   pc  full   f1042m  e8113300w    aves: pc1=1.00036 pc2=1.00028 pc3=0.992321 pc4=0.994532
    
    19920808   wf  full    f439w  e8q11180w    aves: wf1=1.00753 wf2=1.00542 wf3=1.00872 wf4=1.003
    19930110   wf  full    f439w  e8q13281w    aves: wf1=1.00867 wf2=1.00964 wf3=1.01497 wf4=1.00679
    19930510   wf  full    f439w  e8q13365w    aves: wf1=1.00821 wf2=1.01001 wf3=1.01483 wf4=1.00724
    19920808   wf  full    f547m  e8q11184w    aves: wf1=1.00196 wf2=1.00071 wf3=1.00659 wf4=0.999276
    19920808   wf  full    f555w  e8q11189w    aves: wf1=1.00326 wf2=1.0043 wf3=1.00871 wf4=1.0031
    19920808   wf  full    f569w  e8q1118dw    aves: wf1=1.00052 wf2=1.00141 wf3=1.00559 wf4=1.00048
    19920808   wf  full    f606w  e8q1118iw    aves: wf1=1.00209 wf2=1.00321 wf3=1.00158 wf4=1.00274
    19920808   wf  full    f622w  e8q1118pw    aves: wf1=1.00258 wf2=1.00247 wf3=1.00061 wf4=1.00318
    19920808   wf  full    f631n  e8q1118tw    aves: wf1=1.00007 wf2=1.00308 wf3=1.00598 wf4=1.0031
    19920808   wf  full    f673n  e8q11193w    aves: wf1=1.00241 wf2=1.00426 wf3=1.00326 wf4=1.00375
    19920808   wf  full    f702w  e8q11198w    aves: wf1=1.00098 wf2=1.00211 wf3=0.997681 wf4=1.0023
    19920808   wf  full   f785lp  e8q1119dw    aves: wf1=0.996289 wf2=0.99777 wf3=0.997166 wf4=0.99911
    19920808   wf  full    f889n  e8q1119iw    aves: wf1=1.00174 wf2=1.00178 wf3=0.997629 wf4=1.00316
    19920808   wf  full   f1042m  e8q1117ow    aves: wf1=0.998542 wf2=0.998563 wf3=0.998626 wf4=0.998465