HST Keyword Dictionary

Space Telescope Science Institute

3700 San Martin Drive

Baltimore, MD 21212

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Keyword Definitions for the

This is version 11.4, dated 16-NOV-1987

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SS_CAMRA
camera in use: WF (wide-field), PC (planetary) 
Datatype: CHARACTER*02        
Units:

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SS_FILTi
first filter number (0-48) 
Datatype: INTEGER*2           
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SS_MODE
instr. mode: FULL (full res.), AREA (area int.) 
Datatype: CHARACTER*04        
Units:

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SS_PFILi
Preflash Filter 1 number (0-48) 
Datatype: INTEGER*2           
Units:

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SS_PFTIM
Predicted preflash time in seconds 
Datatype: REAL*4              
Units:    SECONDS

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TARGTYPE
qesiparm target type 
Datatype: CHARACTER*18        
Units:

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WBA1LGCT
bay 1 A1 temperature (deg C) 
Datatype: REAL*4              
Units:

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WBA2EDTM
bay 2 A1 temperature (deg C) 
Datatype: REAL*4              
Units:

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WBA3PCTM
bay 3 A1 temperature (deg C) 
Datatype: REAL*4              
Units:

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WBA4WFTM
bay 4 A1 temperature (deg C) 
Datatype: REAL*4              
Units:

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WBA5TEMP
bay 5 A1 temperature (deg C) 
Datatype: REAL*4              
Units:

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WBLDASNR
Blade A sensor: 0:closed, 1:open 
Datatype: INTEGER*4           
Units:

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WBLDBSNR
Blade B sensor: 0:closed, 1:open 
Datatype: INTEGER*4           
Units:

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WCANLTIM
time of cancel operation command 
Datatype: INTEGER*4           
Units:
To obtain control of the exposure, a Cancel Operation Command is issued to the instrument a minimum of 16.525 seconds after the initiating major frame pulse. The spacecraft time (in the same format as for WEXPOTIM) is stored in WCANLTIM. (norton.22)

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WCH1HJTM
camera head hot junction 1 temperature (deg C) 
Datatype: REAL*4              
Units:

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WCH7HJTM
hot junction 7 temperature (deg C) 
Datatype: REAL*4              
Units:

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WCHVLTS
camera head voltage (volts) 
Datatype: REAL*4              
Units:

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WEXPOCMD
expose command image 
Datatype: INTEGER*4           
Units:

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WEXPODUR
commanded duration of exposure (sec) 
Datatype: INTEGER*4           
Units:    SECONDS

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WEXPOTIM
maj frame pulse time preceding exp start (cnts) 
Datatype: INTEGER*4           
Units:
Decimal representation of the 16 low order bits (lsb) of the time tag given by the spacecraft to the major frame pulse (mfp) preceding the start of a WFPC exposure. (ETS-c)

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WEXPTMHI
maj frame pulse time preceding exp start (cnts) 
Datatype: INTEGER*4           
Units:
Decimal representation of the 16 high order bits (Msb) of the time tag given by the spacecraft to the major frame pulse (mfp) preceding the start of a WFPC exposure. (but using a place value for each bit as if they were lsb!. i.e, the given value is really WEXPTMHI/2**16)

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WFCSTAT
control/status word for exposure 
Datatype: INTEGER*4           
Units:
0 if nominal WFPC microprocessor control of the shutters. 1 if NSCC-1 controlled the shutters. (generally meaning an interrupted exposure.) (ETS-c)

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WFOCTMnn
time of first close B shutter 
Datatype: INTEGER*4           
Units:
Telemetered values to determine the actual exposure time nn=odd: Time of shutter closing; nn=even: Time of shutter opening.

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WFOSPOSV
relative focus position voltage (counts) 
Datatype: INTEGER*4           
Units:

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WHOLDHTR
replacement heater on (ON, OFF) 
Datatype: CHARACTER*03        
Units:

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WHTPIHTR
heat pipe heater on (ON, OFF) 
Datatype: CHARACTER*03        
Units:

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WMECHPWR
mechanism power off (ON, OFF) 
Datatype: CHARACTER*03        
Units:

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WMECIFAT
mechanical interface A temperature (deg C) 
Datatype: REAL*4              
Units:

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WMECIFBT
mechanical interface B temperature (deg C) 
Datatype: REAL*4              
Units:

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WMECIFCT
mechanical interface C temperature (deg C) 
Datatype: REAL*4              
Units:

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WMECVOLT
mechanism supply voltage (volts) 
Datatype: REAL*4              
Units:

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WN15VADC
- 15 v adc supply (counts) 
Datatype: INTEGER*4           
Units:

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WN15VANA
- 15 v analog supply (counts) 
Datatype: INTEGER*4           
Units:

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WP10VLGC
+10 volts logic supply (volts) 
Datatype: REAL*4              
Units:

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WP15VADC
+15 volts ADC supply (volts) 
Datatype: REAL*4              
Units:

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WP15VANA
+15 volts analog supply (volts) 
Datatype: REAL*4              
Units:

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WP5VADC
+ 5 volts ADC supply (volts) 
Datatype: REAL*4              
Units:

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WP5VLGC
+ 5 volts logic supply (volts) 
Datatype: REAL*4              
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WPCTECA
OLDTEC current (mA) 
Datatype: REAL*4              
Units:

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WPCTECV
OLDTEC supply voltage (volts) 
Datatype: REAL*4              
Units:

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WPTECPWR
OLDTEC power off (ON, OFF) 
Datatype: CHARACTER*03        
Units:

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WPWRONF
power off (ON, OFF) 
Datatype: CHARACTER*03        
Units:

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WPYRMDTM
optical bench pyramid bulkhead temperature (deg C) 
Datatype: REAL*4              
Units:

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WRADATMP
OLDRadiator +V2HP 3/4/7/8 temperature (deg C) 
Datatype: REAL*4              
Units:

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WRIUATEM
RIU A temperature (deg C) 
Datatype: REAL*4              
Units:

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WRIUBTEM
RIU B temperature (deg C) 
Datatype: REAL*4              
Units:

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WSTRCTEM
SOFA/shutter mounting plate temperature (deg C) 
Datatype: REAL*4              
Units:

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WTIMEXPO
time of 110 msec expose command 
Datatype: INTEGER*4           
Units:
As its last action at the end of an exposure, the WFSHCON command is executed. That command generates a 110 msec Executable Exposure Command to reset the WF/PC microprocessor's shutter control logic, as well as to initiate the CCD readout. The spacecraft time of this command is recorded in WTIMEXPO. (norton.22)

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WUVMTEMP
OLDRadiator -V2HP 1/2/5/6 temperature (deg C) 
Datatype: REAL*4              
Units:

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WWCANCM
cancel operation command bit 
Datatype: INTEGER*4           
Units:
To obtain control of the exposure, a Cancel Operation Command is issued to the instrument a minimum of 16.525 seconds after the initiating major frame pulse. The spacecraft time (in the same format as for WEXPOTIM) is stored in WCANLTIM and the bit WWCANCM is set. (norton.22)

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WWLOGOF
log overflow bit 
Datatype: INTEGER*4           
Units:
The spacecraft times for the WFPC shutter opens and closes are recorded in the telemetered fields WFOCTMnn. However, only the first 8 'close' commands ( and 7 additional 'open' commands) can be accomodated in the SHP. If more activity occurs, the subsequent times are not recorded, but the WWLOGOF flag is set to indicate that the log overflowed. (norton.22)

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WWSCAP
shutter control application processor bit 
Datatype: INTEGER*4           
Units:
This bit is set if, as its last action at the end of an exposure, the WFSHCON command was executed. That command generates a 110 msec Executable Exposure Command to reset the WF/PC microprocessor's shutter control logic, as well as to initiate the CCD readout. (norton.22)

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HST Keyword Dictionary: 3/15/94: (rose@stsci.edu)