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_ATOD
Analog to Digital Gain (Electrons/DN) 
Datatype: REAL*4              
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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        
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TARGTYPE
qesiparm target type 
Datatype: CHARACTER*18        
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UAFMPTSL
AFM Port Select (A,B,or C) 
Datatype: CHARACTER*          
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UAFMPWR
AFM Electronics Power (ON,OFF) 
Datatype: CHARACTER*          
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UAFMRIUT
AFM RIU temperature (deg C) 
Datatype: REAL*4              
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UATPATMP
opt bench attach pt A temperature (deg C) 
Datatype: REAL*4              
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UATPBTMP
opt bench attach pt B temperature (deg C) 
Datatype: REAL*4              
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UATPCTMP
opt bench attach pt C temperature (deg C) 
Datatype: REAL*4              
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UBAY1TMP
bay 1 A1 temperature (deg C) 
Datatype: REAL*4              
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UBAY2TMP
bay 2 A1 temperature (deg C) 
Datatype: REAL*4              
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UBAY3TMP
bay 3 A1 temperature (deg C) 
Datatype: REAL*4              
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UBAY4TMP
bay 4 A1 temperature (deg C) 
Datatype: REAL*4              
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UBAY5TMP
bay 5 A1 temperature (deg C) 
Datatype: REAL*4              
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WBLDASNR
Blade A sensor: 0:closed, 1:open 
Datatype: INTEGER*4           
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WBLDBSNR
Blade B sensor: 0:closed, 1:open 
Datatype: INTEGER*4           
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UCALMIRS
Cal mirror status (Cal Mode/Obs Mode/Error) 
Datatype: CHARACTER*08        
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UCALMPWR
Cal module power (ON/OFF) 
Datatype: CHARACTER*03        
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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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UCH1HJTM
camera head hot junction 1 temperature (deg C) 
Datatype: REAL*4              
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UCHBHTMP
Opt bench CH BH temp (deg C) 
Datatype: REAL*4              
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UCHVLTS
camera head voltage (volts) 
Datatype: REAL*4              
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UCMODTMP
Cal module temp (deg C) 
Datatype: REAL*4              
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WEXPOCMD
expose command image 
Datatype: INTEGER*4           
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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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UFMBHTMP
Opt bench FM BH temp (deg C) 
Datatype: REAL*4              
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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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UHTPIHTR
heat pipe heater on (ON, OFF) 
Datatype: CHARACTER*03        
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ULVPSONF
LVPS power off (ON, OFF) 
Datatype: CHARACTER*03        
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UMECHPWR
mechanism power off (ON, OFF) 
Datatype: CHARACTER*03        
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UMECVOLT
mechanism supply voltage (volts) 
Datatype: REAL*4              
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UMNTPTMP
SOFA/shutter mounting plate temperature (deg C) 
Datatype: REAL*4              
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UN15VADC
- 15 v adc supply (volts) 
Datatype: REAL*4              
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UN15VANA
- 15 v analog supply (volts) 
Datatype: REAL*4              
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UP10VLGC
+10 volts logic supply (volts) 
Datatype: REAL*4              
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UP15VADC
+15 volts ADC supply (volts) 
Datatype: REAL*4              
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UP15VANA
+15 volts analog supply (volts) 
Datatype: REAL*4              
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UP1AFMX
PC 1 AFM X-position (arcsec) 
Datatype: REAL*4              
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UP1AFMY
PC 1 AFM Y-position (arcsec) 
Datatype: REAL*4              
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UP5VADC
+ 5 volts ADC supply (volts) 
Datatype: REAL*4              
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UP5VLGC
+ 5 volts logic supply (volts) 
Datatype: REAL*4              
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UPOMTEMP
Pickoff mirror temp (deg C) 
Datatype: REAL*4              
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UPOMXPOS
Pickoff mirror x-position (arcsec) 
Datatype: REAL*4              
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UPOMYPOS
Pickoff mirror y-position (arcsec) 
Datatype: REAL*4              
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UPYRMDTM
optical bench pyramid bulkhead temperature (deg C) 
Datatype: REAL*4              
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URADNTMP
Radiator -V2 temperature (deg C) 
Datatype: REAL*4              
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URADPTMP
Radiator +V2 temperature (deg C) 
Datatype: REAL*4              
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URFILTPS
SOFA partial step (counts) 
Datatype: INTEGER*4           
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URIUATMP
RIU A temperature (deg C) 
Datatype: REAL*4              
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URIUBTMP
RIU B temperature (deg C) 
Datatype: REAL*4              
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URPLHTR
replacement heater on (ON, OFF) 
Datatype: CHARACTER*03        
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UTECCUR
TEC current (mA) 
Datatype: REAL*4              
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UTECPWRS
TEC power off (ON, OFF) 
Datatype: CHARACTER*03        
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UTECVOLT
TEC supply voltage (volts) 
Datatype: REAL*4              
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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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UUVCAL
UV cal lamp status (ON/OFF) 
Datatype: CHARACTER*03        
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UUVINSEL
Cal lamp select (UV/INCAN) 
Datatype: CHARACTER*05        
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UUVLOUTM
UV lamp output (volts) 
Datatype: REAL*4              
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UVISCAL
Vis cal lamp status (ON/OFF) 
Datatype: CHARACTER*03        
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UW3AFMX
WFC 3 AFM X-position (arcsec) 
Datatype: REAL*4              
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UW3AFMY
WFC 3 AFM Y-position (arcsec) 
Datatype: REAL*4              
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UW4AFMX
WFC 4 AFM X-position (arcsec) 
Datatype: REAL*4              
Units:

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UW4AFMY
WFC 4 AFM Y-position (arcsec) 
Datatype: REAL*4              
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UWAPUSE
Shutter blade used (A or B) 
Datatype: CHARACTER*01        
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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)