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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OBSMODE
observation mode 
Datatype: CHARACTER*18        
Units:
'DIRECT READOUT' if proposed mode is 'RAPID','ENGINEERING', 'PULSE-HEIGHT', 'THRESHOLD'; 'ACCUMULATION' if proposed mode is 'ACCUM','OSCAN','WSCAN', 'PHOTOSCAN'; 'TARGET ACQUISITION' if proposed mode is 'ACQ','IMAGE','DEFCAL', 'ACQ/PEAKUP'. (tguide 7.0-12)

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ZDOPMAG
OCT doppler shift correction magnitude 
Datatype: INTEGER*4           
Units:
See DOPMAG

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ZFLUXM
flux measurement at end of targ. acq. obs. 
Datatype: INTEGER*4           
Units:
The flux measurement, taken through whichever aperture (large or small), contains the target at the very end of a target acquisition observation. As the last (and always executable) phase of a target acquisition observation, one more frame of data is obtained from the instrument. The flux measurement is the sum of the counts of the 8 target acquisition diodes. SO-01p3-262.

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ZFSPYBF
control bits for spectrum y-balance 
Datatype: INTEGER*4           
Units:
1: Spectrum y balance offset should be used 2: Spectrum y balance offset should be computed

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ZFXMAPC
x deflection of the center of field map 
Datatype: INTEGER*4           
Units:

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ZFYMAPC
y deflection of the center of fiels map 
Datatype: INTEGER*4           
Units:

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ZINTPER
OCT integration period (number of 50 ms slices) 
Datatype: INTEGER*4           
Units:
50 ms slices): Number of 50ms blocks accumulated internally to produce 1 line of science data (1-255). SE-01p3-266.

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ZSPYBALU
spectrum y-balance offset 
Datatype: INTEGER*4           
Units:

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ZSRCHLCE
OCT y increment for field map 
Datatype: INTEGER*4           
Units:

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ZSRCHLCF
OCT x increment for field map 
Datatype: INTEGER*4           
Units:

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ZTREFH
OCT time of zero doppler correction 
Datatype: INTEGER*4           
Units:
Doppler shift 0 phase time (the time of zero doppler correction) Higher order bits in spacecraft clock units (125ms since Jan 1,1979) SE-01p3-266

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ZXDCALP
proportional x-deflection cal correction 
Datatype: REAL*4              
Units:

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ZXDCALU
x comp null deflection cal correction 
Datatype: REAL*4              
Units:

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ZYDCALP
prop y-def cal correction 
Datatype: REAL*4              
Units:

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ZYDCALU
y comp null deflection cal correction 
Datatype: REAL*4              
Units:
Name : ZYDCALU One_Liner : y comp null deflection cal correction DataType : REAL*4 Units : Definition:

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