ALevel 0 Header Keywords

This appendix explains the 162 keywords in the XRT Level 0 FITS header.
Keyword Value
Definition
SIMPLET
Conforms to FITS standard
BITPIX8, 16, 32, -32, -64
Number of bits per pixel
NAXIS
2
Number of axes in the image
NAXIS1
Full image size in x
NAXIS2
Full image size in y
DATE’YYYY-MMDate and time of file creation (’T’ is character
DDThh:mm:ss.sss’’T’)
DATE RF0’YYYY-MMDate and time of Level 0 reformatting (’T’ isDDThh:mm:ss.sss’
character ’T’)
SATELLIT 0x21
Satellite number (from PDU header for images)
TELESCOPE ’SolarB’
Derived from above
INSTRUME ’XRT’;’SOT/SP’; Name of the instrument; reformatter only re’SOT/FG’trieves XRT records
TIMESYS’UTC’; ’TAI’
Time system of file header
MDP CLKMDP clock in units of 1/512th seconds; sameas E SCLOCK
FILEORIG
Original filename used by level 0 reformatter
P1ROW
0 to N-1
x-coordinate of beginning, or lower left handcorner, pixel in image FOV; same as RPOS ROW
P2ROW
0 to N-1
x-coordinate of ending, or upper right handcorner, pixel in image FOV; same as RPOS ROW+ RSIZ ROW - 1
P1COL
0 to N-1
y-coordinate of beginning, or lower left handcorner, pixel in image FOV; same as RPOS COL
P2COL
0 to N-1
y-coordinate of ending, or upper right handcorner, pixel in image FOV; same as RPOS COL+ RSIZ COL - 1
TR MODE’TR1’; ’TR2’; ’TR3’; ’TR4’; Tracking mode
’FIX’
IMG MODE
1-3
Image mode (source of exposure trigger); 1:
Table and manual, 2: Automatic Region Selection Patrol, 3: Flare Detection Patrol
AEC FLG’off’ ; ’on’
Automatic Exposure Control; 1: Off, 2: On
AEC TNUM
AEC table number; 0: Out of RB, 1: In RB
AEC RSLT0-3
45 Result of AEC calculation used to determine
exposure time; 0: Normal, 1: Underexposure,
2: Overexposure, 3: No feedback
ORIGIN’ISAS; NAOJ; MSSL; LM- Origin of the Chief Observer
SAL; GSFC; ’SAO

Keyword
DATA LEV

Value0, 1

ORIG RF0’ISAS ; NAOJ ; MSSL ; LMSAL ; GSFC ; ’SAO

VER RF0PROG VER
SEQN VER
PARM VER
PROG NOSUBR NOSEQN NO
MAIN CNT
MAIN RPT
MAIN POSSUBR CNT0-70-70-30-7

SUBR RPTSUBR POS
SEQN CNT
SEQN RPTSEQN POSOBSTITLE
TARGET’Active region’ ; ’Quiet region’ ; ’Coronal hole’ ; ’Flaresite’

SCI OBJSCI OBSOBS DEC
JOIN SBOBS NUM
JOP IDNOAA NUMOBSERVER
PLANNERTOHBANSDATATYPE’ESX’; ’SX’; ’EX’; ’X’

SAA’In’; ’Out’

46’SCI’; ’ENG’

Definition
Data Level; running trace prep.pro willchange 0 to 1
Where the level 0 file was createdVersion of Level 0 reformatter
MDP observation table program version number
OT sequence table version numberOT parameter table version number
OT program number
OT subroutine number being executed
OT sequence table number
OT number of times to repeat main loop
OT current main-routine iteration
OT main-routine position
OT sequential number of this subroutine in themain routine
OT number of times current subroutine is repeated
OT loop count for current subroutine
OT current sequence table repeat countOT sequence table repeat countOT sequence table position
Title of observation
Indicates the observation region. Flare siteused when flare flag is set. Source of information observation planning database, or telemetry if flare flag is set.
Up to 5 target phenomena selected from list.
See Mission-Wide Keywords document, p. 26.
Target phenomena.
A few sentences describing the properties ofthe observation.
Joint observation; E=EIS, S=SOT, X=XRTEqual to OBS ID
Identifier of JOP
AR Number as assigned by NOAA
Name(s) of Chief Observer
Name(s) of Chief Planner
Name(s) of Tohbans
Science or engineering data; darks and flats
are considered engineering dataIndicates whether Hinode is in or out of aSouth Atlantic Anomaly region

Keyword
HLZ

Value’In’; ’Out’

FLFLG
S INSTRUS DAT ID

’Flr’; ’Non’
41-3, 5-7

S DAT M

0, 1

S SP SIZ

31-609EC ID
EC INDEX

0-65535
0-35

EC EINDEEC CD MO
EC CD MEC IMTYP

0-35
0, 1’safe’ ; ’fast’
0, 1

EC IMTY’normal’ ; ’dark’

EC FW1EC FW10-5’Open’ ; ’Al poly’ ; ’C poly’; ’Be thin’ ; ’Be med’ ;’Al med’
0-5’Open’ ; ’Al poly’ ; ’Ti poly’; ’Gband’ ; ’Al thick’ ;’Be thick’
0, 1EC FW2EC FW2

EC VL
EC VL
E SCLOCK’closed’ ; ’open’

E LCLOCK

0-16777215
47

E SH OPE

0-16777215

E SH CLO

0-16777215

Definition
Indicates whether Hinode is in or out of Hight
Latitude Zone region
Indicates if flare flag set or not
Instrument number
Type of status packet this record was createdfrom: 0: Not used, 1: Normal status, 2: Normal and extended status, 3: Normal status
and memory, 4: Not used, 5: Standard HDR
only, 6: Extended status, 7: Memory
0: Transfer to Kagoshima Space Center (KSC)and Sagamihara Satellite Operation Center(SSOC); 1: Monitor only at KSC
Status packet size; maximum value is 609, including header.
Unique identifier, ’main ID’
Redundant to EC EINDE; consider this keyword
obsolete
Exposure Index
Cadence mode
Cadence mode as nameImage type; 0: Normal, 1: Dark (closed shutter)
Image type; a dark is taken with the shutter
closedFilter Wheel 1 position
Filter Wheel 1 position as name

Filter Wheel 2 position
Filter Wheel 2 position as name

Visible light shutter during exposure; 0:Closed, 1: OpenVisible light shutter during exposure as nameSpacecraft clock of most recent status request
prior to arrival of exposure command
Time at which exposure command processing
began, local clock, converted to µs
Time CCD EXPOSE and OPENOUT signals wereraised (low 24 bits), converted to µs
Time CCD EXPOSE and OPENOUT signals werelowered (low 24 bits), converted to µs

Keyword
EXCCDEXValue

OBT TIME

OBT ENDE SH POS
E SH WAE SH WB
E SH WCE SH CW
E SH CCW
E VLO

0, 1

E VLO
E VLC

’not fully open’; ’fully open’
0, 1

E VLC
E SH ERR
E FW1 PO

’not fully open’; ’fully open’
0, 1

E FW1 ST
E FW2 POE FW2 STE ETIM E

E ETIM M

E ETIM
48
EXPTIMEE TTNDefinition
Duration of CCD EXPOSE in µs; this is the correct value to use for dark exposure times
Spacecraft clock time when CCD EXPOSE wasraised; this is E SH OPE converted to spacecraft
clock time
Spacecraft clock time when CCD EXPOSE waslowered; this is E SH CLO converted to spacecraft clock time
Shutter encoder position
Waiting position A
Waiting position B
Waiting position C
Waiting clockwise exposure time
Waiting counterclockwise exposure time
VLS open microswitch; 0: Off (VLS not fullyopen), 1: On (VLS fully open)
State of VLS
VLS closed microswitch; 0: Off (VLS not fullyopen), 1: On (VLS fully open)
State of VLS
0: No error, 1: Shutter command error
Filter Wheel 1 course position (internal diagnostic format)
Filter Wheel 1 status
Filter Wheel 2 course position (internal diagnostic format)
Filter Wheel 2 status
Exposure time (exponent); see also E ETIM
(Though the value for E ETIM should be normalized if the data is normalized, E ETIM E
should remain unchanged so the user can reconstruct the original exposure time.)
Exposure time (mantissa); see also E ETIM
(Though the value for E ETIM should be normalized if the data is normalized, E ETIM M
should remain unchanged so the user can reconstruct the original exposure time.)
Exposure time in µs, derived from above twofields; this number should be normalized if thedata is normalized by exposure time
Requested exposure time in seconds (calculated from EC EINDE and exposure table)
Rev. number of exposure table

Keyword
EXPMPAS
E FW1 PE FW2 P

Value’single’; ’multi’’Open’; ’Al poly’; ’C poly’;’Be thin’;’Be med’;’Al med’Al poly’; ’Ti poly’; ’Gband’;’Al thick’; ’Be thick’

CCD TEMP
CCD TMPC
CCD READ
READPORTCHIP SUM

0, 1’L’; ’R’
1, 2, 4, 8

CAL INFO

0, 1

CALIMAGEPOS COL’CAL’ ; ’OBS’

POS ROWROI H SISIZ COL
ROI V SISIZ ROWRECTIFY
RPOS COL

49
RPOS ROWRSIZ COLDefinition
Single or multipass exposure
Filter Wheel 1 position

Filter Wheel 2 positionCCD temperature; tc=−95.853 +20.55376traw + 5.9941 · 10−5 traw
CCD temperature, derived from CCD TEMPCCD readout port; 0: right, 1: left
CCD readout port
On-chip pixel summation for CCD; 1: 1×1, 2:2×2, 3: 4×4, 4: 8×8
CCD image type; 0: Calibration image, 1: Observation image
CCD readout port (from CAL INFO)
CCD column number of start of image (original value multiplied by 8 to get number ofpixels)
CCD row number of start of image (originalvalue multiplied by 8 to get number of pixels)
ROI horizontal size; 1: 64, 2: 128, 3: 192, 4:256, 6: 384, 8: 512, 12: 768, 16: 1024, 24:1540, 32: 2048; (original value multiplied by
64 to get number of pixels)
Horizontal size of ROI, derived from above;
value is 0 if ROI H SIZE is reserved
ROI vertical size; 1: 64, 2: 128, 3: 192, 4: 256,6: 384, 8: 512, 12: 768, 16: 1024, 24: 1540,32: 2048; (original value multiplied by 64 toget number of pixels)
Vertical size of ROI, derived from above; value
is 0 if ROI V SIZE is reserved
Status of rectification to put solar south-east
corner at the start of the CCD image
The rectified coordinate, equivalent toPOS COL, as though the image had
been read out with this coordinate.
If
READPORT=R, RPOS COL=POS COL; otherwise
RPOS CPOS COL.
Rectified POS ROW. Always the same as
POS ROW.
Rectified SIZ COL. Always the same as
SIZ COL.

Keyword
RSIZ ROWEFFPORT
FOC POSBITCOMP1
IMGCOMP1
QTABLE1
BITC VER
ACHF VER
DCHF VERQTAB VERPCK SN0PCK SN1
NUM PCKSHKTSYNCDATE OBSTIME-OBSCTIMEDATE END

Value-2500 to 2500

276
150-7’YYYY-MMDDThh:mm:ss.sss’’hh:mm:ss.sss’’DOW MON DD hh:mm:ss
YYYY’’YYYY-MMDDThh:mm:ss.sss’

CRPIX1
CRPIX2SC ATTXSC ATTYCRVAL1

0.0

CRVAL20.0

CDELT1CDELT2CUNIT1CUNIT2CTYPE1

50Definition
Rectified SIZ ROW. Always the same as
SIZ ROW.
Rectified readout port
Focus position
Compression table keyword
Compression table keyword
Compression table keyword
Bit compression lookup table version
AC Huffman table version
DC Huffman table versionQuantization table version
Data packet keyword
Data packet keyword
Data packet keyword
True if fields derived from housekeeping data
have been updated. (That is, they are notmissing from the database.) Default is false.
UTC time when exposure began (’T’ is character ’T’)
Same value as DATE OBS, but in a different format
Example: ’Mon Mar 19 00:02:11 2007’; Samevalue as DATE OBS, but in a different format
UTC time when exposure began (’T’ is character ’T’)
Column number of Sun center pixel (sometimes negative)
Row number of Sun center pixel (sometimesnegative)
Spacecraft attitude in longitude
Spacecraft attitude in latitude
Number of arcseconds of the center of the sun
from the reference position in the azimuthal
direction (E-W); positive is to Solar West
Number of arcseconds of the center of the sun
from the reference position in the elevation direction (N-S); positive is to Solar North
Horizontal pixel size (PLATESCALE × SUMROW)
Vertical pixel size (PLATESCALE × SUMCOL)
Horizontal units
Vertical Units
Type of units (label) of horizontal axis

Keyword
CTYPE2
SAT ROTValueDefinitionType of units (label) of vertical axis
Difference between Solar north and y-axis ofthe satellite
Difference between spacecraft y-axis and image y-axis
Angle between x-axis of image (same as x-axisof CCD) and E-W axis of heliocentric coordinates (SAT ROT + INST ROT)
Angle between y-axis of image and N-Saxis of heliocentric coordinates (SAT ROT +INST ROT); CROTA1 and CROTA2 are identicalfor XRT
X-coordinate of center of field of view
Y-coordinate of center of field of view
Same as PLATESCLSame as PLATESCLWidth of field of view x-axis; equivalent to
NAXIS1 × CDELT1
Width of field of view y-axis; equivalent to
NAXIS2 × CDELT2
Platescale, in units of arcseconds per pixel

INST ROTCROTA1CROTA2

XCEN
YCEN
XSCALEYSCALE
FOVX
FOVY
PLATESCL51