* * *** sample of the FITS headers of a YLA level_2 product (sx3c_19930720_035753_121.fts) *** * * -------------------------------------------------------------------------------------------------- tag name group value(decimal) description -------------------------------------------------------------------------------------------------- SIMPLE (a) 0 If the file conforms to FITS standard. 'T'(true) is assumed. BITPIX (a) -32 Number of bits that represent a data value. 8 : Character or unsigned binary integer. 16 : 16-bit twos-complement binary integer. 32 : 32-bit twos-complement binary integer. -32 : IEEE single precision floating point. -64 : IEEE double precision floating point. NAXIS (a) 2 Representing the number of axes in the associated data array. NAXIS1 (a) 512 Number of elements along the first axis of the data array. NAXIS2 (a) 512 Number of elements along the second axis of the data array. INDEX_VE (b) 4113 General(GEN) index structure version of the original XDA data. TIME (b) 14273465 Time (millisec of day) when the image was commanded. Referred by $SSW/yohkoh/gen/galileo/idl/lmsal/GT_TIME.PRO. DAY (b) 5315 Day (since 1-Jan-79) when the image was commanded. Referred by $SSW/yohkoh/gen/galileo/idl/lmsal/GT_DAY.PRO. DP_MODE (b) 141 DP mode. Referred by a SSW function, $SSW/yohkoh/gen/galileo/idl/lmsal/GT_DP_MODE.PRO. DP_RATE (b) 128 DP rate. Referred by a SSW function, $SSW/yohkoh/gen/galileo/idl/lmsal/GT_DP_RATE.PRO. FLARE_CO (b) 5 Flare flag control (active triggers). RBM_STAT (b) 0 Radiation Belt Monitor Status. TELEMETR (b) 37 Telemetry mode. CAL_STAT (b) 64 Calibration status. PNTG_ANG (b) 9763968 X,Y,Z euler angles in sun pointing coordinates (truncated). PNTG_TRA (b) 1 Information on how pointing was derived. PNTG_JIT (b) 0 Magnitude of pointing change. DATA_QUA (b) 0 Data quality. NMISSSAM (b) 0 Number of missing bytes (due to telemetry drop outs). STARTSAM (b) 0 Starting sample number of good data. DATA_WOR (b) 4 Data word type (the value 2 indicates Integer*4) NINDEXST (b) 0 Number of "extra" index structures following the general index structure. NINDEXBY (b) 352 Number of bytes in the index records. NDATABYT (b) 1048576 Number of byte in the data section. SXT_POW_ (b) 251 SXT power status (0=off, 1=on). b7 = 5 Volts b6 = 28 Volts b5 = Filter Wheel b4 = Shutter / Aspect Controller b3 = Micro A Select b2 = Micro B Select b1 = Camera b0 = Thermoelectric Cooler (TEC) BCS_POW_ (b) 238 BCS power status. HXT_POW_ (b) 240 HXT power status. WBS_POW_ (b) 98 WBS power status. SXT_CONT (b) 192 SXT control status. b7 = Power control mode (1=auto, 0=manual) b6 = SXT control mode (1=auto, 0=manual) b2:3 = SXT day/night mode 00 = SXT day mode 01 = SXT evening mode 10 = SXT night mode 11 = SXT morning mode b1 = SXTE-U hard reset (1=executed) b0 = SXTE-U soft reset (1=executed) SINDEX_V (b) 12307 SXT index structure version of the original XDA data. PFI_FFI (b) 1 Image information : referred by a SSW function, $SSW/yohkoh/gen/galileo/idl/lmsal/GT_PFI_FFI.PRO. b0:2 = Image type 0 = PFI ("raw" PFI strips - not assembled) 1 = FFI 2 = PFI (assembled ORs) 3 = FFI - Patrol image buffer dump (b0=0 is PFI, b0=1 is FFI) b3 = For FFI 0=BLS off, 1=BLS on b4:7 = For PFI = "OR" exposure # b4:7 = For FFI = ROI# of nROI PERIPH (b) 209 Aspect/Shutter/Filter information: Referred by SSW functions, $SSW/yohkoh/gen/galileo/idl/lmsal/GT_FILTA.PRO. $SSW/yohkoh/gen/galileo/idl/lmsal/GT_FILTB.PRO. b7 = Aspect door (0=closed, 1=open) b6 = Shutter mode (0=Frame Transfer, 1=Mech) b3:5 = Filter B position 1 = Open 2 = Al 1400 Angstrom 3 = Al/Mg/Mn 4 = Ber 100 microns 5 = Al 12 microns 6 = Mg3Mu b0:2 = Filter A position 1 = Open 2 = Narrow Band (4310 A, 30 A FWHM) 3 = Quartz defocusing lens (photon flood) 4 = Diffuser 5 = Wide Band (4600 A, 185 A FWHM) 6 = Neutral Density Mask (8%) EXPLEVMO (b) 21 Exposure mode/Level : Referred by a SSW function, $SSW/yohkoh/gen/galileo/idl/lmsal/GT_EXPMODE.PRO. b6:7 = Exposure mode (0=normal, 1=dark, 2=LTF) b0:5 = Mailbox exposure level IMGPARAM (b) 1 Image parameter information. b6:7 = Exposure cadence (0=2sec,1=1sec,2=.5sec) b4:5 = Number of ROI (0=1 ROI, 1=2 ROI, ...) b2:3 = Compression (0=Cmp, 1=Low8, 2=Hi8) b0:1 = Image resolution (0=1x1,1=2x2,3=4x4) FLUSH (b) 69 Flush information b0:1 = Pre-exposure Full frame flushes (0-3) b2:3 = Set-up full frame flushes # flushes = 2*(b2:3 value) in ROM = 4*(b2:3 value) 30-sep-91 to 7-Oct-91? = 8*(b2:3 value) after 7-Oct-91 b4:7 = Guard band EXPLAT (b) 2449 Exposure latency (mailbox value) EXPDUR (b) 9231 Exposure duration (mailbox value) : Referred by a SSW function, $SSW/yohkoh/gen/galileo/idl/lmsal/GT_EXPDUR.PRO. SHAPE_C1 (b) 512 Commanded image shape, X-size in summed (output) pixels. Redefined by YLA. referred by a SSW function, $SSW/yohkoh/gen/galileo/idl/lmsal/GT_SHAPE_CMD.PRO. SHAPE_C2 (b) 512 Commanded image shape, Y-size in summed (output) pixels. Redefined by YLA. referred by a SSW function, $SSW/yohkoh/gen/galileo/idl/lmsal/GT_SHAPE_CMD.PRO. CORNE_C1 (b) 0 Commanded starting corner, X-coord. in 1x1(non-summed) pixels. The values are CCD column numbers and are NOT reversed. The SXT images have been reversed before being written to disk so CCD col-0 is to the right (high indices) in the image array. For FFI, it is always = 0 (but check BLS on/off) Redefined by YLA. Referred by a SSW function, $SSW/yohkoh/gen/galileo/idl/lmsal/GT_CORNER.PRO. CORNE_C2 (b) 0 Commanded starting corner, Y-coord. in 1x1(non-summed) pixels. The values are CCD column numbers and are NOT reversed. The SXT images have been reversed before being written to disk so CCD col-0 is to the right (high indices) in the image array. For multiple ROI FFI it is the start of one ROI. Redefined by YLA. Referred by a SSW function, $SSW/yohkoh/gen/galileo/idl/lmsal/GT_CORNER_CMD.PRO. PIX_SIZE (b) 1.0000000 Redefined by YLA to hold the value of spatial resolution of the original data (index.his.PIXEL_SIZE). 0 : full resolution (2.45 arcsec/pix). 1 : half resolution (4.9 arcsec/pix). 2 : quarter resolution (9.8 arcsec/pix). Referred by a SSW function, $SSW/yohkoh/gen/galileo/idl/lmsal/GT_CORNER_CMD.PRO. FOV_VER (b) 0 Info on how pitch and yaw relative to sun center were derived. (NOTE: the tag for pitch and yaw values were eliminated by YLA due to truncated information.) OBSREGIO (b) 144 Observing region Number. b6:7 = FFI Seq Table # (0-3) from Entry Table. b4:5 = PFI Seq Table # (0-3) from Entry Table. b0:3 = Observing region number (0-8). Location # on the sun. (0-3) Updated by QT ARS. (4-7) Updated manually (with ART option). (8) Updated by FL ARS. SEQ_NUM (b) 9 Sequence Number (1-13). b0:3 = Entry in sequence table (1-13). b4:7 = Word or line sync error. SEQ_TAB_ (b) 649 Sequence table serial used. SERIAL_N (b) 208759 Serial number of image. POW_STAT (b) 251 Power Status (0=off, 1=on). b7 = 5 Volts. b6 = 28 Volts. b5 = Filter Wheel. b4 = Shutter / Aspect Controller. b3 = Micro A Select. b2 = Micro B Select. b1 = Camera. b0 = Thermoelectric Cooler (TEC). SW_STAT (b) 160 Active Software (1=active). b7 = Quiet ARS on/off. b6 = Quiet ARS 1 or 2. b5 = Flare ARS on/off. b4 = ARS morning patrol on/off. b3 = AEC patrol on/off. b2 = ART on/off. b1 = ART. b0 = AR. SSXT_CON (b) 192 SXT Control Status. b7 = Power control mode (1=auto, 0=manual). b6 = SXT control mode (1=auto, 0=manual). b4:5 = SXT day/night mode. 00 = SXT day mode. 01 = SXT evening mode. 10 = SXT night mode. 11 = SXT morning mode. b1 = SXTE-U hard reset (1=executed). b0 = SXTE-U soft reset (1=executed). SXTFMT (b) 4 SXT Format info (FFI:PFI) 8:2 or 2:8. 4 or 12 : FFI dominant. 132 or 140 : PFI dominant. TEMP_CCD (b) 95 CCD Temperature. Referred by a SSW function, $SSW/yohkoh/gen/galileo/idl/lmsal/GT_TEMP_CDD.PRO. J_REGIST (b) 194 Which buffer is used. IMG_MAX (b) 255 Maximum intensity (0-255, high 8 bits). The image is decompressed first where necessary. IMG_AVG (b) 48 Average intensity of whole image (0-255, high 8 bits). The image is decompressed first where necessary. 1x1 - first subtract 12.8 DN offset. 2x2 - first subtract 30.7 DN offset. 4x4 - first subtract 73.6 DN offset. IMG_DEV (b) 227 Standard deviation of the whole image (0-255, Not scaled). The image is decompressed first where necessary PERCENTD (b) 255 Percentage of data present (value 255 = 100%). Referred by a SSW function, $SSW/yohkoh/gen/galileo/idl/lmsal/GT_PERCENTD.PRO. PERCENTO (b) 12 Percentage of data over [N] counts (value 255 = 100%). 1x1 - the # pixels over 2000 DN (decompressed). 2x2 - the # pixels over 3500 DN (decompressed). 4x4 - the # pixels over 3500 DN (decompressed). AEC_STAT (b) 0 Automatic Exposure Control status. (NOTE: True only for the LAST "PFI Strip" in an observing region.) b4:7 = Maximum number of selected regions in AT ARS1 (0-4). b2:3 = AEC Status of PFI-AEC. 00b = proper 01b = Over exposure 10b = Under exposure b0:1 = AEC Status of Patrol-AEC (see PFI-AEC above). EXTRA (b) 0 Spare bytes. LAT (c) -22.924700 Yohkoh orbit records interpolated to input times. Spacecraft Latitude (deg). LONG (c) 121.51300 Yohkoh orbit records interpolated to input times. Spacecraft Longitude (deg). HEIGHT (c) 727.99400 Yohkoh orbit records interpolated to input times. Spacecraft Altitude (Km). RADIUS (c) 7102.8400 Yohkoh orbit records interpolated to input times. Radius (km). RIG (c) 7.3237600 Yohkoh orbit records interpolated to input times. Rigidity (GV). TIM2FMS (c) 1746 Yohkoh ephemeris(FEM) records interpolated to input times. Seconds since the first minute of sun (FMS). TIM2NITE (c) 2241 Yohkoh ephemeris(FEM) records interpolated to input times. Seconds until the last minute of sun (LMS), ie., Spacecraft night. IN_SAA (c) 0 Yohkoh ephemeris(FEM) records interpolated to input times. set true if the image was taken in the South Atlantic Anomaly(SAA). DATE (c) '' (not used in YLA.) MJD (c) 49188 Modified Julian Day (long integer). Used in conjunction with TIME to provide efficient binary time representation. TIME_OBS (c) '' (not used in YLA.) DATE_OBS (c) '1993-07-20T03:57:53.465' The time and date of the start of the observation, in Earth-adjusted UT in CCSDS ASCII Calendar Segmented (ISO 8601). DATE_D$OBS (c) '' (not used in YLA.) FILENAME (c) 'sx3c_19930720_035753_121.fts' File name of the data. ORIGIN (c) '' (not used in YLA.) TELESCOP (c) 'Yohkoh' The name of the telescope, observatory, or mission (string). INSTRUME (c) 'SXT' The name of the specific instrument (string). OBJECT (c) '' (not used in YLA.) SCI_OBJ (c) '' (not used in YLA.) OBS_PROG (c) '' (not used in YLA.) EXPTIME (c) 1.0000000 The duration of the observation, in seconds (floating point). Permits calculation the "mean time" of an observation with the agreed standard for DATE_OBS. WAVELNTH (c) 'Al.1' Wavelength of observation (Name of analysis filter). CTYPE1 (c) '' Definition of the data units - ie., the interpretation of CDELT1 and CDELT2. CTYPE2 (c) '' Definition of the data units - ie., the interpretation of CDELT1 and CDELT2. CUNIT1 (c) 'arcsec' Units along the data axes, e.g. "arcsec", "deg". CUNIT2 (c) 'arcsec' Units along the data axes, e.g. "arcsec", "deg". CRPIX1 (c) 266.31000 The reference pixel coordinates. For example, if alignment is with respect to the lower left corner of the image, CRPIX1 and CRPIX2 should both be set to 1. If alignment is with respect to the center of the image, then CRPIX1 should be set to (NAXIS1+1)/2. CRPIX2 (c) 286.56000 The reference pixel coordinates. For example, if alignment is with respect to the lower left corner of the image, CRPIX1 and CRPIX2 should both be set to 1. If alignment is with respect to the center of the image, then CRPIX2 should be set to (NAXIS2+1)/2. CRVAL1 (c) 0.0000000 The reference data coordinates corresponding to CRPIX1. For example, if the pixel coordinates specify the origin, then set CRVAL1 to zero. CRVAL2 (c) 0.0000000 The reference data coordinates corresponding to CRPIX2. For example, if the pixel coordinates specify the origin, then set CRVAL2 to zero. CDELT1 (c) 4.9100000 The width (or height) of a pixel in data units. For square pixels, CDELT1 = CDELT2 CDELT2 (c) 4.9100000 The height (or width) of a pixel in data units. For square pixels, CDELT1 = CDELT2 XCEN (c) -48.167100 East-West (ie., direction of NAXIS1) FOV center of image relative to sun center in CDELT1 units, positive West. YCEN (c) -147.59500 North-South (ie., direction of NAXIS2) FOV center of image relative to sun center in CDELT2 units, positive North. CROTA1 (c) 0.51772200 Rotation angle of the image about the axis perpendicular to the plane of the image, through the point CRPIX1,CRPIX2. The rotation is specified in degrees CCW. If these fields are not specified, they are assumed to be zero. Set both CROTA1 and CROTA2 to the same value. CROTA2 (c) 0.51772200 Rotation angle of the image about the axis perpendicular to the plane of the image, through the point CRPIX1,CRPIX2. The rotation is specified in degrees CCW. If these fields are not specified, they are assumed to be zero. Set both CROTA1 and CROTA2 to the same value. SOLAR_R (c) 944.37600 Solar diameter in arcsec (geocentric value). SOLAR_B0 (c) 0.0000000 (not used in YLA.) SOLAR_L0 (c) 0.0000000 (not used in YLA.) SOLAR_P (c) 0.0000000 (not used in YLA.) DSUN_OBS (c) 1.5190858e+11 Distance to the Sun from the spacecraft in meter. For Yohkoh, well approximated by Sun-Earth distance. HGLN_OBS (c) 0.0000000 (not used in YLA.) HGLT_OBS (c) 0.0000000 (not used in YLA.) COMMENT (c) Array[5] (not used in YLA.) HISTORY (d) Array[90] calibration history. ---------------------------------------------------------------------------------------------------