FITS Keywords for SXI M Level
1 Image products |
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2001-05-03 SMH |
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FITS Primary Header |
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FITS Keyword |
FITS Value Format |
Pass-through |
Contents |
Range |
Units |
Notes |
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SIMPLE |
logical |
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T, indicating FITS conformance |
T |
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BITPIX |
integer |
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Type indicator for Data Array |
-32 |
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NAXIS |
integer |
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Number of axes in Data Array |
2 |
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NAXIS1 |
integer |
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Length of Data Array Axis 1 |
512 |
pixels |
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NAXIS2 |
integer |
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Length of Data Array Axis 2 |
512 |
pixels |
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EXTEND |
logical |
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Indicates possibility of extension HDUs |
T |
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BLANK |
string |
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Undefined Data Array Value |
'NaN ' |
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DATE |
string |
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Date/time FITS file written |
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1 |
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FILENAME |
string |
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FITS file name, SXI convention |
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2 |
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CRPIX1 |
real |
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Reference column coordinate, pixel# |
256.5 |
pixels |
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CRPIX2 |
real |
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Reference row coordinate, pixel# |
256.5 |
pixels |
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CRVAL1 |
real |
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Reference column coordinate, arcsec |
0 |
arcsec |
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CRVAL2 |
real |
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Reference row coordinate, arcsec |
0 |
arcsec |
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CDELT1 |
real |
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Pixel width, arcsec |
5 |
arcsec |
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CDELT2 |
real |
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Pixel height, arcsec |
5 |
arcsec |
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CTYPE1 |
string |
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Definition of column data units |
'ARCSEC ' |
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CTYPE2 |
string |
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Definition of row data units |
'ARCSEC ' |
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CROTA |
real |
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Image rotation angle, degrees CCW |
[0,360] |
degrees |
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XCEN |
real |
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Center of Image relative to Center of Sun, N-S |
[-5400,5400] |
arcsec |
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YCEN |
real |
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Center of Image relative to Center of Sun, E-W |
[-5400,5400] |
arcsec |
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BZERO |
real |
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Intercept for conversion from DN to ph |
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photons |
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BSCALE |
real |
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Sllope for conversion from DN to ph |
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photons/DN |
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DATE_OBS |
string |
Yes |
Earth-adjusted time of observation, UT |
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1 |
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DATE-OBS |
string |
Yes |
Time of observation at S/C, UT |
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1 |
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TELESCOP |
real |
Yes |
Spacecraft identification |
'GOES-12 ' |
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INSTRUME |
string |
Yes |
Instrument identification |
'SXI-0 ' |
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OBJECT |
string |
Yes |
'SUN', 'DARK', 'UV_TEST', 'OFFPOINT' |
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IMG_CODE |
string |
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Image intent 'FL','AR','CS','CH','BG' etc. |
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VERINGST |
string |
Yes |
Level 0 ingest version 'nnn.nnn' |
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VERLEVL0 |
string |
Yes |
Level 0 processing version 'nnn.nnn' |
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LEVEL0ID |
string |
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Filename of input Level 0 image file |
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SHRTDARK |
string |
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Filename of short dark frame used |
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LONGDARK |
string |
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Filename of short dark frame used |
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VERLEVL1 |
string |
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Level 1 processing version |
1 |
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WAVELNTH |
string |
Yes |
Filter mnemonic |
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EXPTIME |
real |
Yes |
Actual Image integration time (sec) |
[0.0,65.536] |
seconds |
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MCP1K_V |
real |
Yes |
Actual MCP 1kV voltage |
[0,2125] |
volts |
3 |
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MCP5K_V |
real |
Yes |
Actual MCP 5kV (phosphor) voltage |
[0,10625] |
volts |
3 |
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RSLT_SFF |
string |
Yes |
Packed resultant SFF |
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IMAG_SFF |
string |
Yes |
Packed image SFF |
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GLBL_SFF |
string |
Yes |
Packed global SFF |
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LIN_LOG |
string |
Yes |
Linear/Logarithmic Output |
'LIN '.'LOG ' |
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LIN_DSBL |
logical |
Yes |
Disable Line Advance |
T,F |
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SAD_DSBL |
logical |
Yes |
Disable SADA Synchronization |
T,F |
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EXP_INDX |
integer |
Yes |
Exposure setting index |
314 |
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INT_TIME |
real |
Yes |
Integration time setting, s |
[0.0,65.535] |
seconds |
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SADA_OFF |
real |
Yes |
SADA offset time setting, s |
[0.0,8.191] |
seconds |
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MCP_GAIN |
real |
Yes |
MCP Gain setting, volts |
[0,2500] |
volts |
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MCP_PHOS |
real |
Yes |
MCP Phosphor setting, volts |
[0,12500] |
volts |
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MCP_TMP |
real |
Yes |
Ch 5, MCP Temperature Deg. C. |
[-273,577] |
Deg. C |
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CCD_TMP |
real |
Yes |
Ch 6, CCD Assembly Temperature Deg. C. |
[-273,577] |
Deg. C |
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IMG_WDI |
real |
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Image summed whole-disk intensity |
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TBD |
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IMG_MIN |
real |
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Image minimum intensity (units TBD) |
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TBD |
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IMG_MAX |
real |
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Image maximum intensity (units TBD) |
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TBD |
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IMG_MED |
real |
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Image median intensity (units TBD) |
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TBD |
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IMG_MEAN |
real |
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Image mean intensity (units TBD) |
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TBD |
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IMG_SDEV |
real |
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Image std dev intensity (units TBD) |
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TBD |
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MISS_PIX |
integer |
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Level-0 missing pixel count |
[0,???] |
pixels |
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MISS_LIN |
integer |
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Level-0 missing line count |
0 |
lines |
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FIX_PIX |
integer |
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Count of missing pixels that were filled in |
0 |
pixels |
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FIX_LIN |
integer |
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Count of missing lines that were filled in |
0 |
lines |
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MED_PIX |
integer |
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Count of median filter corrected pixels |
0 |
pixels |
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MED_THRS |
real |
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Threshold for meding filter correction |
0 |
TBD |
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SAT_PIX |
integer |
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Level-0 saturated pixel count |
0 |
pixels |
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FITS Primary Data Array - Pixel Data Array
- absent if NAXIS = 0 above |
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pixels |
32 bit IEEE Float |
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Pixels with parity errors (or missing) are set to
NaN. |
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TBD |
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Note 1 |
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The string has the form yyyy-mm-ddThh:mm:ss.sss |
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ISO 8601 Date/Time Strings |
The T between the date and the time is ugly, but part of the standard. |
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The seconds field provides millisecond precision. |
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Smoothed UTC is always used. Z
is not appended to the string. |
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Note 2 |
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The string has the form prdctn_yyyymmdd_hhmmss_AA_12, where |
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Sxi Product File Names |
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prdctn is the 3-6 character product
name: SXI, MCPSI, UVBI, or XPDIAG |
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The yyyymmdd_hhmmss field is derived from the DATE_OBS value. |
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The two letters of the AA field are codes for the processing level
and software version. |
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Note 3 |
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Value undefined if there was no Tsync packet. |
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