Prime Keys are: T_REC is slotted 'ts_eq' using T_REC_index CAMERA DB Index Keys are: T_REC_index CAMERA All Keywords for series hmi.S_720s: DATE (time) Date_time of processing; ISO 8601 format UTC DATE__OBS (time) [DATE-OBS] DATE_OBS = T_OBS - EXPTIME/2.0 TELESCOP (string) For HMI: SDO/HMI INSTRUME (string) For HMI: HMI_SIDE1, HMI_FRONT2, or HMI_COMBINED WAVELNTH (float) For HMI: 6173.3 Angstroms CAMERA (int) For HMI: 1 (side camera), 2 (front camera), or 3 (both cameras) BUNIT (string) BUNIT: physical units of data, DN/s ORIGIN (string) ORIGIN: location where file made CONTENT (string) CONTENT: LEVEL 1p IMAGE QUALITY (int) Level 1p Quality word QUALLEV1 (int) Logical OR on the bits of the level 1 Quality word HISTORY (string) processing history of data COMMENT (string) commentary on the data BLD_VERS (int) Code release build number of program that created this record HCAMID (int) HMI_SEQ_ID_EXP_PATH SOURCE (string) level 1 filtergrams used to produce the observables TOTVALS (int), per-segment Expected number of data values (pixels) DATAVALS (int), per-segment Actual number of data values in images (pixels) MISSVALS (int), per-segment Missing values: TOTVALS - DATAVALS DATAMIN2 (float), per-segment Minimum value from all pixels DATAMAX2 (float), per-segment Maximum value from all pixels DATAMED2 (float), per-segment Median value from all pixels DATAMEA2 (float), per-segment Mean value from all pixels DATARMS2 (float), per-segment Rms deviation from the mean value of all pixels DATASKE2 (float), per-segment Skewness from the mean value of all pixels DATAKUR2 (float), per-segment Kurtosis of all pixels DATAMIN (float), per-segment Minimum value from pixels within 99% of solar radius DATAMAX (float), per-segment Maximum value from pixels within 99% of solar radius DATAMEDN (float), per-segment Median value from pixels within 99% of solar radius DATAMEAN (float), per-segment Mean value from pixels within 99% of solar radius DATARMS (float), per-segment Rms deviation from the mean value of pixels within 99% of solar radius DATASKEW (float), per-segment Skewness from the mean value of pixels within 99% of solar radius DATAKURT (float), per-segment Kurtosis of pixels within 99% of solar radius CTYPE1 (string) CTYPE1: HPLN-TAN (SOLARX) CTYPE2 (string) CTYPE2: HPLT-TAN (SOLARY) CRPIX1 (float) CRPIX1: location of the Sun center in CCD x direction CRPIX2 (float) CRPIX2: location of the Sun center in CCD y direction CRVAL1 (float) CRVAL1: x origin - center of the solar disk CRVAL2 (float) CRVAL2: y origin - center of the solar disk CDELT1 (float) image scale in the x direction CDELT2 (float) image scale in the y direction CUNIT1 (string) CUNIT1: arcsec CUNIT2 (string) CUNIT2: arcsec CROTA2 (float) CROTA2: INST_ROT + SAT_ROT CRDER1 (float) CRDER1: estimate of random error in coordinate x CRDER2 (float) CRDER2: estimate of random error in coordinate y CSYSER1 (float) CSYSER1: estimate of systematic error in coordinate x CSYSER2 (float) CSYSER2: estimate of systematic error in coordinate y WCSNAME (string) WCS system name DSUN_OBS (double) Distance from SDO to Sun center. DSUN_REF (double) Astronomical Unit RSUN_REF (double) Reference radius of the Sun: 696,000,000.0 m CRLN_OBS (float) Carrington longitude of the observer CRLT_OBS (float) Carrington latitude of the observer CAR_ROT (int) Carrington rotation number of CRLN_OBS OBS_VR (double) velocity of the observer in radial direction. + is away from Sun OBS_VW (double) velocity of the observer solar-westward. + in rough direction of Earth orbit OBS_VN (double) velocity of the observer solar-northward (heliographic). + to north RSUN_OBS (double) angular radius of Sun. Corresponds to arcsin(RSUN_REF/DSUN_OBS) T_OBS (time) nominal time T_REC (time) Slot time T_REC_epoch (time) Time of origin T_REC_step (float) ts_eq step T_REC_unit (string) ts_eq unit CADENCE (float) repetition interval HFLID (int) HMI_SEQ_ID_FRAMELIST HCFTID (int) HMI_SEQ_ID_FOCUS QLOOK (int) QLOOK: 0=final data, 1=quick-look data HWLTID (int) HWLTID of target filtergram HPLTID (int) HPLTID of target filtergram WAVELNID (int) WavelengthID of target filtergram TSEL (float) temperature keyword for polarization calibration TFRONT (float) temperature keyword for polarization calibration TINTNUM (int) number of points used for the temporal interpolation SINTNUM (int) number of points used for the spatial interpolation DISTCOEF (string) path to the distortion coefficient table used to produce the data ROTCOEF (string) path to the differential-rotation coefficient table used to produce the data ODICOEFF (int) order of the distortion-coefficient polynomials OROCOEFF (int) order of the differential-rotation polynomials POLCALM (int) method used by the polarization calibration subroutine CODEVER0 (string) version of the time-averaged IQUV code used to produce the data CODEVER1 (string) version of the gapfilling subroutine used to produce the data CODEVER2 (string) version of the temporal interpolation subroutine used to produce the data CODEVER3 (string) version of the polarization calibration subroutine used to produce the data CALVER64 (longlong) Calibration Version Segments for series hmi.S_720s: I0 DN/s fits 4096x4096 level 1p data; Stokes I @ WL 0 Q0 DN/s fits 4096x4096 level 1p data; Stokes Q @ WL 0 U0 DN/s fits 4096x4096 level 1p data; Stokes U @ WL 0 V0 DN/s fits 4096x4096 level 1p data; Stokes V @ WL 0 I1 DN/s fits 4096x4096 level 1p data; Stokes I @ WL 1 Q1 DN/s fits 4096x4096 level 1p data; Stokes Q @ WL 1 U1 DN/s fits 4096x4096 level 1p data; Stokes U @ WL 1 V1 DN/s fits 4096x4096 level 1p data; Stokes V @ WL 1 I2 DN/s fits 4096x4096 level 1p data; Stokes I @ WL 2 Q2 DN/s fits 4096x4096 level 1p data; Stokes Q @ WL 2 U2 DN/s fits 4096x4096 level 1p data; Stokes U @ WL 2 V2 DN/s fits 4096x4096 level 1p data; Stokes V @ WL 2 I3 DN/s fits 4096x4096 level 1p data; Stokes I @ WL 3 Q3 DN/s fits 4096x4096 level 1p data; Stokes Q @ WL 3 U3 DN/s fits 4096x4096 level 1p data; Stokes U @ WL 3 V3 DN/s fits 4096x4096 level 1p data; Stokes V @ WL 3 I4 DN/s fits 4096x4096 level 1p data; Stokes I @ WL 4 Q4 DN/s fits 4096x4096 level 1p data; Stokes Q @ WL 4 U4 DN/s fits 4096x4096 level 1p data; Stokes U @ WL 4 V4 DN/s fits 4096x4096 level 1p data; Stokes V @ WL 4 I5 DN/s fits 4096x4096 level 1p data; Stokes I @ WL 5 Q5 DN/s fits 4096x4096 level 1p data; Stokes Q @ WL 5 U5 DN/s fits 4096x4096 level 1p data; Stokes U @ WL 5 V5 DN/s fits 4096x4096 level 1p data; Stokes V @ WL 5