Prime Keys are: T_REC is slotted 'ts_eq' using T_REC_index DB Index Keys are: T_REC_index All Keywords for series hmi.Marmask_720s: DATE (time) Date_time of processing; ISO 8601 format UTC 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 CONTENT (string) CONTENT: full disk bytemap HISTORY (string) processing history of data COMMENT (string) commentary on the data BLD_VERS (string) Code release build number of program that created this record QUALITY (int) Level 1.5 Quality word QUALLEV1 (int) Logical OR on the bits of the level 1 Quality word 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) CADENCE (float) repetition interval DATASIGN (int) DATASIGN: sign of observable quantity wrt Sun center 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 (float) Astronomical Unit RSUN_REF (float) 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) TOTVALS (int) Expected number of data values (pixels) DATAVALS (int) Actual number of data values in images (pixels) MISSVALS (int) Missing values: TOTVALS - DATAVALS SATVALS (int) Saturated values OFFDISK (int) Mask value for off-disk pixels QUIET (int) Mask value for quiet sun pixels ACTIVE (int) Mask value for active region pixels NCLASS (int) Total number of distinct values allowed for this mask ON_PATCH (int) Bit mask indicating a pixel is close to an AR AR_NPIX (int) Number of active region (AR) pixels in the mask AR_SIZE (float) Projected area of AR pixels on image in micro-hemisphere AR_AREA (float) De-projected area of AR pixels on sphere in micro-hemisphere AR_MTOT (float) Sum of absolute LoS flux within all AR pixels AR_MNET (float) Net LoS flux within all AR pixels AR_MPOS (float) Absolute value of total positive LoS flux in AR pixels AR_MNEG (float) Absolute value of total negative LoS flux in AR pixels AR_MMEAN (float) Mean of LoS flux density over AR pixels AR_MSDEV (float) Standard deviation of LoS flux density over AR pixels AR_MSKEW (float) Skewness of LoS flux density over AR pixels AR_MKURT (float) Kurtosis of LoS flux density (Gaussian = 0) over AR pixels ARM_QUAL (int) Quality of the mask (bitfield) ARM_NCLN (int) Number of limb pixels reset to quiet (annulus width ARM_EDGE) ARMCODEV (string) ARmask code version ARMDOCU (string) ARmask code documentation ARM_ITER (string) ARmask parameter: Iteration-count parameter vector ARM_TEMP (string) ARmask parameter: Annealing computational temperature ARM_ALFA (string) ARmask parameter: Alpha (per-class prior log-probability) ARM_MODL (string) ARmask parameter: Classification model name ARM_EDGE (float) ARmask parameter: Width of annulus at limb to possibly reset (pixels) ARM_BETA (string) ARmask parameter: Mask spatial smoothness ARM_RHO (float) ARmask parameter: Mask smoothness distance weighting ARM_KPAR (float) ARmask parameter: AR patch grouping smoothing kernel width ARM_KWT (string) ARmask parameter: AR patch grouping anisotropy ARM_THRS (float) ARmask parameter: AR patch grouping threshold DATE__OBS (time) [DATE-OBS] DATE_OBS = T_OBS - EXPTIME/2.0 HFLID (int) HMI_SEQ_ID_FRAMELIST HCFTID (int) HMI_SEQ_ID_FOCUS QLOOK (int) QLOOK: 0=final data, 1=quick-look data TINTNUM (int) number of points used for the temporal averaging 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 POLCALM (int) method used by the polarization calibration subroutine CODEVER0 (string) version of the l.o.s. observable code used for the magnetogram CODEVER1 (string) version of the gapfilling subroutine used for the magnetogram CODEVER2 (string) version of the temporal interpolation subroutine used for the magnetogram CODEVER3 (string) version of the polarization calibration subroutine used for the magnetogram ICCODEV0 (string) version of the l.o.s. observable code used for the intensitygram ICCODEV1 (string) version of the gapfilling subroutine used for the intensitygram ICCODEV2 (string) version of the temporal interpolation subroutine used for intensitygram ICCODEV3 (string) version of the polarization calibration subroutine used for intensitygram ICCODEV4 (string) version of the limb darkening removal program. COEF_VER (string) version of the limb darkening coeficients. LDCoef0 (float) limb darkening coeficient 0. LDCoef1 (float) limb darkening coeficient 1. LDCoef2 (float) limb darkening coeficient 2. LDCoef3 (float) limb darkening coeficient 3. LDCoef4 (float) limb darkening coeficient 4. LDCoef5 (float) limb darkening coeficient 5. CALVER64 (longlong) Calibration Version Segments for series hmi.Marmask_720s: mask Enumerated fits VARxVAR Activity mask link through MDATA Original magnetogram link through PDATA Original continuum intensity Links for series hmi.Marmask_720s: MDATA STATIC hmi.M_720s input magnetic data PDATA STATIC hmi.Ic_noLimbDark_720s input continuum intensity data