Metadata Description

Each PUNCH FITS file contains metadata in the form of a FITS-compliant header, describing the accompanying data observation.

Header keywords

KEYWORD	COMMENT
SIMPLE	Conforms to FITS Standard
BITPIX	Number of bits per pixel
NAXIS	Number of axes
NAXIS1	Length of the first axis
NAXIS2	Length of the second axis
NAXIS3	Length of the third axis
EXTNAME	Name of this binary table extension
LONGSTRN	The OGIP long string convention may be used
DOI	Data reference DOI
PROJECT	PUNCH
TITLE	PUNCH Level-0 WFI-1 Clear Image
KEYVOCAB	Unified Astronomy Thesaurus Keywords
KEYWORDS	Solar Corona (1483), Solar K Corona (2042), Solar F Corona (1991), Solar Coronal Streamers (1486), Solar Coronal Plumes (2039), Solar Wind (1534), Fast Solar Wind (1872), Slow Solar Wind (1873), Solar Coronal Mass Ejection (310), Heliosphere (711), Polarimetry (1278)
LICENSE	Creative Commons Attribution 4.0 International | CC BY 4.0
DESCRPTN	PUNCH Level-0 data, Uncalibrated instrumental units in camera coordinates
DOC_URL	https://punch.spaceops.swri.org
FILENAME	Name of file
LEVEL	Product Level
OBSTYPE	Plain text observation
TYPECODE	Observation product type code
OBSCODE	Observatory spacecraft code
PIPEVRSN	punchbowl software version number
FILEVRSN	File version number
FILE_RAW	Raw telemetry filename
ORIGIN	Institution responsible for creating the file
TIMESYS	Principal time system
DATE-BEG	UTC time observation
DATE-OBS	UTC reference time
DATE-AVG	UTC reference time
DATE-END	UTC time of observation end
DATE	UTC file generation date and time
WAVELNTH	[nm] average peak response
WAVEUNIT	Unit of observation measurement
FILTER	Name of filter for observations
OBS-MODE	Image Mode (Unpolarized, Polar_MZP, Polar_BpB)
OBSLAYR1	Image Mode for first datacube layer
OBSLAYR2	Image Mode for second datacube layer
OBSLAYR3	Image Mode for third datacube layer
POLAR	[deg] Polarizer angle or fill value for clear
POLAROFF	[deg] Offset in degrees of polarizer from POLAR
POLARREF	Polarizer reference frame (instrument or solar)
INSTRUME	Instrument name
TELESCOP	Satellite name
OBSRVTRY	Observatory name
OBJECT	Object observed
DETECTOR	CCD detector 2048x2048 pixels
EXPTIME	[s] commanded exposure time
OBT_BEG	MET when first pixel of first image received
OBT_END	MET when first pixel of last image is received
NSUMEXP	total number images stacked on onboard
NSUMBAD	number of images with invalid pixel counts
READTIME	[s] time to readout raw image from camera
TELAPSE	[s] time between begin and end of exposure
REGION	region
READOUT0	readout region if region=0
CAMERA	detector name
PXBEG1	first read-out detector row
PXEND1	last read-out detector row
PXBEG2	first read-out detector column
PXEND2	last read-out detector column
NBIN1	number of pixels binned along axis1
NBIN2	number of pixels binned along axis2
NBIN	number of pixels binned
DSTART1	first column of image array on data array
DSTOP1	last column of image array on data array
DSTART2	first row of image area on data array
DSTOP2	last row of image area on data array
IMGCTR	image counter from IDPU
LEDSTATE	state of LED
LEDDAC	last commanded setting of LED
OFFSET	commanded offset value used in camera
GAINCMD	commanded gain value
XFBYTES	number of bytes sent
RAWBITS	[bits] raw image bits per pixel
COMPBITS	[bits] compressed image bits per pixel
SQRTCODE	square-root coding table name
COMPRESS	image compression type
COMP_RAT	compressed/uncompressed data ratio
CALCF	quartic fit filename
CALVI	vignetting filename
CALPSF	PSF filename
CALPM	bad pixel map filename
CALSL	stray light model filename
BUNIT	Units of observation
BSUN_DEF	[W/m2/sr] Mean Solar Brightness
DATAZER	number of pixels=0
DATASAT	number of saturated pixels
DSATVAL	saturation value in calibrated units
DATAAVG	average non-zero pixel value
DATAMDN	median non-zero pixel value
DATASIG	standard deviation of non-zero pixels
DATAP01	1% of non-zero pixels are LE this value
DATAP10	10% of non-zero pixels are LE this value
DATAP25	25% of non-zero pixels are LE this value
DATAP50	50% of non-zero pixels are LE this value
DATAP75	75% of non-zero pixels are LE this value
DATAP90	90% of non-zero pixels are LE this value
DATAP95	95% of non-zero pixels are LE this value
DATAP98	98% of non-zero pixels are LE this value
DATAP99	99% of non-zero pixels are LE this value
DATAMIN	minimum valid physical value
DATAMAX	maximum valid physical value
RSUN_ARC	[arcsec] photospheric solar radius
RSUN_REF	[m] assumed physical solar radius
SOLAR_EP	[deg] S/C ecliptic North to solar North angle
CAR_ROT	Carrington Rotation number
GEOD_LAT	[deg] S/C sub-point geodetic latitude
GEOD_LON	[deg] S/C sub-point longitude
GEOD_ALT	[m] S/C WGS84 altitude
LOS_ALT	[m] line-of-sight altitude above Earth
HGLT_OBS	[deg] S/C heliographic latitude
HGLN_OBS	[deg] S/C heliographic longitude (B0)
CRLT_OBS	[deg] S/C Carrington latitude (B0)
CRLN_OBS	[deg] S/C Carrington longitude
DSUN_OBS	[m] S/C distance from Sun
HEEX_OBS	[m] S/C Heliocentric Earth Ecliptic X
HEEY_OBS	[m] S/C Heliocentric Earth Ecliptic Y
HEEZ_OBS	[m] S/C Heliocentric Earth Ecliptic Z
HCIX_OBS	[m] S/C Heliocentric Inertial X
HCIY_OBS	[m] S/C Heliocentric Inertial Y
HCIZ_OBS	[m] S/C Heliocentric Inertial Z
HCIX_VOB	[m/s] S/C Heliocentric Inertial X Velocity
HCIY_VOB	[m/s] S/C Heliocentric Inertial Y Velocity
HCIZ_VOB	[m/s] S/C Heliocentric Inertial Z Velocity
HAEX_OBS	[m] S/C Heliocentric Aries Ecliptic X
HAEY_OBS	[m] S/C Heliocentric Aries Ecliptic Y
HAEZ_OBS	[m] S/C Heliocentric Aries Ecliptic Z
HEQX_OBS	[m] S/C Heliocentric Earth Equatorial X
HEQY_OBS	[m] S/C Heliocentric Earth Equatorial Y
HEQZ_OBS	[m] S/C Heliocentric Earth Equatorial Z
DELTAT	Time offset in frames between images
SPARSITY	Frame skip interval for averaging
N_OFS	Number of spatial offsets for cross-correlation
DELTA_PX	Pixel offset increment per sample
KPSEXP	Expected wind speed in km/s
BANDWDTH	Half-width of each radial band in solar radii
MAXRAD	The maximum radius in degrees
AZMBINS	Number of azimuthal bins in the polar remapped images
AZMBINF	Azimuthal binning factor
PLTBINS	Number of azimuthal bins in the output flow maps
YCENS	Radial band centers in solar radii
RBANDS	Indices of radial bands to visualize
CHECKSUM
DATASUM	0
HISTORY	Records of processing from pipeline