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.vw_V_45s:
	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  	(int)	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, m/s
	ORIGIN    	(string)	ORIGIN: location where file made
	CONTENT   	(string)	CONTENT: DOPPLERGRAM
	QUALITY   	(int)	Level 1.5 Quality word
	TOTVALS   	(int)	Expected number of data values (pixels)
	DATAVALS  	(int)	Actual number of data values in images (pixels)
	MISSVALS  	(int)	Missing values: TOTVALS - DATAVALS
	DATAMIN   	(float)	Minimum value from all pixels
	DATAMAX   	(float)	Maximum value from all pixels
	DATAMEDN  	(float)	Median value from all pixels
	DATAMEAN  	(float)	Mean value from all pixels
	DATARMS   	(float)	Rms deviation from the mean value of all pixels
	DATASKEW  	(float)	Skewness from the mean value of all pixels
	DATAKURT  	(float)	Kurtosis of all pixels
	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
	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; MDI EPOCH
	T_REC_step	(float)	ts_eq step
	T_REC_unit	(string)	ts_eq unit
	CADENCE   	(float)	repetition interval
	DATASIGN  	(int)	DATASIGN: sign of observable quantity wrt Sun center
	CALVER64  	(longlong)	Calibration Version
Segments for series hmi.vw_V_45s:
	dopplergram	    m/s	    tas	204x204	vector-weighted dopplergram
Links for series hmi.vw_V_45s:
	HISTORY   	STATIC	hmi.globalhs_history	processing history
	SRCDATA   	STATIC	hmi.V_45s	source data