Prime Keys are:
	T_REC is slotted 'ts_eq' using T_REC_index
	I_DREC
DB Index Keys are same as Prime Keys
All Keywords for series mdi.detune:
	T_REC     	(time)	Observation Reference time
	I_DREC    	(short)	Record number within day
	T_OBS     	(time)	Actual (center) of integration time
	DATE__OBS 	(time)	[DATE-OBS]
	RECORD    	(short)	Record number in calibration sequence
	OBSMODE   	(string)	Observing Mode
	MDI_CAL1  	(short)	Mode/Focus Wheel 1 position
	MDI_CAL2  	(short)	Mode/Focus Wheel 2 position
	MDI_MTM1  	(short)	Michelson Tuning Motor 1 position
	MDI_MTM2  	(short)	Michelson Tuning Motor 2 position
	RLC_MTM1  	(short)	Michelson Tuning Motor 1 position rel. to line center (nominal)
	RLC_MTM2  	(short)	Michelson Tuning Motor 2 position rel. to line center (nominal)
	TRG_MTM1  	(string)	Michelson Tuning Motor 1 wavelength target (FC: continuum)
	TRG_MTM2  	(string)	Michelson Tuning Motor 2 wavelength target (FC: continuum)
	MDI_EXP   	(short)	Exposure (1: HALF; 5: STD; 6: STDHR)
	ITYPE     	(string)	Light Path (Full-Disk, High-Res, Dark)
	OBSNAME   	(string)	Observation type
	MDI_X0    	(float)	Sun ctr on coeval 1024^2 img @ 2"/pix (axis 1) (CRPIX1-1)
	MDI_Y0    	(float)	Sun ctr on coeval 1024^2 img @ 2"/pix (axis 2) (CRPIX2-1)
	CROTA2    	(float)	Position angle of the solar north pole measured westward (clockwise) from positive y-axis
	CAR_ROT   	(int)	Carrington rotation number for CRLN_OBS
	CRLN_OBS  	(float)	Heliographic longitude of the observer's disk center
	CRLT_OBS  	(float)	Heliographic latitude of the observer's disk center
	DSUN_OBS  	(double)	Distance from SOHO/MDI to Sun center
	OBS_VR    	(double)	Radial velocity of observer; positive is away from Sun
	OBS_VW    	(double)	'Westward' velocity of observer; positive is in direction of Earth orbit
	OBS_VN    	(double)	'Northward' velocity of observer; positive is in direction of solar north
	RSUN_OBS  	(double)	Apparent semi-diameter of the Sun in arcseconds from SOHO
	EARTH_DT  	(float)	Delay time between T_OBS and T_EARTH (T_EARTH=T_OBS+EARTH_DT)
	QUALITY   	(int)	Status Summary; 0: no known problems; <0: no data
	DATAVALS  	(int)	Number of non-missing values in data record
	MISSVALS  	(int)	Number of missing values in data record
	DATAMIN   	(float)	Minimum value of data
	DATAMAX   	(float)	Maximum value of data
	DATAMEDN  	(float)	Median value of data
	DATAMEAN  	(float)	Mean value of data 
	DATARMS   	(float)	RMS value of data
	DATASKEW  	(float)	Skew; 3rd moment in distribution
	DATAKURT  	(float)	Kurtosis; 4th moment in distribution
	DPC       	(int)	MDI Data Product Code
	DATE      	(time)	Date of ingest into DRMS
	SOURCE    	(string)	DSDS data source
	BLDVER15  	(string)	Code release build number of program that created this record
	TBLXYUPD  	(time)	Pointing table last modification date
	HISTORY   	(string)	Processing History of Data
	MDI_PAW   	(short)	Polarization Analyzer position (0: STD = linear)
	CONTENT   	(string)	Type of data
	COMMENT   	(string)	Commentary on the data
	INSTRUME  	(string)	Instrument
	TELESCOP  	(string)	Observatory (Spacecraft)
	WAVELNTH  	(int)	Nominal line wavelength
	ORIGIN    	(string)	Organization that created FITS file
	ROLL_TBL  	(string)	Name of DRMS series containing roll angle table.
	XY_FROM   	(string)	Source of pointing information
	T_REC_epoch	(time)	
	T_REC_step	(float)	T_REC step
Segments for series mdi.detune:
	data      	Arbitrary intensity units	   fits	256x256	Camera value