Prime Keys are:
	ObsTime
DB Index Keys are same as Prime Keys
All Keywords for series sha.GONGbbvzi:
	SITE      	(string)	GONG site code
	SITENAME  	(string)	Keyword:
	TIMEZONE  	(int)	Time zone
	LAT       	(double)	Geographic latitude of Obsrvr (some +0.597829
	LON       	(double)	Geographic longitude of Obsrvr
	DTYPE     	(string)	Data Type
	ITIME     	(float)	time between EOI interrupts for OBS type
	PIXLENX   	(float)	Relative pixel size, x-direction
	PIXLENY   	(float)	Relative pixel size, y-direction
	P_ANGLE   	(float)	Nominal position angle - pi/2
	OFFSET    	(float)	Nominal position angle
	ObsTime   	(time)	midpoint of observation
	URL       	(string)	URL for record segment
	VELSCALE  	(float)	velocity scaling: (v_sun + VEL_BIAS) / v_obs
	VEL_BIAS  	(float)	velocity bias: VELSCALE * v_obs - v_sun
	Date_Obs  	(string)	GONG DATE-OBS
	Time_Obs  	(string)	GONG TIME-OBS
	HA        	(double)	Hour angle
	B0        	(double)	Heliographic latitude of Earth center
	L0        	(double)	Heliographic longitude of Earth center
	RADIUS    	(double)	Apparent solar radius
	SEMIDIAM  	(double)	Apparent solar semidiameter
	C_MA      	(double)	Image ellipse semimajor axis
	C_MI      	(double)	Image ellipse semiminor axis
	FNDLMBAN  	(double)	Position angle of image ellipse major axis
	FNDLMBXC  	(double)	Image center column 1-indexed
	FNDLMBYC  	(double)	Image center row 1-indexed
	SolarPA   	(float)	position angle of Carrington axis