SECTION./AIRM
COMPUTE/AIRMASS frame [long] [lat]
COMPUTE/AIRMASS alpha delta ST [exptime] [long] [lat] [date] [UT]
	compute airmass (from sec z)
SECTION./BARY
COMPUTE/BARYCORR date UT alpha delta [longitude] [latitude]
COMPUTE/BARYCORR table.tbl [longitude] [latitude]
COMPUTE/BARYCORR image alpha delta [longitude] [latitude]
	correct universal times and radial velocities to center of sun or 
	barycenter of solar system
SECTION./COLU
COMPUTE/COLUMN res_frame.column = arithmetic_expression
	do arithmetics on columns of an image
SECTION./DIMA
COMPUTE/DIMAGE [outspec =] expression
	compute arithmetic expression
SECTION./DPIX
COMPUTE/DPIXEL [outspec =] expression
	compute expression on pixel basis
SECTION./DPLA
COMPUTE/DPLANE res_frame.plane = arithmetic_expression
	do arithmetics on planes of images
SECTION./HIST
COMPUTE/HISTOGRAM result = table col [bin [min [max]]]
	table-to-image or table-to-table histogram transformation
SECTION./IMAG
COMPUTE/IMAGE [outspec =] expression
	compute arithmetic expression
SECTION./KEYW
COMPUTE/KEYWORD key = arithmetic_expression
	compute values of a keyword
SECTION./PIXE
COMPUTE/PIXEL [outspec =] expression
	compute expression on pixel basis
SECTION./PLAN
COMPUTE/PLANE res_frame.plane = arithmetic_expression
	do arithmetics on planes of images
SECTION./PREC
COMPUTE/PRECESSION alpha delta equinox0 equinox1
COMPUTE/PRECESSION table.tbl equinox0 equinox1
	precess equatorial coordinates from one epoch to another
SECTION./REGR
COMPUTE/REGRESSION table column = name[(ind)]  [d_type]
	compute result of a regression
SECTION./ROW
COMPUTE/ROW res_frame.row = arithmetic_expression
	do arithmetics on rows (lines) of images
SECTION./SIGN
COMPUTE/SIGNATURE datafile [option] [FITSfile]
	compute the MD5 signature for the data of image or table
SECTION./ST
COMPUTE/ST date UT [longitude]
COMPUTE/ST table.tbl [longitude]
COMPUTE/ST image [longitude]
	calculate geocentric Julian date (JD) and local mean sidereal time (ST)
	from civil date and universal time (UT)
SECTION./TABL
COMPUTE/TABLE table column = expression
	compute arithmetic or string operations on table columns
SECTION./UT
COMPUTE/UT date ST [longitude]
COMPUTE/UT table.tbl [longitude]
COMPUTE/UT image [longitude]
	calculate geocentric Julian date (JD) and universal time (UT) from 
	civil date and local mean sidereal time (ST)
SECTION./WEIG
COMPUTE/WEIGHTS input_specs [window_specs]
	determine weights for command AVERAGE/WEIGHTS
SECTION./XYPL
COMPUTE/XYPLANE result_cube = expression
	compute arithmetic expression on xy_planes of cubes
SECTION./XZPL
COMPUTE/XZPLANE result_cube = expression
	compute arithmetic expression on xz_planes of cubes
SECTION./ZYPL
COMPUTE/ZYPLANE result_cube = expression
	compute arithmetic expression on zy_planes of cubes
