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INTERACTIVE KEYSTROKE COMMANDS

?	Print help
:	Execute colon command
spbar	Measure object
q	Exit task


	COLON COMMANDS

:show				Show the input and output coordinate systems
:isystem	[string]	Show / set the input coordinate system
:osystem	[string]	Show / set the output coordinate system
:ounits		[string string]	Show / set the output coordinate units
:oformat	[string string]	Show / set the output coordinate format

	VALID INPUT COORDINATE SYSTEMS

image [tv]

	VALID OUTPUT COORDINATE SYSTEMS

image [logical/tv/physical/world]
equinox [epoch]
noefk4 [equinox [epoch]]
fk4 [equinox [epoch]]
fk5 [equinox [epoch]]
icrs [equinox [epoch]]
apparent epoch
ecliptic epoch
galactic [epoch]
supergalactic [epoch]

	VALID OUTPUT CELESTIAL COORDINATE UNITS AND THEIR DEFAULT FORMATS

hours		%12.3h
degrees		%12.2h
radians         %13.7g