Coordinate Frames

J2000	-- mean equator and equinox at J2000.0 (FK5)
JNAT	-- geocentric natural frame
JMEAN	-- mean equator and equinox at frame epoch
JTRUE	-- true equator and equinox at frame epoch
APP	-- apparent geocentric position
B1950	-- mean epoch and ecliptic at B1950.0. The epoch is taken from the frame epoch; or from the aipsrc variable measures.b1950.d_epoch; or has default 2000.0
B1950_VLA	-- mean epoch(1979.9)) and ecliptic at B1950.0
BMEAN	-- mean equator and equinox at frame epoch
BTRUE	-- true equator and equinox at frame epoch
GALACTIC	-- galactic coordinates
HADEC	-- topocentric HA and declination
AZEL	-- topocentric Azimuth and Elevation (N through E)
AZELSW	-- topocentric Azimuth and Elevation (S through W)
AZELNE	-- topocentric Azimuth and Elevation (N through E)
AZELGEO	-- geodetic Azimuth and Elevation (N through E)
AZELSWGEO	-- geodetic Azimuth and Elevation (S through W)
AZELNEGEO	-- geodetic Azimuth and Elevation (N through E)
ECLIPTC	-- ecliptic for J2000 equator and equinox
MECLIPTIC	-- ecliptic for mean equator of date
TECLIPTIC	-- ecliptic for true equator of date
SUPERGAL	-- supergalactic coordinates
ITRF	-- coordinates wrt ITRF Earth frame
TOPO	-- apparent topocentric position
ICRS	-- International Celestial reference system

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