Coordinate Frames

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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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