#EN-UCDlist-v1.5-2023-01-25
Q | arith                             |  Arithmetic quantities
S | arith.diff                        |  Difference between two quantities described by the same UCD
P | arith.factor                      |  Numerical factor
P | arith.grad                        |  Gradient
P | arith.rate                        |  Rate (per time unit)
S | arith.ratio                       |  Ratio between two quantities described by the same UCD
S | arith.squared                     |  Squared quantity
S | arith.sum                         |  Summed or integrated quantity
S | arith.variation                   |  Generic variation of a quantity
Q | arith.zp                          |  Zero point
S | em                                |  Electromagnetic spectrum
S | em.IR                             |  Infrared part of the spectrum
S | em.IR.J                           |  Infrared between 1.0 and 1.5 micron
S | em.IR.H                           |  Infrared between 1.5 and 2 micron
S | em.IR.K                           |  Infrared between 2 and 3 micron
S | em.IR.3-4um                       |  Infrared between 3 and 4 micron
S | em.IR.4-8um                       |  Infrared between 4 and 8 micron
S | em.IR.8-15um                      |  Infrared between 8 and 15 micron
S | em.IR.15-30um                     |  Infrared between 15 and 30 micron
S | em.IR.30-60um                     |  Infrared between 30 and 60 micron
S | em.IR.60-100um                    |  Infrared between 60 and 100 micron
S | em.IR.NIR                         |  Near-Infrared, 1-5 microns
S | em.IR.MIR                         |  Medium-Infrared, 5-30 microns
S | em.IR.FIR                         |  Far-Infrared, 30-100 microns
S | em.UV                             |  Ultraviolet part of the spectrum
S | em.UV.10-50nm                     |  Ultraviolet between 10 and 50 nm EUV extreme UV
S | em.UV.50-100nm                    |  Ultraviolet between 50 and 100 nm
S | em.UV.100-200nm                   |  Ultraviolet between 100 and 200 nm FUV Far UV
S | em.UV.200-300nm                   |  Ultraviolet between 200 and 300 nm NUV near UV
S | em.X-ray                          |  X-ray part of the spectrum
S | em.X-ray.soft                     |  Soft X-ray (0.12 - 2 keV)
S | em.X-ray.medium                   |  Medium X-ray (2 - 12 keV)
S | em.X-ray.hard                     |  Hard X-ray (12 - 120 keV)
Q | em.bin                            |  Channel / instrumental spectral bin coordinate (bin number)
Q | em.energy                         |  Energy value in the em frame
Q | em.freq                           |  Frequency value in the em frame
Q | em.freq.cutoff                    |  cutoff frequency
Q | em.freq.resonance                 |  resonance frequency
S | em.gamma                          |  Gamma rays part of the spectrum
S | em.gamma.soft                     |  Soft gamma ray (120 - 500 keV)
S | em.gamma.hard                     |  Hard gamma ray (>500 keV)
S | em.line                           |  Designation of major atomic lines
S | em.line.HI                        |  21cm hydrogen line
S | em.line.Lyalpha                   |  H-Lyalpha line
S | em.line.Halpha                    |  H-alpha line
S | em.line.Hbeta                     |  H-beta line
S | em.line.Hgamma                    |  H-gamma line
S | em.line.Hdelta                    |  H-delta line
S | em.line.Brgamma                   |  Bracket gamma line
S | em.line.OIII                      |  [OIII] line whose rest wl is 500.7 nm
S | em.line.CO                        |  CO radio line, e.g., 12CO(1-0) at 115GHz
S | em.mm                             |  Millimetric/submillimetric part of the spectrum
S | em.mm.30-50GHz                    |  Millimetric between 30 and 50 GHz
S | em.mm.50-100GHz                   |  Millimetric between 50 and 100 GHz
S | em.mm.100-200GHz                  |  Millimetric between 100 and 200 GHz
S | em.mm.200-400GHz                  |  Millimetric between 200 and 400 GHz
S | em.mm.400-750GHz                  |  Millimetric between 400 and 750 GHz
S | em.mm.750-1500GHz                 |  Millimetric between 750 and 1500 GHz
S | em.mm.1500-3000GHz                |  Millimetric between 1500 and 3000 GHz
S | em.opt                            |  Optical part of the spectrum
S | em.opt.U                          |  Optical band between 300 and 400 nm
S | em.opt.B                          |  Optical band between 400 and 500 nm
S | em.opt.V                          |  Optical band between 500 and 600 nm
S | em.opt.R                          |  Optical band between 600 and 750 nm
S | em.opt.I                          |  Optical band between 750 and 1000 nm
S | em.pw                             |  Plasma waves (trapped in local medium)
S | em.radio                          |  Radio part of the spectrum
S | em.radio.20MHz                    |  Radio below 20 MHz
S | em.radio.20-100MHz                |  Radio between 20 and 100 MHz
S | em.radio.100-200MHz               |  Radio between 100 and 200 MHz
S | em.radio.200-400MHz               |  Radio between 200 and 400 MHz
S | em.radio.400-750MHz               |  Radio between 400 and 750 MHz
S | em.radio.750-1500MHz              |  Radio between 750 and 1500 MHz
S | em.radio.1500-3000MHz             |  Radio between 1500 and 3000 MHz
S | em.radio.3-6GHz                   |  Radio between 3 and 6 GHz
S | em.radio.6-12GHz                  |  Radio between 6 and 12 GHz
S | em.radio.12-30GHz                 |  Radio between 12 and 30 GHz
Q | em.wavenumber                     |  Wavenumber value in the em frame
Q | em.wl                             |  Wavelength value in the em frame
Q | em.wl.central                     |  Central wavelength
Q | em.wl.effective                   |  Effective wavelength
Q | instr                             |  Instrument
E | instr.background                  |  Instrumental background
Q | instr.bandpass                    |  Bandpass (e.g.: band name) of instrument
Q | instr.bandwidth                   |  Bandwidth of the instrument
Q | instr.baseline                    |  Baseline for interferometry
S | instr.beam                        |  Beam
Q | instr.calib                       |  Calibration parameter
S | instr.det                         |  Detector
Q | instr.det.noise                   |  Instrument noise
Q | instr.det.psf                     |  Point Spread Function
Q | instr.det.qe                      |  Quantum efficiency
Q | instr.dispersion                  |  Dispersion of a spectrograph
Q | instr.experiment                  |  Experiment or group of instruments
S | instr.filter                      |  Filter
S | instr.fov                         |  Related to the field of view
S | instr.obsty                       |  Observatory, satellite, mission
Q | instr.obsty.seeing                |  Seeing
Q | instr.offset                      |  Offset angle with respect to main direction of observation
Q | instr.order                       |  Spectral order in a spectrograph
Q | instr.param                       |  Various instrumental parameters
S | instr.pixel                       |  Pixel (default size: angular)
S | instr.plate                       |  Photographic plate
Q | instr.plate.emulsion              |  Plate emulsion
Q | instr.precision                   |  Instrument precision
Q | instr.rmsf                        |  Rotation Measure Spread Function
Q | instr.saturation                  |  Instrument saturation threshold
Q | instr.scale                       |  Instrument scale (for CCD, plate, image)
Q | instr.sensitivity                 |  Instrument sensitivity, detection threshold
Q | instr.setup                       |  Instrument configuration or setup
Q | instr.skyLevel                    |  Sky level
Q | instr.skyTemp                     |  Sky temperature
Q | instr.tel                         |  Telescope
Q | instr.tel.focalLength             |  Telescope focal length
S | instr.voxel                       |  Related to a voxel (n-D volume element with n>2)
P | meta                              |  Metadata
P | meta.abstract                     |  Abstract (of paper, proposal, etc.)
P | meta.bib                          |  Bibliographic reference
P | meta.bib.author                   |  Author name
P | meta.bib.bibcode                  |  Bibcode
P | meta.bib.fig                      |  Figure in a paper
P | meta.bib.journal                  |  Journal name
P | meta.bib.page                     |  Page number
P | meta.bib.volume                   |  Volume number
Q | meta.calibLevel                   |  Processing/calibration level
Q | meta.checksum                     |  Numerical signature of digital data
P | meta.code                         |  Code or flag
P | meta.code.class                   |  Classification code
P | meta.code.error                   |  Limit uncertainty error flag
P | meta.code.member                  |  Membership code
P | meta.code.mime                    |  MIME type
P | meta.code.multip                  |  Multiplicity or binarity flag
P | meta.code.qual                    |  Quality, precision, reliability flag or code
P | meta.code.status                  |  Status code (e.g.: status of a proposal/observation)
P | meta.cryptic                      |  Unknown or impossible to understand quantity
Q | meta.curation                     |  Parameter informing about the curation of the data
Q | meta.dataset                      |  Dataset
Q | meta.email                        |  Contact e-mail
S | meta.file                         |  File
S | meta.fits                         |  FITS standard
P | meta.id                           |  Identifier, name or designation
P | meta.id.assoc                     |  Identifier of associated counterpart
P | meta.id.CoI                       |  Name of Co-Investigator
P | meta.id.cross                     |  Cross identification
P | meta.id.parent                    |  Identification of parent source
P | meta.id.part                      |  Part of identifier, suffix or sub-component
P | meta.id.PI                        |  Name of Principal Investigator or Co-PI
S | meta.main                         |  Main value of something
S | meta.modelled                     |  Quantity was produced by a model
P | meta.note                         |  Note or remark (longer than a code or flag)
P | meta.number                       |  Number (of things; e.g. nb of object in an image)
S | meta.preview                      |  Related to a preview operation for a dataset
Q | meta.query                        |  A query posed to an information system or database or a property of it
P | meta.record                       |  Record number
P | meta.ref                          |  Reference or origin
P | meta.ref.doi                      |  DOI identifier (dereferenceable)
P | meta.ref.epic                     |  ePIC identifier (dereferenceable)
Q | meta.ref.ivoid                    |  Identifier as recommended  in the IVOA  (dereferenceable)
P | meta.ref.orcid                    |  ORCID identifier for people working in research (dereferenceable)
P | meta.ref.pid                      |  Generic Persistent Identifier (dereferenceable)
P | meta.ref.rorid                    |  ROR unique and persistent identifier for research organizations
P | meta.ref.uri                      |  URI, universal resource identifier
P | meta.ref.url                      |  URL, web address
S | meta.software                     |  Software used in generating data
S | meta.table                        |  Table or catalogue
P | meta.title                        |  Title or explanation
Q | meta.ucd                          |  UCD
P | meta.unit                         |  Unit
P | meta.version                      |  Version
S | obs                               |  Observation
Q | obs.airMass                       |  Airmass
S | obs.atmos                         |  Atmosphere, atmospheric phenomena affecting an observation
Q | obs.atmos.extinction              |  Atmospheric extinction
Q | obs.atmos.refractAngle            |  Atmospheric refraction angle
S | obs.calib                         |  Calibration observation
S | obs.calib.flat                    |  Related to flat-field calibration observation (dome, sky, ..)
S | obs.calib.dark                    |  Related to dark current calibration
S | obs.exposure                      |  Exposure
S | obs.field                         |  Region covered by the observation
S | obs.image                         |  Image
Q | obs.observer                      |  Observer, discoverer
S | obs.occult                        |  Observation of occultation phenomenon by solar system objects
S | obs.transit                       |  Observation of transit phenomenon  : exo-planets
Q | obs.param                         |  Various observation or reduction parameter
S | obs.proposal                      |  Observation proposal
Q | obs.proposal.cycle                |  Proposal cycle
S | obs.sequence                      |  Sequence of observations, exposures or events
E | phot                              |  Photometry
E | phot.antennaTemp                  |  Antenna temperature
Q | phot.calib                        |  Photometric calibration
C | phot.color                        |  Color index or magnitude difference
Q | phot.color.excess                 |  Color excess
Q | phot.color.reddFree               |  Dereddened color
E | phot.count                        |  Flux expressed in counts
E | phot.fluence                      |  Radiant photon energy received by a surface per unit area or irradiance of a surface integrated over time of irradiation
E | phot.flux                         |  Photon flux or irradiance
Q | phot.flux.bol                     |  Bolometric flux
E | phot.flux.density                 |  Flux density (per wl/freq/energy interval)
E | phot.flux.density.sb              |  Flux density surface brightness
E | phot.flux.sb                      |  Flux surface brightness
E | phot.limbDark                     |  Limb-darkening coefficients
E | phot.mag                          |  Photometric magnitude
E | phot.mag.bc                       |  Bolometric correction
Q | phot.mag.bol                      |  Bolometric magnitude
Q | phot.mag.distMod                  |  Distance modulus
E | phot.mag.reddFree                 |  Dereddened magnitude
E | phot.mag.sb                       |  Surface brightness in magnitude units
E | phot.radiance                     |  Radiance as energy flux per solid angle
Q | phys                              |  Physical quantities
Q | phys.SFR                          |  Star formation rate
E | phys.absorption                   |  Extinction or absorption along the line of sight
Q | phys.absorption.coeff             |  Absorption coefficient (e.g. in a spectral line)
Q | phys.absorption.gal               |  Galactic extinction
Q | phys.absorption.opticalDepth      |  Optical depth
Q | phys.abund                        |  Abundance
Q | phys.abund.Fe                     |  Fe/H abundance
Q | phys.abund.X                      |  Hydrogen abundance
Q | phys.abund.Y                      |  Helium abundance
Q | phys.abund.Z                      |  Metallicity abundance
Q | phys.acceleration                 |  Acceleration
S | phys.aerosol                      |  Relative to aerosol
Q | phys.albedo                       |  Albedo or reflectance
Q | phys.angArea                      |  Angular area
Q | phys.angMomentum                  |  Angular momentum
E | phys.angSize                      |  Angular size width diameter dimension extension major minor axis extraction radius
E | phys.angSize.smajAxis             |  Angular size extent or extension of semi-major axis
E | phys.angSize.sminAxis             |  Angular size extent or extension of semi-minor axis
Q | phys.area                         |  Area (in surface, not angular units)
S | phys.atmol                        |  Atomic and molecular physics (shared properties)
Q | phys.atmol.branchingRatio         |  Branching ratio
S | phys.atmol.collisional            |  Related to collisions
Q | phys.atmol.collStrength           |  Collisional strength
Q | phys.atmol.configuration          |  Configuration
Q | phys.atmol.crossSection           |  Atomic / molecular cross-section
Q | phys.atmol.element                |  Element
Q | phys.atmol.excitation             |  Atomic molecular excitation parameter
Q | phys.atmol.final                  |  Quantity refers to atomic/molecular final/ground state, level, etc.
Q | phys.atmol.initial                |  Quantity refers to atomic/molecular initial state, level, etc.
Q | phys.atmol.ionStage               |  Ion, ionization stage
S | phys.atmol.ionization             |  Related to ionization
Q | phys.atmol.lande                  |  Lande factor
S | phys.atmol.level                  |  Atomic level
Q | phys.atmol.lifetime               |  Lifetime of a level
Q | phys.atmol.lineShift              |  Line shifting coefficient
Q | phys.atmol.number                 |  Atomic number Z
Q | phys.atmol.oscStrength            |  Oscillator strength
Q | phys.atmol.parity                 |  Parity
Q | phys.atmol.qn                     |  Quantum number
Q | phys.atmol.radiationType          |  Type of radiation characterizing atomic lines (electric dipole/quadrupole, magnetic dipole)
Q | phys.atmol.symmetry               |  Type of nuclear spin symmetry
Q | phys.atmol.sWeight                |  Statistical weight
Q | phys.atmol.sWeight.nuclear        |  Statistical weight for nuclear spin states
Q | phys.atmol.term                   |  Atomic term
S | phys.atmol.transition             |  Transition between states
Q | phys.atmol.transProb              |  Transition probability, Einstein A coefficient
Q | phys.atmol.wOscStrength           |  Weighted oscillator strength
Q | phys.atmol.weight                 |  Atomic weight
Q | phys.columnDensity                |  Column density
S | phys.composition                  |  Quantities related to composition of objects
Q | phys.composition.massLightRatio   |  Mass to light ratio
Q | phys.composition.yield            |  Mass yield
S | phys.cosmology                    |  Related to cosmology
Q | phys.current                      |  Electric current
Q | phys.current.density              |  Electric current density
Q | phys.damping                      |  Generic damping quantities
Q | phys.density                      |  Density (of mass, electron, ...)
Q | phys.density.phaseSpace           |  Density in the phase space
Q | phys.dielectric                   |  Complex dielectric function
Q | phys.dispMeasure                  |  Dispersion measure
S | phys.dust                         |  Relative to dust
Q | phys.electCharge                  |  Electric charge
V | phys.electField                   |  Electric field
S | phys.electron                     |  Electron
Q | phys.electron.degen               |  Electron degeneracy parameter
Q | phys.emissMeasure                 |  Emission measure
Q | phys.emissivity                   |  Emissivity
Q | phys.energy                       |  Energy
Q | phys.energy.Gibbs                 |  Gibbs (free) energy or free enthalpy   [ G=H-TS ]
Q | phys.energy.Helmholtz             |  Helmholtz free energy [ A=U-TS ]
Q | phys.energy.density               |  Energy density
Q | phys.enthalpy                     |  Enthalpy  [ H=U+pv ]
Q | phys.entropy                      |  Entropy
Q | phys.eos                          |  Equation of state
Q | phys.excitParam                   |  Excitation parameter U
E | phys.fluence                      |  Particle energy received  by a surface per unit area and integrated over time
Q | phys.flux                         |  Flux or flow of particle, energy, etc.
Q | phys.flux.energy                  |  Energy flux, heat flux
Q | phys.gauntFactor                  |  Gaunt factor/correction
Q | phys.gravity                      |  Gravity
Q | phys.ionizParam                   |  Ionization parameter
Q | phys.ionizParam.coll              |  Collisional ionization
Q | phys.ionizParam.rad               |  Radiative ionization
E | phys.luminosity                   |  Luminosity
Q | phys.luminosity.fun               |  Luminosity function
E | phys.magAbs                       |  Absolute magnitude
Q | phys.magAbs.bol                   |  Bolometric absolute magnitude
V | phys.magField                     |  Magnetic field
Q | phys.mass                         |  Mass
Q | phys.mass.inertiaMomentum         |  Momentum of inertia or rotational inertia
Q | phys.mass.loss                    |  Mass loss
Q | phys.mol                          |  Molecular data
Q | phys.mol.dipole                   |  Molecular dipole
Q | phys.mol.dipole.electric          |  Molecular electric dipole moment
Q | phys.mol.dipole.magnetic          |  Molecular magnetic dipole moment
Q | phys.mol.dissociation             |  Molecular dissociation
Q | phys.mol.formationHeat            |  Formation heat for molecules
Q | phys.mol.quadrupole               |  Molecular quadrupole
Q | phys.mol.quadrupole.electric      |  Molecular electric quadrupole moment
S | phys.mol.rotation                 |  Molecular rotation
S | phys.mol.vibration                |  Molecular vibration
S | phys.particle                     |  Related to physical particles
S | phys.particle.neutrino            |  Related to neutrino
S | phys.particle.neutron             |  Related to neutron
S | phys.particle.proton              |  Related to proton
S | phys.particle.alpha               |  Related to alpha particle
S | phys.phaseSpace                   |  Related to phase space
E | phys.polarization                 |  Polarization degree (or percentage)
Q | phys.polarization.circular        |  Circular polarization
Q | phys.polarization.coherency       |  Matrix of the correlation between components of an electromagnetic wave
Q | phys.polarization.linear          |  Linear polarization
Q | phys.polarization.rotMeasure      |  Rotation measure polarization
Q | phys.polarization.stokes          |  Stokes polarization
Q | phys.polarization.stokes.I        |  Stokes polarization coefficient I
Q | phys.polarization.stokes.Q        |  Stokes polarization coefficient Q
Q | phys.polarization.stokes.U        |  Stokes polarization coefficient U
Q | phys.polarization.stokes.V        |  Stokes polarization coefficient V
Q | phys.potential                    |  Potential (electric, gravitational, etc.)
Q | phys.pressure                     |  Pressure
Q | phys.recombination.coeff          |  Recombination coefficient
Q | phys.reflectance                  |  Radiance factor (received radiance divided by input radiance)
Q | phys.reflectance.bidirectional    |  Bidirectional reflectance
Q | phys.reflectance.bidirectional.df |  Bidirectional reflectance distribution function
Q | phys.reflectance.factor           |  Reflectance normalized per direction cosine of incidence angle
Q | phys.refractIndex                 |  Refraction index
Q | phys.size                         |  Linear size, length (not angular) in length units or bytes
Q | phys.size.axisRatio               |  Axis ratio (a/b) or (b/a)
Q | phys.size.diameter                |  Diameter
Q | phys.size.radius                  |  Radius
Q | phys.size.smajAxis                |  Linear semi major axis
Q | phys.size.sminAxis                |  Linear semi minor axis
Q | phys.size.smedAxis                |  Linear semi median axis for 3D ellipsoids
Q | phys.temperature                  |  Temperature
Q | phys.temperature.effective        |  Effective temperature
Q | phys.temperature.electron         |  Electron temperature
Q | phys.transmission                 |  Transmission (of filter, instrument, ...)
V | phys.veloc                        |  Space velocity
Q | phys.veloc.ang                    |  Angular velocity
Q | phys.veloc.dispersion             |  Velocity dispersion
Q | phys.veloc.escape                 |  Escape velocity
Q | phys.veloc.expansion              |  Expansion velocity
Q | phys.veloc.microTurb              |  Microturbulence velocity
Q | phys.veloc.orbital                |  Orbital velocity
Q | phys.veloc.pulsat                 |  Pulsational velocity
Q | phys.veloc.rotat                  |  Rotational velocity
Q | phys.veloc.transverse             |  Transverse / tangential velocity
S | phys.virial                       |  Related to virial quantities (mass, radius, ...)
Q | phys.volume                       |  Volume (in cubic units)
Q | pos                               |  Position and coordinates
Q | pos.angDistance                   |  Angular distance, elongation
Q | pos.angResolution                 |  Angular resolution
Q | pos.az                            |  Position in alt-azimuthal frame
Q | pos.az.alt                        |  Alt-azimuthal altitude
Q | pos.az.azi                        |  Alt-azimuthal azimuth
Q | pos.az.zd                         |  Alt-azimuthal zenith distance
Q | pos.azimuth                       |  Azimuthal angle in a generic reference plane
S | pos.barycenter                    |  Barycenter
S | pos.bodycentric                   |  Body-centric related coordinate
S | pos.bodygraphic                   |  Body-graphic related coordinate
S | pos.bodyrc                        |  Body related coordinates
Q | pos.bodyrc.alt                    |  Body related coordinate (altitude on the body)
Q | pos.bodyrc.lat                    |  Body related coordinate (latitude on the body)
Q | pos.bodyrc.lon                    |  Body related coordinate (longitude on the body)
S | pos.cartesian                     |  Cartesian (rectangular) coordinates
Q | pos.cartesian.x                   |  Cartesian coordinate along the x-axis
Q | pos.cartesian.y                   |  Cartesian coordinate along the y-axis
Q | pos.cartesian.z                   |  Cartesian coordinate along the z-axis
S | pos.centroid                      |  Related to centroid position
S | pos.cmb                           |  Cosmic Microwave Background reference frame
S | pos.cylindrical                   |  Related to cylindrical coordinates
Q | pos.cylindrical.azi               |  Azimuthal angle around z-axis (cylindrical coordinates)
Q | pos.cylindrical.r                 |  Radial distance from z-axis (cylindrical coordinates)
Q | pos.cylindrical.z                 |  Height or altitude from reference plane (cylindrical coordinates)
Q | pos.dirCos                        |  Direction cosine
V | pos.distance                      |  Linear distance
S | pos.earth                         |  Coordinates related to Earth
Q | pos.earth.altitude                |  Altitude, height on Earth  above sea level
Q | pos.earth.lat                     |  Latitude on Earth
Q | pos.earth.lon                     |  Longitude on Earth
S | pos.ecliptic                      |  Ecliptic coordinates
Q | pos.ecliptic.lat                  |  Ecliptic latitude
Q | pos.ecliptic.lon                  |  Ecliptic longitude
Q | pos.emergenceAng                  |  Emergence angle of optical ray on an interface
S | pos.eop                           |  Earth orientation parameters
Q | pos.ephem                         |  Ephemeris
Q | pos.eq                            |  Equatorial coordinates
Q | pos.eq.dec                        |  Declination in equatorial coordinates
Q | pos.eq.ha                         |  Hour-angle
Q | pos.eq.ra                         |  Right ascension in equatorial coordinates
Q | pos.eq.spd                        |  South polar distance in equatorial coordinates
S | pos.errorEllipse                  |  Positional error ellipse
Q | pos.frame                         |  Reference frame used for positions
S | pos.galactic                      |  Galactic coordinates
Q | pos.galactic.lat                  |  Latitude in galactic coordinates
Q | pos.galactic.lon                  |  Longitude in galactic coordinates
S | pos.galactocentric                |  Galactocentric coordinate system
S | pos.geocentric                    |  Geocentric coordinate system
Q | pos.healpix                       |  Hierarchical Equal Area IsoLatitude Pixelization
S | pos.heliocentric                  |  Heliocentric position coordinate (solar system bodies)
Q | pos.HTM                           |  Hierarchical Triangular Mesh
Q | pos.incidenceAng                  |  Incidence angle of optical ray on an interface
S | pos.lambert                       |  Lambert projection
S | pos.lg                            |  Local Group reference frame
S | pos.lsr                           |  Local Standard of Rest reference frame
Q | pos.lunar                         |  Lunar coordinates
Q | pos.lunar.occult                  |  Occultation by lunar limb
Q | pos.nutation                      |  Nutation (of a body)
Q | pos.outline                       |  Set of points outlining a region (contour)
Q | pos.parallax                      |  Parallax
Q | pos.parallax.dyn                  |  Dynamical parallax
Q | pos.parallax.phot                 |  Photometric parallaxes
Q | pos.parallax.spect                |  Spectroscopic parallax
Q | pos.parallax.trig                 |  Trigonometric parallax
Q | pos.phaseAng                      |  Phase angle, e.g. elongation of earth from sun as seen from a third celestial object
V | pos.pm                            |  Proper motion
Q | pos.posAng                        |  Position angle of a given vector
V | pos.precess                       |  Precession (in equatorial coordinates)
Q | pos.resolution                    |  Spatial linear resolution (not angular)
S | pos.spherical                     |  Related to spherical coordinates
Q | pos.spherical.azi                 |  Azimuthal angle (spherical coordinates)
Q | pos.spherical.colat               |  Polar or Colatitude angle (spherical coordinates)
Q | pos.spherical.r                   |  Radial distance or radius (spherical coordinates)
S | pos.supergalactic                 |  Supergalactic coordinates
Q | pos.supergalactic.lat             |  Latitude in supergalactic coordinates
Q | pos.supergalactic.lon             |  Longitude in supergalactic coordinates
P | pos.wcs                           |  WCS keywords
P | pos.wcs.cdmatrix                  |  WCS CDMATRIX
P | pos.wcs.crpix                     |  WCS CRPIX
P | pos.wcs.crval                     |  WCS CRVAL
P | pos.wcs.ctype                     |  WCS CTYPE
P | pos.wcs.naxes                     |  WCS NAXES
P | pos.wcs.naxis                     |  WCS NAXIS
P | pos.wcs.scale                     |  WCS scale or scale of an image
Q | spect                             |  Spectroscopy
Q | spect.binSize                     |  Spectral bin size
S | spect.continuum                   |  Continuum spectrum
Q | spect.dopplerParam                |  Doppler parameter b
E | spect.dopplerVeloc                |  Radial velocity, derived from the shift of some spectral feature
E | spect.dopplerVeloc.opt            |  Radial velocity derived from a wavelength shift using the optical convention
E | spect.dopplerVeloc.radio          |  Radial velocity derived from a frequency shift using the radio convention
E | spect.index                       |  Spectral index
S | spect.line                        |  Spectral line
E | spect.line.asymmetry              |  Line asymmetry
E | spect.line.broad                  |  Spectral line broadening
Q | spect.line.broad.Stark            |  Stark line broadening coefficient
E | spect.line.broad.Zeeman           |  Zeeman broadening
E | spect.line.eqWidth                |  Line equivalent width
E | spect.line.intensity              |  Line intensity
E | spect.line.profile                |  Line profile
Q | spect.line.strength               |  Spectral line strength S
E | spect.line.width                  |  Spectral line full width half maximum
Q | spect.resolution                  |  Spectral (or velocity) resolution
S | src                               |  Observed source viewed on the sky
S | src.calib                         |  Calibration source
S | src.calib.guideStar               |  Guide star
Q | src.class                         |  Source classification (star, galaxy, cluster, comet, asteroid )
Q | src.class.color                   |  Color classification
Q | src.class.distance                |  Distance class e.g. Abell
Q | src.class.luminosity              |  Luminosity class
Q | src.class.richness                |  Richness class e.g. Abell
Q | src.class.starGalaxy              |  Star/galaxy discriminator, stellarity index
Q | src.class.struct                  |  Structure classification e.g. Bautz-Morgan
Q | src.density                       |  Density of sources
Q | src.ellipticity                   |  Source ellipticity
Q | src.impactParam                   |  Impact parameter
Q | src.morph                         |  Morphology structure
Q | src.morph.param                   |  Morphological parameter
Q | src.morph.scLength                |  Scale length for a galactic component (disc or bulge)
Q | src.morph.type                    |  Hubble morphological type (galaxies)
S | src.net                           |  Qualifier indicating that a quantity (e.g. flux) is background subtracted rather than total
Q | src.orbital                       |  Orbital parameters
Q | src.orbital.eccentricity          |  Orbit eccentricity
Q | src.orbital.inclination           |  Orbit inclination
Q | src.orbital.meanAnomaly           |  Orbit mean anomaly
Q | src.orbital.meanMotion            |  Mean motion
Q | src.orbital.node                  |  Ascending node
Q | src.orbital.periastron            |  Periastron
Q | src.orbital.Tisserand             |  Tisserand parameter (generic)
Q | src.orbital.TissJ                 |  Tisserand parameter with respect to Jupiter
Q | src.redshift                      |  Redshift
Q | src.redshift.phot                 |  Photometric redshift
Q | src.sample                        |  Sample
Q | src.spType                        |  Spectral type MK
Q | src.var                           |  Variability of source
E | src.var.amplitude                 |  Amplitude of variation
Q | src.var.index                     |  Variability index
Q | src.var.pulse                     |  Pulse
Q | stat                              |  Statistical parameters
Q | stat.asymmetry                    |  Measure of asymmetry
P | stat.correlation                  |  Correlation between two parameters
P | stat.covariance                   |  Covariance between two parameters
P | stat.error                        |  Statistical error
P | stat.error.sys                    |  Systematic error
Q | stat.filling                      |  Filling factor (volume, time, ...)
Q | stat.fit                          |  Fit
P | stat.fit.chi2                     |  Chi2
P | stat.fit.dof                      |  Degrees of freedom
P | stat.fit.goodness                 |  Goodness or significance of fit
S | stat.fit.omc                      |  Observed minus computed
Q | stat.fit.param                    |  Parameter of fit
P | stat.fit.residual                 |  Residual fit
Q | stat.Fourier                      |  Fourier coefficient
Q | stat.Fourier.amplitude            |  Amplitude of Fourier coefficient
S | stat.fwhm                         |  Full width at half maximum
S | stat.interval                     |  Generic interval between two limits (defined as a pair of values)
P | stat.kurtosis                     |  Kurtosis of a probability distribution (Fourth moment)
P | stat.likelihood                   |  Likelihood
P | stat.mad                          |  Median absolute deviation from median value in a univariate data sample
S | stat.max                          |  Maximum or upper limit
S | stat.mean                         |  Mean, average value
S | stat.median                       |  Median value
S | stat.min                          |  Minimum or lowest limit
Q | stat.param                        |  Parameter
Q | stat.percentile                   |  Percentile of a statistical distribution
Q | stat.probability                  |  Probability
P | stat.rank                         |  Rank or order in list of sorted values
P | stat.rms                          |  Root mean square as square root of sum of squared values or quadratic mean
P | stat.skewness                     |  Skewness of a probability distribution (third moment)
P | stat.snr                          |  Signal to noise ratio
P | stat.stdev                        |  Standard deviation as the square root of the variance
S | stat.uncalib                      |  Qualifier of a generic uncalibrated quantity
Q | stat.value                        |  Miscellaneous value
P | stat.variance                     |  Variance
P | stat.weight                       |  Statistical weight
Q | time                              |  Time, generic quantity in units of time or date
Q | time.age                          |  Age
Q | time.creation                     |  Creation time/date (of dataset, file, catalogue,...)
Q | time.crossing                     |  Crossing time
Q | time.duration                     |  Interval of time describing the duration of a generic event or phenomenon
Q | time.end                          |  End time/date of a generic event
Q | time.epoch                        |  Instant of time related to a generic event (epoch, date, Julian date, time stamp/tag,...)
Q | time.equinox                      |  Equinox
Q | time.interval                     |  Time interval, time-bin, time elapsed between two events, not the duration of an event
Q | time.lifetime                     |  Lifetime
Q | time.period                       |  Period, interval of time between the recurrence of phases in a periodic phenomenon
Q | time.period.revolution            |  Period of revolution of a body around a primary one (similar to year)
Q | time.period.rotation              |  Period of rotation of a body around its axis (similar to day)
Q | time.phase                        |  Phase, position within a period
Q | time.processing                   |  A time/date associated with the processing of data
Q | time.publiYear                    |  Publication year
Q | time.relax                        |  Relaxation time
Q | time.release                      |  The time/date data is available to the public
Q | time.resolution                   |  Time resolution
Q | time.scale                        |  Timescale
Q | time.start                        |  Start time/date of generic event
# This file distributed under CC-0 by the IVOA
