A CoordFrame has to have at least a name CoordFrame substitution group head element Coordinate equinox: B{year} or J{year} with at least one decimal; do not use in conjunction with ICRS Abstract space reference frame type ICRS type: no equinox FK[45] type: needs an equinox A custom space reference frame type defined through pole and X-axis directions Define coordinate reference frame from scratch; pole and X-axis need to be defined in a known coordinate system Head element for the Coordinate reference frame substitution group: optional equinox with either a standard reference system (ICRS, FK5, FK4) and optional standard pole (equatorial, ecliptic, galactic, etc.), or a custom frame with pole (positive Z-axis) and positive X-axis direction The ICRS reference frame FK4; needs a Besselian epoch FK5; needs a Julian epoch Ecliptic coordinates; needs an epoch Galactic coordinates; first system Galactic coordinates; second system SuperGalactic coordinates Local Azimuth and Elevation coordinates Generic Body coordinates The Geographic reference frame The Geodetic reference frame The Geomagnetic reference frame The Geocentric Solar Ecliptic reference frame The Geocentric Solar Magnetic reference frame The Solar Magnetic reference frame The Heliographic reference frame The Heliocentric Earth Ecliptic reference frame The Heliocentric Earth Equatorial reference frame The Heliocentric Inertial reference frame The Heliocentric of Date reference frame The planetocentric reference frame anchored on Mercury The planetocentric reference frame anchored on Venus The lunacentric reference frame anchored on the moon The planetocentric reference frame anchored on Mars The planetocentric reference frame anchored on Jupiter The planetocentric reference frame anchored on Saturn The planetocentric reference frame anchored on Uranus The planetocentric reference frame anchored on Neptune The planetocentric reference frame anchored on Pluto The planetographic reference frame anchored on Mercury The planetographic reference frame anchored on Venus The lunagraphic reference frame anchored on the moon The planetographic reference frame anchored on Mars The planetographic reference frame anchored on Jupiter The planetographic reference frame anchored on Saturn The planetographic reference frame anchored on Uranus The planetographic reference frame anchored on Neptune The planetographic reference frame anchored on Pluto Unknown space reference frame; the client is responsible for assigning a default Coordinate reference frame: a custom pole (positive Z-axis) and positive X-axis direction If solar system positions are implied anywhere, the planetary ephemeris to be used needs to be provided - usually JPL-DE405 with ICRS and JPL-DE200 with FK5 Abstract type for reference positions Type for standard reference positions Type for custom positions: specifies reference origin Head element from the ReferencePosition substitution group: either a "known place" such as geocenter or barycenter (RefPos), or a position defined in a known coordinate system (CoordOrigin) Location of the observer/telescope Barycenter of the solar system Center of the sun Center of the earth Local Standard of Rest (only used for Doppler velocities) Center of the Galaxy Center of the Local Super Cluster Center of the Moon Barycenter of the Earth-Moon system Center of Mercury Center of Venus Center of Mars Center of Jupiter Center of Saturn Center of Uranus Center of Neptune Center of Pluto A relocatable origin, especially useful for simulations Unknown origin; the client is responsible for assigning a default Origin of the coordinate system, given as a position in another, known, coordinate system Provides the coordinate definitions: number of axes, SPHERICAL, CARTESIAN, or UNITSPHERE, presence of velocities Abstract head element for the CoordFlavor substitution group Spherical (2-D) coordinates Cartesian 1-, 2-, or 3-D coordinates 3-D Unit sphere coordinates (direction cosines) 3-D geographic-like spherical coordinates (longitude, latitude, altitude) A spatial coordinate frame consists of a coordinate frame and a reference position Coordinate reference frame: optional equinox with either a standard reference system (ICRS, FK5, FK4) and optional standard pole (equatorial, ecliptic, galactic, etc.), or pole (positive Z-axis) and positive X-axis direction Origin of the coordinate reference frame: either a "known place" such as geocenter or barycenter, or a position defined in a known coordinate system Provides the coordinate definitions: number of axes, SPHERICAL or CARTESIAN, presence of velocities, and the Doppler definitions (if needed) The time reference frame consists of a timescale, a reference position, and optionally a reference direction (needed when transformations have been applied) The time reference frame consists of a time scale, a time format, and a reference time, if needed Origin of the coordinate reference frame: either a "known place" such as geocenter or barycenter, or a position defined in a known coordinate system Some time transformations (e.g., change of RefPos) depend on an assumed directonal position of the source Contains the spectral frame reference position The reference frame for the Doppler velocities; note presence of LSR The Doppler definition used: optical, radio, or pseudo-relativistic (i.e., how is a redshift converted to a velocity); the most common is optical, except when the reference is LSR (usually radio) Contains the Doppler definitions, including whether the values are velocity or redshift (value_type) The Doppler definition used: optical, radio, or pseudo-relativistic (i.e., how is a redshift converted to a velocity); the most common is optical, except when the reference is LSR (usually radio) The reference frame for the Doppler velocities; note presence of LSR A CoordSys consists of at least one coordinate frames Head element (not abstract) of the CoordSys group The time coordinate reference frame The spatial coordinate reference frame The reference frame for the spectral coordinate; note presence of LSR Contains the Doppler definitions, including whether the values are velocity or redshift (value_type) Element for pixel Coordinate Frames Element for generic Coordinate Frames The astroniomical coordinate system definition: spatial coordinate frame and reference position; time frame and reference position; the coordinate flavor; spectral frame and (optionally) Doppler frame; and the planetary ephemeris; an ID is required, since this is how coordinate elements are associated with their coordinate systems The coordinate system definition: spatial coordinate frame and reference position; time frame and reference position; the coordinate flavor; and the planetary ephemeris; an ID is required, since this is how coordinate elements are associated with their coordinate systems The pixel coordinate system definition Pixel form of CoordSys Abstact coordinate interval type The time interval needs to contain a start time or a stop time or both; it needs to refer to a coordinate system; boundaries may or may not be inclusive astronTime may be expressed in ISO8601 or as a double relative to a reference time astronTime may be expressed in ISO8601 or as a double relative to a reference time Scalar coordinate interval type Lower bound of interval Upper bound of interval 2-D coordinate interval type 3-D coordinate interval type The spatial coordinate interval substitution group head element; such an element needs to contain a minimum or maximum scalar or vector value, or both; it needs to refer to a coordinate system; boundaries may or may not be inclusive; and it can have a fill factor An interval in a scalar coordinate An interval ("box") in a 2-D coordinate pair An interval ("cube") in a 3-D coordinate triplet Parent type for spatial intervals Defines a sphere Defines a velocity sphere A special kind of area is a circle or sphere (in two or three dimensions), defined by a center position and a radius; the radius requires a unit Contains a spatial position CoordInterval Contains a spatial velocity CoordInterval A special kind of area is a circle or sphere (in two or three dimensions), defined by a center position and a radius; the radius requires a unit Points to a Region file Contains an abstract Region The spatial interval substitution group head element; a spatial coordinate interval (volume) is specified as a circle (cone) or sphere; a 1-D, 2-D, or 3-D interval; a Region; or a RegionFile Defines a sphere (3-D) region for spatial coordinates; contains a center position and a radius Contains a CoordInterval element: a 1-D range, 2-D box, or 3-D cube A region as defined in a FITS region file Contains a region as defined in the Region schema Contains a Velocity CoordInterval element: a 1-D range, 2-D box, or 3-D cube; plus a time unit for velocity values Defines a sphere (3-D) region for velocity coordinates; contains a center position and a radius Contains a CoordInterval element: a 1-D range, 2-D box, or 3-D cube Contains a 1-D spectral interval Contains a 1-D redshift interval; position and time units are required if redshifts are expressed as Doppler velocities Generalized coordinate area type Astronomical area type Pixel area type General coordinate area description; head element but not abstract Astronomical coordinate volume Pixel space bounds Abstract stcMetadata type Generalized single stcMetadata type Type for STC Resource Profile The coordinate system definition: spatial coordinate frame and reference position; time frame and reference position; the coordinate flavor; and the planetary ephemeris; an ID is required, since this is how coordinate elements are associated with their coordinate systems CoordSpec contains information on time and spatial resolution, errors, and pixelsizes (if fixed); typical best numbers are expected The coverage area of the resource; the fill factor does not need to be 1.0 Type for STC search location Type for STC catalog entry description Type for observational STC metadata Describes the spatial and temporal volume covered by an observation Specifies the location of the observatory during the observation Describes the spatial and temporal coverage of the observation Defines the pixel coordinate system for pixelated data Type for an observatory location Type for describing the coordinate volume occupied by observational data, as seen from the observatory location Type to specify a pixel space Toplevel: Abstract STCmetadata contains a choice of: ResourceProfile, SearchLocation, CatalogEntryLocation, or ObservationLocation plus ObservatoryLocation elements Describes the spatial and temporal coverage of a resource Defines the spatial and temporal coordinate space specified by a query Describes the spatial and temporal coverage of a catalog (fragment) and contains the coordinates of the catalog entries; multiple coordinate systems are allowed Describes the coordinate system used in and coordinate space occupied by a particular observational dataset; it contains an observation location, an observatory location, and optionally a pixel coordinate system