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 Geocentric (co-rotating) reference frame
The Geodetic reference frame; semi-major axis and inverse flattening may be provided to define the reference spheroid; the default is the IAU 1976 reference spheroid
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
(Kinematic) Local Standard of Rest (only used for Doppler velocities); equivalent to LSRK
Kinematic Local Standard of Rest (only used for Doppler velocities); equivalent to LSR
Dynamic Local Standard of Rest (only used for Doppler velocities)
Center of the Galaxy
Center of the Local Group
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 (longitude, latitude) or 3-D (long, lat, radius/elevation) coordinates
Cartesian 1-, 2-, or 3-D coordinates
3-D Unit sphere coordinates (direction cosines); in (long,lat), X is in the direction (0,0), Y (pi/2,0), Z (0,pi/2)
2-D polar coordinates (radius, posangle)
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
Limit to be included?
Limit to be included?
Fraction of interval that is occupied by data
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