In addition to the generic FME feature attributes that FME Workbench adds to all features (see About Feature Type Attributes), this format also adds format-specific attributes (Format Attributes).
The following format attributes are returned for each raster table in the FITS.
|
Attribute Name |
Contents |
|---|---|
|
fits_type |
fits_raster, fits_none |
|
fits_date |
The date on which the HDU (header and data unit) was created, or potentially date and time. |
|
fits_origin |
The organization or institution responsible for creating the file. |
|
fits_author |
Identifies who compiled the information in the header data. |
|
fits_referenc |
Cites a reference where the data associated with the header is published. |
|
fits_object |
A name for the object being observed. |
|
fits_observer |
Identifies who acquired the data associated with the header. |
|
fits_telescop |
Identifies the telescope used to acquire the data associated with the header. |
|
fits_instrume |
Identifies the instrument used to acquire the data associated with the header. |
|
fits_ctype1 fits_ctype2 fits_ctype3 |
The type of intermediate Axis i of the image. The first four characters are the coordinate type, then a hyphen, and the final three characters specify an algorithm for computing the world coordinate value. |
|
fits_cunit1 fits_cunit2 fits_cunit3 |
The physical units of crvali and cdelti. |
|
fits_crval1 fits_crval2 fits_crval3 |
World-coordinate value at the reference point of Axis i. |
|
fits_cdelt1 fits_cdelt2 fits_cdelt3 |
Increment of the world coordinate at the reference point for Axis i. |
|
fits_crpix1 fits_crpix2 fits_crpix3 |
Location of the reference point in the image for Axis j. Note that this may lay outside the image, and that the first pixel is (1,1,...). |
|
fits_pc1_1 fits_pc2_1 fits_pc1_2 fits_pc2_2 |
Linear Transformation matrix between Pixel Axes j and intermediate-coordinate Axes i. Must be non-singular. |
|
fits_cd1_1 fits_cd2_1 fits_cd1_2 fits_cd2_2 |
Linear Transformation matrix (with scale) between Pixel Axes j and intermediate-coordinate Axes i. Must be non-singular. This equals pc when CDELTi is unity. Note that this is an exclusive alternative to PCi_j, and both cannot appear together. |
|
fits_epoch |
This keyword is deprecated and should not be used in new FITS files. It is reserved primarily to prevent its use with other meanings. The EQUINOX keyword shall be used instead. The value field of this keyword was previously defined to contain a floating-point number giving the equinox in years for the celestial-coordinate system in which positions are expressed. |
|
fits_obsgeo-x fits_obsgeo-y fits_obsgeo-z |
[X, Y, Z]-coordinate of the location with reference to a standard geocentric terrestrial reference frame where the observation took place. |
|
fits_cname1 fits_cname2 fits_cname3 |
Name of Coordinate Axis i. |
|
fits_crder1 fits_crder2 fits_crder3 |
Random error in Axis i. |
|
fits_csyer1 fits_csyer2 fits_csyer3 |
Systematic error in Axis i. |
|
fits_lonpole |
Longitude in the native coordinate system of the celestial system’s north pole. |
|
fits_latpole |
Latitude in the native coordinate system of the celestial system’s north pole. |
|
fits_equinox |
Epoch of the mean equator and equinox in years, whose value must be non-negative. The interpretation depends on the value of fits_radesys if present:
|
|
fits_radesys |
Name of the reference frame of equatorial or ecliptic coordinates. One of:
|
|
fits_restfrq |
Rest frequency of the spectral feature of interest in Hz. |
|
fits_restwav |
Vacuum rest wavelength of the spectral feature of interest. |
|
fits_specsys |
The reference frame for the spectral-axis coordinate(s). |
|
fits_ssysobs |
The spectral reference frame that is constant over the range of the non-spectral world coordinates. |
|
fits_ssyssrc |
Reference frame for the value of fits_zsource. |
|
fits_velosys |
Relative radial velocity between the observer and the selected standard of rest in the direction of the celestial reference coordinate. |
|
fits_zsource |
Radial velocity with respect to an alternative frame of rest, expressed as a unitless redshift. |
|
fits_velangl |
In the case of relativistic velocities, this keyword may be used to express the orientation of the space velocity vector w.r.t. the plane of the sky. |
|
fits_date-obs |
Date (or datetime) of the start of an observation. |
|
fits_mjd-obs |
Modified Julian Date of the observation, whose value corresponds to the start of the observation. |
|
fits_bepoch |
The value of the Besselian epoch (time scale of Barycentric Dynamical Time). |
|
fits_jepoch |
The value of the Julian epoch (time scale of Ephemeris Time). |
|
fits_date-avg |
Calendar date of the midpoint of the observation. |
|
fits_mjd-avg |
Modified Julian Date of the mid-point of the observation. |
|
fits_date-beg |
Datetime of the start of an observation in the time system of fits_timesys. |
|
fits_mjd-beg |
Modified Julian Date corresponding to fits_date-beg. |
|
fits_tstart |
The value of the start time of data acquisition in units of fits_timeunit relative to fits_mjdref, fits_jdref, or fits_dateref and fits_timeoffs, in the time system specified by fits_timesys. |
|
fits_date-end |
Datetime of the end of an observation in the time system of fits_timesys . |
|
fits_mjd-end |
Modified Julian Date corresponding to fits_date-end. |
|
fits_tstop |
The value of the end time of data acquisition in units of fits_timeunit relative to fits_mjdref, fits_jdref, or fits_dateref and fits_timeoffs, in the time system specified by fits_timesys. |
|
fits_xposure |
The effective exposure duration for the data, corrected for dead time and lost time in the units of fits_timeunit. |
|
fits_telapse |
The amount of time elapsed, in the units of fits_timeunit, between the start and the end of the observation. |
|
fits_timesys |
A string code for the time scale of the time-related keywords. Assumed UTC if missing. |
|
fits_mjdref |
The reference time in MJD. |
|
fits_jdref |
The reference time in JD. |
|
fits_dateref |
Datetime representing the reference time. |
|
fits_trefpos |
A string code for the spatial location at which the observation time is valid. |
|
fits_trefdir |
The name of the keyword containing the longitudinal coordinate, followed by a comma, followed by the name of the keyword containing the latitudinal coordinate. |
|
fits_plephem |
A string representing a recognized designation for the Solar System ephemeris. |
|
fits_timeunit |
A string specifying the time unit. If absent, assume s. |
|
fits_timeoffs |
The offset in time that shall be added to the reference time, one of:
|
|
fits_timsyer |
The absolute time error in units of fits_timesys. |
|
fits_timrder |
The relative time error in units of fits_timesys. |
|
fits_czphs1 fits_czphs2 fits_czphs3 |
The time at the zero point of phase Axis i. |
|
fits_cperi1 fits_cperi2 fits_cperi3 |
The period of phase Axis i, can only be used if it is constant. |