Package nom.tam.fits.header

package nom.tam.fits.header

Standardized FITS header keywords. In addition to the reserved keywords defined by the FITS standard, there are conventions and commonly adopted usage patterns. Many organisations have defined their own sets of keywords also. To help users conform to the standards and conventions, the library offers a collection the standard and commonly used FITS keywords.

Using these 'standardized' keywords can now make compiler checked references to keywords (No more pruney String references), and prevents improper usage by restricting the types of HDUs keywords may appear in, as well as what type of values they may be associated with. See Header.setKeywordChecking(nom.tam.fits.Header.KeywordCheck) and HeaderCard.setValueCheckingPolicy(nom.tam.fits.HeaderCard.ValueCheck) on controlling what checking is done on keyword usage and how violations are dealt with.

Some of these dictionaries contain keywords that have equivalent usage. These are listed in Synonyms.

Related Packages

Package	Description
nom.tam.fits	The core classes of nom-tam-fits.
nom.tam.fits.header.extra	Various commonly used conventions for FITS header keywords, listed by organization.
nom.tam.fits.header.hierarch	Support for the registered hierarchical keyword convention.
nom.tam.fits.utilities	A collection of useful classes.

Class	Description
Bitpix	Standard BITPIX values and associated functions.
Checksum	File checksum keywords.
Compression	The following keywords are defined by the compression convention for use in the header of the FITS binary table extension to describe the structure of the compressed image.
DataDescription	This data dictionary contains FITS keywords that have been widely used within the astronomical community.
DateTime	Date-time related keywords defined by the FITS standard.
FitsHeaderImpl	Deprecated. Use the more intuitively named FitsKey class instead.
FitsKey	A concrete implementation of standardized FITS header keywords.
GenericKey	Deprecated. This class duplicates functionality that is available in FitsKey, Standard, ans/or IFitsHeader.
HierarchicalGrouping	This data dictionary contains FITS keywords that have been widely used within the astronomical community.
IFitsHeader	Interface for standardized header keyword implementations.
IFitsHeader.HDU	An enumeration of HDU types in which a header keyword may be used.
IFitsHeader.SOURCE	Documentation sources for the various known conventions.
IFitsHeader.VALUE	Values types to which implementing keywords can be restricted to.
InstrumentDescription	This data dictionary contains FITS keywords that have been widely used within the astronomical community.
NonStandard	This data dictionary contains FITS keywords that have been widely used within the astronomical community.
ObservationDescription	This data dictionary contains FITS keywords that have been widely used within the astronomical community.
ObservationDurationDescription	This data dictionary contains FITS keywords that have been widely used within the astronomical community.
Standard	This data dictionary lists the 53 keywords currently defined in the FITS Standard.
Stokes	A mapping of image coordinate values for a coordinate axis with CTYPEna = 'STOKES' (or equivalent), specifying polarization (or cross-polarization) data products along the image direction.
Stokes.Parameters	Helper class for setting or interpreting a set of measured Stokes parameters stored along an array dimension.
Synonyms	This enum wil try to list synonyms inside or over different dictionaries.
WCS	Standard FITS keywords for defining world coordinate systems (WCS).