Advanced Scientific Data Format: Difference between revisions

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{{Infobox file format

Advanced Scientific Data Format is a proposed replacement to the [[FITS]] standard for astronomical images and other astronomical data. The [[Metadata]] is contained in a [[YAML]] header followed by binary or ascii data. The

| name = Advanced Scientific Data Format

| icon = ASDF tree logo.svg

| iconcaption =

| icon_size = 160px

| screenshot =

| screenshot_size =

| caption =

|_noextcode =

| extension = <!-- or: | extensions = -->

|_nomimecode =

| mime =

| type_code =

| uniform_type =

| conforms_to =

| magic = {{code|#ASDF}}

| developer =

| released = {{start date and age|2015|09|19}} <!-- date for tag v1.0.0 -->

| latest_release_version =

| latest_release_date = <!-- {{start date and age|YYYY|mm|dd|df=yes/no}} -->

| genre = scientific data

| container_for =

| contained_by = [[YAML]]

| extended_from = [[FITS]]

| extended_to =

| standard = <!-- or: | standards = -->

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| url = {{URL|asdf-standard.readthedocs.io}}

}}

'''Advanced Scientific Data Format''' ('''ASDF''') is a proposed replacement to the [[FITS]] standard for astronomical images and other [[scientific data]].<ref name=Greenfield2015>{{cite journal |last1=Greenfield |first1=P. |last2=Droettboom |first2=M. |last3=Bray |first3=E. |year=2015 |title=ASDF: A new data format for astronomy |journal=Astronomy and Computing |volume=12 |pages=240–251 |doi=10.1016/j.ascom.2015.06.004 |bibcode = 2015A&C....12..240G|doi-access=free }}</ref> The [[metadata]] is contained in a [[YAML]] (Human-readable data serialization format) header followed by binary or ASCII data.

ASDF is used, notably, as an interchange format for the data processing pipeline of the [[James Webb Space Telescope]].[https://jwst-docs.stsci.edu/understanding-jwst-data-files/jwst-data-formats#JWSTDataFormats-asdfASDFformat]

==See also==

* [[FITS]]

==Improvements to FITS==

* [[YAML]]

The Flexible Image Transport System (FITS) standard is a widely used data format in astronomy that incorporates metadata and ASCII or binary data in the same file.<ref>{{cite journal |last1=Wells |first1=D. C. |last2=Greisen |first2=E. W. |last3=Harten |first3=R. H. |title=FITS: A Flexible Image Transport System |journal=Astronomy and Astrophysics Supplement Series |volume=44 |pages=363–370 |date=June 1981 |bibcode=1981A&AS...44..363W}}</ref> However, the FITS standard has several limitations that make it difficult to use for complicated and hierarchical data. For example, the FITS 'cards' have keywords limited to only 8 characters, which can make it difficult to properly describe the value associated with it and the value for each keyword and its comment cannot be longer than 68 characters.<ref name=Greenfield2015 /> By using YAML, more sophisticated and nested data structures may be used in ASDF than FITS.

==References==

{{Reflist}}

==External links==

* [http://{{Official website|asdf-standard.readthedocs.org/en/latest/io}} http://asdf-standard.readthedocs.org/en/latest/]for documentation

* [http://www.sciencedirect.com/science/article/pii/S2213133715000645 http://www.sciencedirect.com/science/article/pii/S2213133715000645]

{{Portal bar|Physics|Astronomy|Stars|Outer space|Science}}

[[Category:Astronomical imaging]]

[[Category:Graphics file formats]]

[[Category:Data types]]