Advanced Scientific Data Format: Difference between revisions

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{{Infobox file format

'''Advanced Scientific Data Format''' is a proposed<ref>{{cite journal | bibcode = 2015A&C....12..240G | title=ASDF: A new data format for astronomy | journal=Astronomy and Computing | volume=12 | page=240 | year=2015 | authors=Greenfield, P.; Droettboom, M.; Bray, E.}}</ref> 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.

| 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 = -->

| free =

| 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]

==Improvements to FITS==

The Flexible Image Transport System [[(FITS]]) standard <ref>{{citeis journala |widely bibcodeused =data 1979ipia.coll..445Wformat |in title=FITSastronomy -that aincorporates Flexiblemetadata Imageand TransportASCII Systemor |binary page=445data |in year=1979the |same authorsfile.<ref>{{cite journal |last1=Wells, |first1=D. C.; |last2=Greisen, |first2=E. W.}}</ref> is|last3=Harten a|first3=R. widelyH. used|title=FITS: dataA formatFlexible inImage astronomyTransport thatSystem incorporates metadata|journal=Astronomy and asciiAstrophysics orSupplement binarySeries data|volume=44 in|pages=363–370 the|date=June same1981 file|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>{{cite journal | bibcode name=Greenfield2015 2015A&C....12..240G | title=ASDF: A new data format for astronomy | journal=Astronomy and Computing | volume=12 | page=240 | year=2015 | authors=Greenfield, P.; Droettboom, M.; Bray, E.}}</ref> By using [[YAML]], more sophisticated and nested data structures may be used in ASDF than FITS.

==See also==

* [[FITS]]

* [[YAML]]

==References==

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==External links==

* {{citeOfficial webwebsite|url=http://asdf-standard.readthedocs.org/en/latest/io}} |title=ASDF Standard — ASDF Standard 1.0.0for documentation |website=Asdf-standard.readthedocs.org |date=2015-09-18 |accessdate=2016-01-04}}

*{{cite journal|url=http://adsabs.harvard.edu/abs/2015A%26C....12..240G |title=ASDF: A new data format for astronomy |website=adsabs.harvard.edu |date= |accessdate=2016-01-04 |bibcode=2015A&C....12..240G}}

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

[[Category:Astronomy]]

[[Category:Astronomical imaging]]

[[Category:Graphics file formats]]

[[Category:Data types]]

{{astronomy-stub}}

{{photography-stub}}