Flexible Image Transport System (FITS) is a digital file format used to store, transmit, and manipulate scientific and other images. FITS is the most commonly used digital file format in astronomy. Unlike many image formats, FITS is designed specifically for scientific data and hence includes many provisions for describing photometric and spatial calibration information, together with image origin metadata.

The FITS format was first standardized in 1981; it has evolved gradually since then, and the most recent version (3.0) was standardized in 2008. FITS was designed with an eye towards long-term archival storage, and the maxim once FITS, always FITS represents the requirement that developments to the format must be backwards compatible.

A major feature of the FITS format is that image metadata is stored in a human-readable ASCII header, so that an interested user can examine the headers to investigate a file of unknown provenance. The information in the header is designed to calculate the byte offset of some information in the subsequent data unit to support direct access to the data cells. Each FITS file consists of one or more headers containing ASCII card images (80 character fixed-length strings) that carry keyword/value pairs, interleaved between data blocks. The keyword/value pairs provide information such as size, origin, coordinates, binary data format, free-form comments, history of the data, and anything else the creator desires: while many keywords are reserved for FITS use, the standard allows arbitrary use of the rest of the name-space.

FITS is also often used to store non-image data, such as spectra, photon lists, data cubes, or even structured data such as multi-table databases. A FITS file may contain several extensions, and each of these may contain a data object. For example, it is possible to store x-ray and infrared exposures in the same file.

Read more about FITS:  Images, Tables, Using FITS Files, Current Status

Other articles related to "fits, fit":

FITS - Current Status - Release History
... still supported Green Current Standard Blue Future Draft FITS Version Release Date Notes 3.0 July 2008 - 2.1b December 2005 Added support for 64-bit integer primary arrays and image extensions NOST 100-2.0 ...
... CASA FITS (Fully Integrated Tactical System) is a system that is used on board aircraft from different coast guard services for tactical marine reconnaissance ... FITS is predestined for this area of application due to its real-time display of navigation data ... FITS was developed by the Spanish branch of the multinational Military Transport Aircraft Division of EADS ...
Life In One Chord
... EP released in 1987 by New Zealand band, Straitjacket Fits ... All of the songs on the EP are credited to Shayne Carter/Straitjacket Fits except for "Sparkle That Shines" (Andrew Brough/Straitjacket Fits) ...
The Hitchhiker's Guide To The Galaxy Primary And Secondary Phases - The Primary Phase
... It was split into episodes, known as "Fits" (an archaic term for a section of a poem revived by Lewis Carroll for The Hunting of the Snark) ... The original series comprised Fit the First to Fit the Sixth ... Fits the Fifth and Sixth were co-written by John Lloyd subsequent versions of the story omit most of Lloyd's material ...
CASA FITS - Orders
... FITS is a proven system The Spanish Armed Forces are already deploying it in the modernized P-3 Fleet and the Mexican Navy has installed the system in its C-212 aircraft ... Other FITS orders are for the CN aircraft of the Spanish “Sasemar” air-sea rescue service, the CN-235 operated by the Irish Air Corps and the C-295 ... But FITS is now part of the standard equipment of reconnaissance aircraft on the other side of the Atlantic The CN-235 aircraft of the US Coast Guard are also equipped with ...

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