Starlink Data Format
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General description
Starlink Data Format (SDF) files are a container format, primarily for astronomical data, developed by the UK Starlink Project (1980--2005).
The main 'user' of .sdf files was the same project's higher-level NDF format.
Other information
The Starlink Project[1] ran from 1980 to 2005, and has been supported, since its funding ended, by the Joint Astronomy Centre, Hawai`i. It's now now maintained by the East Asian Observatory.
There is no standard SDF MIME type. Almost all SDF files used a .sdf file extension.
Software
The Starlink software suite reads, writes and manipulates SDF files.
Sample files
Identification
SDF format changed from HDF4 to HDF5 in 2018.[2]
