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STSDAS data
File type: Various data file
An hdd file extension is related to the STSDAS software and used for its data files.
File type category:
Various data file
Date updated: July 11, 2019
Record marked as obsolete and not updated for a long time.
The hhd file extension is associated with the STSDAS (Space Telescope Science Data Analysis System) a software for Linux and Macintosh, which allows users to analyze astronomical data.
The hhd file stores some kind of data used by STSDAS.
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