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http://eprints.org/relation/isVersionOf https://data.lancashire.ac.uk/id/document/1447 http://eprints.org/relation/isVolatileVersionOf https://data.lancashire.ac.uk/id/document/1447 http://eprints.org/relation/issmallThumbnailVersionOf https://data.lancashire.ac.uk/id/document/1447 archive 8223 disk0/00/00/06/52 2026-01-15 10:58:18 2026-06-08 14:43:59 2026-01-15 10:58:18 data_collection show Proverbs Charlotte Victoria CProverbs@lancashire.ac.uk 0009-005-5533-8425 Brown Daniel Stephen DSBrown@lancashire.ac.uk 0000-0002-1618-8816 Sunspot Rotation: SSTrack Four-Month Sample F530 2023sub_E_C_M_P Sun; sunspot; rotation; SDO; HMI These files contain calculated sunspot torsional rotation profiles for 49 active regions measured from data acquired by the HMI instrument on NASA's Solar Dynamics Observatory. Other data produced as part of the calculations (such as uncertainties, umbral areas, sunspot position, etc.) are also included with the profiles. These test regions were used as testing and development data for the automatic sunspot tracking method, SSTrack, of Proverbs and Brown. The data is provided as FITS files (one for each active region), and can easily be read into standard analysis packages used within solar physics. Directions for doing this with SSWIDL and Scientific Python are provided by Brown and Walker. 10.17030/uclan.data.00000652 dataset ST/W507386/1 STFC UKRI1203 STFC RG_096 RC04 rdmsupport@lancashire.ac.uk Postdoctoral Research Assistant Proverbs Charlotte CProverbs@lancashire.ac.uk An Automated Sunspot Identification and Tracking Algorithm to Investigate the Rotation of Sunspots thesis http://doi.org/10.17030/uclan.thesis.00058864 https://knowledge.lancashire.ac.uk/id/eprint/58864/ SSTrack: An Automatic Sunspot Identification and Tracking Algorithm to Support the Measurement of Sunspot Rotation pub https://doi.org/10.1007/s11207-026-02689-z https://knowledge.lancashire.ac.uk/59495 Original data taken from the SDO/HMI instrument. Processed using the method of Proverbs and Brown (SSTrack) and Brown and Walker (RSS) to produce bulk rotation profiles and other data. 2013-05-01 2013-08-31