Proverbs, Charlotte Victoria and Brown, Daniel Stephen Sunspot Rotation: SSTrack Four-Month Sample. [DataSet]

Description

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.

Research / Data Type:	Dataset
Keywords:	Sun; sunspot; rotation; SDO; HMI
DOI:	10.17030/uclan.data.00000652
Research Institutes:	Jeremiah Horrocks Institute > The Sun and the Heliosphere
Depositing User:	Charlotte Proverbs
Date Deposited:	15 Jan 2026 10:58
Revision:	169
URI:	https://data.lancashire.ac.uk/id/eprint/652
Additional details Additional details Creators: Creators Email ORCID Proverbs, Charlotte Victoria CProverbs@lancashire.ac.uk 0009-005-5533-8425 Brown, Daniel Stephen DSBrown@lancashire.ac.uk 0000-0002-1618-8816 Schools: School of Engineering and Computing* > Engineering, Construction, Maths and Physics* Research Groups: Solar Physics Collection period: From To 1 May 2013 31 August 2013 Data collection method: 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. Keywords: Sun; sunspot; rotation; SDO; HMI Projects: Grant Number Funder Name Funder ID ST/W507386/1 STFC UNSPECIFIED UKRI1203 STFC UNSPECIFIED Contact email address: rdmsupport@lancashire.ac.uk Last Modified: 15 Jan 2026 10:59

Available Files

Data

RSS_AR11730_A-A_L1.1.fits RSS_AR11730_A-A_L1.1.fits RSS_AR11730_A-A_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11730 Metadata Revision: 3 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 610kB

RSS_AR11732_A-B_L1.1.fits RSS_AR11732_A-B_L1.1.fits RSS_AR11732_A-B_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11732 Metadata Revision: 2 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 1MB

RSS_AR11734_A-G_L1.1.fits RSS_AR11734_A-G_L1.1.fits RSS_AR11734_A-G_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11734 Metadata Revision: 2 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 7MB

RSS_AR11736_A-B_L1.1.fits RSS_AR11736_A-B_L1.1.fits RSS_AR11736_A-B_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11736 Metadata Revision: 3 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 696kB

RSS_AR11739_A-B_L1.1.fits RSS_AR11739_A-B_L1.1.fits RSS_AR11739_A-B_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11739 Metadata Revision: 3 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 927kB

RSS_AR11742_A-A_L1.1.fits RSS_AR11742_A-A_L1.1.fits RSS_AR11742_A-A_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11742 Metadata Revision: 3 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 276kB

RSS_AR11743_A-B_L1.1.fits RSS_AR11743_A-B_L1.1.fits RSS_AR11743_A-B_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11743 Metadata Revision: 3 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 1MB

RSS_AR11744_A-B_L1.1.fits RSS_AR11744_A-B_L1.1.fits RSS_AR11744_A-B_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11744 Metadata Revision: 3 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 1MB

RSS_AR11745_A-F_L1.1.fits RSS_AR11745_A-F_L1.1.fits RSS_AR11745_A-F_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11745 Metadata Revision: 3 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 5MB

RSS_AR11746_A-D_L1.1.fits RSS_AR11746_A-D_L1.1.fits RSS_AR11746_A-D_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11746 Metadata Revision: 3 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 4MB

RSS_AR11747_A-A_L1.1.fits RSS_AR11747_A-A_L1.1.fits RSS_AR11747_A-A_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11747 Metadata Revision: 3 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 515kB

RSS_AR11748_A-B_L1.1.fits RSS_AR11748_A-B_L1.1.fits RSS_AR11748_A-B_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11748 Metadata Revision: 3 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 2MB

RSS_AR11755_A-C_L1.1.fits RSS_AR11755_A-C_L1.1.fits RSS_AR11755_A-C_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11755 Metadata Revision: 3 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 1MB

RSS_AR11756_A-C_L1.1.fits RSS_AR11756_A-C_L1.1.fits RSS_AR11756_A-C_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11756 Metadata Revision: 3 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 2MB

RSS_AR11757_A-A_L1.1.fits RSS_AR11757_A-A_L1.1.fits RSS_AR11757_A-A_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11757 Metadata Revision: 3 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 1MB

RSS_AR11762_A-E_L1.1.fits RSS_AR11762_A-E_L1.1.fits RSS_AR11762_A-E_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11762 Metadata Revision: 3 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 2MB

RSS_AR11764_A-A_L1.1.fits RSS_AR11764_A-A_L1.1.fits RSS_AR11764_A-A_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11764 Metadata Revision: 3 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 696kB

RSS_AR11765_A-B_L1.1.fits RSS_AR11765_A-B_L1.1.fits RSS_AR11765_A-B_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11765 Metadata Revision: 3 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 912kB

RSS_AR11768_A-B_L1.1.fits RSS_AR11768_A-B_L1.1.fits RSS_AR11768_A-B_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11768 Metadata Revision: 3 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 1MB

RSS_AR11770_A-A_L1.1.fits RSS_AR11770_A-A_L1.1.fits RSS_AR11770_A-A_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11770 Metadata Revision: 3 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 1MB

RSS_AR11772_A-A_L1.1.fits RSS_AR11772_A-A_L1.1.fits RSS_AR11772_A-A_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11772 Metadata Revision: 3 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 780kB

RSS_AR11774_A-A_L1.1.fits RSS_AR11774_A-A_L1.1.fits RSS_AR11774_A-A_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11774 Metadata Revision: 3 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 699kB

RSS_AR11775_A-F_L1.1.fits RSS_AR11775_A-F_L1.1.fits RSS_AR11775_A-F_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11775 Metadata Revision: 3 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 5MB

RSS_AR11776_A-B_L1.1.fits RSS_AR11776_A-B_L1.1.fits RSS_AR11776_A-B_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11776 Metadata Revision: 3 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 1MB

RSS_AR11777_A-B_L1.1.fits RSS_AR11777_A-B_L1.1.fits RSS_AR11777_A-B_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11777 Metadata Revision: 3 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 3MB

RSS_AR11778_A-B_L1.1.fits RSS_AR11778_A-B_L1.1.fits RSS_AR11778_A-B_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11778 Metadata Revision: 3 Mime-Type: image/fits Language: English License: Apache 2.0 File size: 645kB

RSS_AR11785_A-G_L1.1.fits RSS_AR11785_A-G_L1.1.fits RSS_AR11785_A-G_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11785 Metadata Revision: 3 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 5MB

RSS_AR11787_A-B_L1.1.fits RSS_AR11787_A-B_L1.1.fits RSS_AR11787_A-B_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11787 Metadata Revision: 3 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 768kB

RSS_AR11791_A-A_L1.1.fits RSS_AR11791_A-A_L1.1.fits RSS_AR11791_A-A_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11791 Metadata Revision: 3 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 714kB

RSS_AR11793_A-D_L1.1.fits RSS_AR11793_A-D_L1.1.fits RSS_AR11793_A-D_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11793 Metadata Revision: 3 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 4MB

RSS_AR11800_A-A_L1.1.fits RSS_AR11800_A-A_L1.1.fits RSS_AR11800_A-A_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11800 Metadata Revision: 3 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 1MB

RSS_AR11801_A-A_L1.1.fits RSS_AR11801_A-A_L1.1.fits RSS_AR11801_A-A_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11801 Metadata Revision: 3 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 2MB

RSS_AR11805_A-B_L1.1.fits RSS_AR11805_A-B_L1.1.fits RSS_AR11805_A-B_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11805 Metadata Revision: 3 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 633kB

RSS_AR11806_A-A_L1.1.fits RSS_AR11806_A-A_L1.1.fits RSS_AR11806_A-A_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11806 Metadata Revision: 3 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 809kB

RSS_AR11808_A-A_L1.1.fits RSS_AR11808_A-A_L1.1.fits RSS_AR11808_A-A_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11808 Metadata Revision: 3 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 1MB

RSS_AR11809_A-A_L1.1.fits RSS_AR11809_A-A_L1.1.fits RSS_AR11809_A-A_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11809 Metadata Revision: 3 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 1MB

RSS_AR11810_A-A_L1.1.fits RSS_AR11810_A-A_L1.1.fits RSS_AR11810_A-A_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11810 Metadata Revision: 3 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 1MB

RSS_AR11813_A-A_L1.1.fits RSS_AR11813_A-A_L1.1.fits RSS_AR11813_A-A_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11813 Metadata Revision: 3 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 336kB

RSS_AR11814_A-A_L1.1.fits RSS_AR11814_A-A_L1.1.fits RSS_AR11814_A-A_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11814 Metadata Revision: 3 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 262kB

RSS_AR11817_A-D_L1.1.fits RSS_AR11817_A-D_L1.1.fits RSS_AR11817_A-D_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11817 Metadata Revision: 3 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 2MB

RSS_AR11818_A-D_L1.1.fits RSS_AR11818_A-D_L1.1.fits RSS_AR11818_A-D_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11818 Metadata Revision: 3 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 3MB

RSS_AR11820_A-A_L1.1.fits RSS_AR11820_A-A_L1.1.fits RSS_AR11820_A-A_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11820 Metadata Revision: 3 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 581kB

RSS_AR11823_A-A_L1.1.fits RSS_AR11823_A-A_L1.1.fits RSS_AR11823_A-A_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11823 Metadata Revision: 3 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 2MB

RSS_AR11824_A-A_L1.1.fits RSS_AR11824_A-A_L1.1.fits RSS_AR11824_A-A_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11824 Metadata Revision: 3 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 480kB

RSS_AR11825_A-A_L1.1.fits RSS_AR11825_A-A_L1.1.fits RSS_AR11825_A-A_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11825 Metadata Revision: 3 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 714kB

RSS_AR11827_A-B_L1.1.fits RSS_AR11827_A-B_L1.1.fits RSS_AR11827_A-B_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11827 Metadata Revision: 3 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 682kB

RSS_AR11830_A-A_L1.1.fits RSS_AR11830_A-A_L1.1.fits RSS_AR11830_A-A_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11830 Metadata Revision: 3 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 455kB

RSS_AR11835_A-B_L1.1.fits RSS_AR11835_A-B_L1.1.fits RSS_AR11835_A-B_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11835 Metadata Revision: 3 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 2MB

RSS_AR11836_A-B_L1.1.fits RSS_AR11836_A-B_L1.1.fits RSS_AR11836_A-B_L1.1.fits Visible to: Anyone Document Type : Data File Description: FITS file containing rotation data for Active Region AR11836 Metadata Revision: 3 Mime-Type: image/fits Language: English License: Creative Commons: Attribution-Noncommercial 4.0 File size: 1MB

Documentation

RSS_Documentati ... _Definition.pdf RSS_Documentati ... _Definition.pdf RSS_Documentati ... _Definition.pdf Visible to: Anyone Document Type : Documentation File Description: Documentation outlining the FITS file definition and data usage in popular packages. Created by D.S. Brown and A. Walker Metadata Revision: 4 Mime-Type: application/pdf Language: English License: Creative Commons: Attribution-Noncommercial-No Derivative Works 3.0 File size: 78kB