Mutually validated Tilt Angle Dataset

Mutually-Validated Tilt Angle Dataset

This dataset provides reliable sunspot group/active region(AR) tilt angle data and several other parameters from 1996 to 2018.

Overview

The dataset is generated by mutually validating two existing datasets: (1) A-live-homogeneous-database-of-solar-active-regions by Ruihui Wang, Jie Jiang and Yukun Luo (WJL), and (2) Debrecen Photoheliographic Data sunspot catalogue by Baranyi, T., Győri, L. and Ludmány, A. (DPD). The original datasets can be downloaded via their websites: A-live-homogeneous-database-of-solar-active-regions and Debrecen Photoheliographic Data

The mutual validation is automatically accomplished by Python. The code, mutual_validation.py, is attached. For a more detailed description of the mutual validation method, see Lang Qin, Jie Jiang, Ruihui Wang, Mutual Validation of Datasets for Analyzing Tilt Angles in Solar Active Regions(APJ under review)

Data Description

The mutually validated datset is in the file mutually_validated_tilt_angle_dataset.xlsx. There are 14 columns, each contains a type of parameter. The meanings of each header are as follows:

date_dpd: date of observation in DPD dataset

lat_dpd: heliographic latitude of the sunspot group

lon_dpd: (Carrington) heliographic longitude of the sunspot group

area_dpd: the total area of the sunspot group in μMSH

tilt_dpd: the tilt angle of the sunspot group

date_wjl: date of observation in WJL dataset

lat_wjl: heliographic latitude of the active region

lon_wjl: (Carrington) heliographic longitude of the active region

area_wjl: the total area of the active region in μMSH

flux_wjl: the total unsigned magnetic flux of the active region in Mx

tilt_wjl: the tilt angle of the active region

number: the NOAA number

CR: the Carrington rotation number of the sunspot group/active region

consistency: the marker of whether the two tilt angle values are close enough to be considered consistent. "1" means consistent and "0" means inconsistent

Author

Lang Qin, Jie Jiang, Yukun Luo