DOI: 10.5281/zenodo.8412344
title: Auroral event data

description: Description:
The Aurora event data database contains two datasets: "Auroral event data" and "Dayside auroral observation". The dataset of "Auroral event data" has 14 auroral image sequences with a total of 21,372 images (total size: 1.61GB). The 14 aurora image sequences are from 2003 to 2021 as the study data of the "Unsupervised auroral event Segmentation Based on All-sky Imager Observation". The aurora event data are ground-based observation data acquired by three-wavelength (427.8, 557.7, and 630.0 nm) all-sky imaging (ASI) at YRS (the geographic coordinates are 78.92°N, 11.93°E, the corrected magnetic latitude is 76.24°N, MLT=UT+3.1h.) in Ny-Ålesund, Svalbard. The device captures an aurora image every 10 seconds with an exposure time of 7 seconds. The captured raw image is a 14-bit 512×512 pixel image. The angle between the horizontal direction of the ASI image and the magnetic meridian is 61.1°.
Data acquisition instruments:
In 2003, three all-sky CCD auroral imagers were installed to observe aurora phenomenon. This system can record 24-hour auroral activities from October to March of  each year.
File nameing convention:
Each auroral image has a unique file name that contains the N/S, date, band, and time information.
Filename example: N20031221G081212.
N: North pole
20031221:December 21, 2003
G:G-band
081212:8:12:12 UT
All aurora images are provided in .bmp image format. 
In "Auroral event data", each auroral image sequence is provided as a separate zip file, with a total of 14 segments of the aurora image sequences lasting a total of 57 hr, 12 min, 47 sec, of which:
N20031221G081212_N20031221G112151: 2003.12.21 08:12:12-11:21:51 aurora data, duration 3 hr, 9 min, 39 sec;
N20031221G112011_N20031221G142951: 2003.12.21 11:20:11-14:29:51 aurora data,duration 2 hr, 9 min, 40 sec;
N20031222G074012_N20031222G104951: 2003.12.22 07:40:12-10:49:51 aurora data, duration 3 hr, 9 min, 39 sec;
N20031222G115011_N20031222G145952: 2003.12.22 11:50:11-14:59:52 aurora data, duration 2 hr, 9 min, 41 sec;
N20031223G091111_N20031223G145951: 2003.12.23 09:11:11-14:59:51 aurora data, duration 5 hr, 48 min, 40 sec;
N20031224G115011_N20031224G145951: 2003.12.24 11:50:11-14:59:51 aurora data, duration 3 hr, 9 min, 40 sec;
N20031225G115011_N20031225G145951: 2003.12.25 11:50:11-14:59:51 aurora data, duration 3 hr, 9 min, 40 sec;
N20031226G090001_N20031226G145951: 2003.12.26 09:00:01-14:59:51 aurora data, duration 5 hr, 59 min, 50 sec;
N20031228G115250_N20031228G145952: 2003.12.28 11:52:50-14:59:52 aurora data, duration 3 hr, 7 min, 2 sec;
N20031229G092100_N20031229G145954: 2003.12.29 09:21:00-14:59:54 aurora data, duration 5 hr, 38 min, 54 sec;
N20031230G030002_N20031230G091103: 2003.12.30 03:00:02-09:11:03 aurora data, duration 6 hr, 11 min, 1 sec;
N20031230G115014_N20031230G145954: 2003.12.30 11:50:14-14:59:54 aurora data, duration 3 hr, 9 min, 40 sec;
N20031231G030003_N20031231G101004: 2003.12.31 03:00:03-10:10:04 aurora data, duration 7 hr, 10 min, 1 sec;
N20211129G130010_N20211129G160950: 2021.11.29 13:00:10-16:09:50 aurora data, duration 3 hr, 9 min, 40 sec;
In "Dayside auroral observation", two entire image sequences of dayside (03:00-15:00 UT) auroral ASI observations are provided, which is:
N20031225G: 2003.12.25 03:00:01-14:59:51 aurora data, duration 12 hr, 4320 images;
N20031228G: 2003.12.28 03:00:07-14:59:52 aurora data, duration 12 hr, 4386 images;
Cite as:
Auroral event data. 10.5281/Zenodo.10013563
The analysis and validation of the "Aurora event data" are described in our preparing paper "Unsupervised Auroral Event Segmentation Based on All-sky Imager Observation".