Dataset title: Dataset for Horizontal electric fields from flow of auroral O+(2P) ions at sub-second temporal resolution
Dataset DOI: https://doi.org/10.5258/SOTON/D1460
Readme author: Dan Whiter, University of Southampton (ORCID 0000-0001-7130-232X)

Auroral Structure and Kinetics (ASK) data for
Tuttle et al. (2020), Horizontal electric fields from flow of auroral O+(2P) ions at sub-second resolution Ann. Geophys., 
doi:

ZIP file contains images in PNG format. The four sections of the images are:
Top-left: ASK1, N2 1P, 673.0 nm
Bottom-left: ASK2, O+ 2D-2P, 732.0 nm
Bottom-right: ASK3, OI, 777.4 nm
Top-right: The other 3 images reproduced in RGB format, with ASK1,2,3 in
           the R,G,B channels respectively.

The image file name is the frame number, starting at 17400, which corresponds
to 2006/11/09 21:24:54.950 UT. The frame rate is 20 Hz. The final image is
frame number 17799, which corresponds to 2006/11/09 21:25:14.900.

The field of view is 3.1 deg x 3.1 deg, and the centre of each image is
pointed at local magnetic zenith, 76.9 deg elevation and 185.8 deg east of
north. The pixel scale is 0.01225 deg/pixel. The field of view is identical
for each of the 3 cameras.

The location of the instrument is 69.60N, 19.20E, at the EISCAT Tromso
(Ramfjordmoen) site, specifically the "PRE" building, close to the EISCAT
heating facility.

The cameras themselves are Andor iXon EMCCD cameras, with a sensor of
512 x 512 pixels which are binned down to 256 x 256 pixels.

For a full description of the ASK instrument see e.g.
Dahlgren, et al. (2008), Ann. Geophys., doi:10.5194/angeo-26-1041-2008.

Licence:Creative commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)

Created July, 2020