The University of Southampton
University of Southampton Institutional Repository

Modelling N21P contamination in auroral O+ emissions

Spry, J.D., Jokiaho, O., Lanchester, B.S. and Whiter, D.K. (2014) Modelling N21P contamination in auroral O+ emissions Journal of Atmospheric and Solar-Terrestrial Physics, 107, pp. 8-11. (doi:10.1016/j.jastp.2013.10.013).

Record type: Article


Modelling of N21P (5,3) contamination at the O+ doublet emissions in the region of 732 nm is presented. The method is derived from a known relationship between emission from the N21P (5,3) band and emissions from the N21P (5,2), (4,1) and (3,0) bands. A synthetic molecular spectrum is used to quantify a temperature-dependent emission ratio of these band systems as a function of filter characteristics and emission altitude. Five optical observations of high-energy auroral periods on 9 January 2008 are compared with results from the synthetic spectrum. Two cameras from a high sensitivity, high frame rate (20 Hz) ground based imager in combination with a co-located high resolution spectrograph are used to identify events which are dominated by molecular nitrogen emissions. There is good agreement between the observed and modelled ratios. The temperatures associated with these ratios agree well with temperature profiles extracted from fitting the synthetic spectra to the spectrograph data. A synthetic spectrum is important for future work when the removal of N21P (5,3) contamination from O+ (2P) doublet emissions is required at high temporal resolution.

Full text not available from this repository.

More information

Accepted/In Press date: 24 October 2013
e-pub ahead of print date: 1 November 2013
Published date: January 2014
Keywords: oxygen ion doublet 732 nm, aurora, molecular nitrogen spectra, contamination
Organisations: Physics & Astronomy


Local EPrints ID: 368017
ISSN: 1364-6826
PURE UUID: 2bdfbac2-07e1-4b11-8fdc-41d3c4f33f98
ORCID for D.K. Whiter: ORCID iD

Catalogue record

Date deposited: 13 Aug 2014 13:26
Last modified: 18 Jul 2017 01:52

Export record



Author: J.D. Spry
Author: O. Jokiaho
Author: B.S. Lanchester
Author: D.K. Whiter ORCID iD

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton:

ePrints Soton supports OAI 2.0 with a base URL of

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.