Share This Article:

BG3 Glass Filter Effects on Quantifying Rapidly Pulsating Auroral Structures

Abstract Full-Text HTML XML Download Download as PDF (Size:2144KB) PP. 53-57
DOI: 10.4236/ars.2012.13005    2,741 Downloads   5,158 Views   Citations

ABSTRACT

The extensive use of Schott BG3 glass filters in auroral physics demands an accurate characterization of the filter performance when observing actual auroral structures. We present observations from two identical Andor DU-888 imagers operated side-by-side, one equipped with a BG3 glass filter and the other one unfiltered, observing the same auroral structures. The BG3 glass filter decreased the overall signal levels, increasing the relative intensity variations of the fast pulsating aurora by a few percent. This, however, also produced a slightly decreased signal-to-noise ratio, making it more difficult to quantify the rapidly varying auroral structures. This comparison shows that BG3 glass filters can be useful in reducing the overall signal levels which is important in dynamic, bright, substorm onset aurora, where EMCCD imager saturation has been known to occur. Consequently their use does not significantly affect the observation of the dynamics within the aurora but it also does not enhance the ability to quantify the features of rapidly varying auroral structures.

 

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

M. Samara, R. Michell and D. Hampton, "BG3 Glass Filter Effects on Quantifying Rapidly Pulsating Auroral Structures," Advances in Remote Sensing, Vol. 1 No. 3, 2012, pp. 53-57. doi: 10.4236/ars.2012.13005.

References

[1] M. Samara and R. G. Michell, “Ground-Based Observations of Diffuse Auroral Frequencies in the Context of Whistler Mode Chorus,” Journal of Geophysical Research, Vol. 115, 2010, Article ID: A00F18. doi:10.1029/2009JA014852
[2] J. Semeter, M. Zettergren, M. Diaz and S. Mende, “Wave Dispersion and the Discrete Aurora: New Constraints Derived from High-Speed Imagery,” Journal of Geophysical Research, Vol. 113, 2008, Article ID: A12208. doi:10.1029/2008JA013122
[3] A. Vallance Jones, “Auror,” Reidel Publishing Company, Dordrecht, 1974. doi:10.1007/978-94-010-2099-2
[4] F. E. Roach and L. L. Smith, “The Worldwide Morphology of the Atomic Oxygen Nightglows,” Aurora and Airglow, Staffordshire, 15-26 August 1966, p. 29.
[5] A. G. Schott, “BG3 Transmission Curve and Data,” Advanced Optics, Hellertown, 1997.
[6] D. J. McEwan, E. Yee, B. A. Whalen and A. W. Yau, “Electron Energy Measurements in Pulsating Aurora,” Canadian Journal of Physics, Vol. 59, No. 8, 1981, pp. 1106- 1115. doi:10.1139/p81-146
[7] M. J. Smith, D. A. Bryant and T. Edwards, “Pulsations in Auroral Electrons and Positive Ions,” Journal of Atmospheric and Terrestrial Physics, Vol. 42, No. 2, 1980, pp. 167-178. doi:10.1016/0021-9169(80)90077-X
[8] M. Samara, R. G. Michell, K. Asamura, M. Hirahara, D. L. Hampton, and H. C. Stenbaek-Nielsen, “Ground-Based Observations of Diffuse Auroral Structures in Conjunction with Reimei Measurements,” Annales Geophysicae, Vol. 28, No. 3, 2010, pp. 873-881. doi:10.5194/angeo-28-873-2010
[9] G. Paschmann, S. Haaland and R. Treumann, “Auroral Plasma Physics,” Kluwer Academic Publishers, Dordrecht, 2003. doi:10.1007/978-94-007-1086-3

  
comments powered by Disqus

Copyright © 2018 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.