@article{Sojka2011a,
  author = "J. J. Sojka and M. Nicolls and A. van Eyken and C. Heinselman and D. Bilitza",
  title = "24/7 Solar minimum polar cap and auroral ion temperature observations",
  year =  2011 ,
  journal = "Advances in Space Research",
  volume = 48,
  keywords = "amisr, pfisr",
  doi = "10.1016/j.asr.2011.03.005"
}