@article{Sojka2009b,
author = "J. J. Sojka and M. J. Nicolls and C. J. Heinselman and J. D. Kelly",
title = "The PFISR IPY observations of ionospheric climate and weather",
year = 2009 ,
journal = "J. Atmos. Solar-Terr. Phys.",
volume = 71,
number = 6,
pages = "771-785",
keywords = "amisr, pfisr",
doi = "10.1016/j.jastp.2009.01.001"
}