@article{Akbari2014a, author = "H. Akbari and J. L. Semeter", title = "Aspect angle dependence of naturally enhanced ion acoustic lines", year = 2014 , journal = "J. Geophys. Res.", volume = 119, keywords = "amisr, pfisr, pfrr", doi = "10.1002/2014JA019835" }