@article{Sparks2009a, author = "J. J. Sparks and D. Janches", title = "Latitudinal dependence of the variability of the micrometeor altitude distribution", year = 2009 , journal = "Geophys. Res. Lett.", volume = 36, keywords = "amisr, pfisr", doi = "10.1029/2009GL038485" }