Campbell, Bruce A., Putzig, N. E., Foss, F. J., Phillips, R. J., and Plaut, J. J. 2014. "SHARAD Signal Attenuation and Delay Offsets Due to the Martian Ionosphere."
Geoscience and Remote Sensing Letters, IEEE, 11, (3) 632–635.
https://doi.org/10.1109/LGRS.2013.2273396.