Type: Journal Article
Eluszkiewicz, J., 2004: Dim prospects for radar detection of Europa’s ocean. Icarus 170, 234-236.
The thickness of a porous regolith on Europa is estimated to be ~1 km. Provided that this regolith contains as little as 1% by volume of cavities with sizes comparable to the radar wavelength, its presence poses an insurmountable obstacle in the search for Europa's ocean by means of a sounding radar.