[JoeAltmaier]

In fact I believe Juno has ice-penetrating radar, intended to probe for the mythical surface. We may be seeing images of its real surface for the first time soon

[mturmon]

I do not believe radar is part of the instrument set.

There is a "gravity sensor" which is really, I think, an extremely careful Doppler measurement which will allow us to infer the mass distribution within Jupiter.

[JoeAltmaier]

Yeah you're right. I was remembering the Europa probe I think. They did parts of both at the local University some years back.