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A comment on China lands rover on Mars. Parent comment

Re:China lands rover on Mars by porphyra on Saturday May 15, 2021 @01:43AM (#27162751)
It has a ground penetrating radar to see stuff 100 m below the ground, something that no other Mars rover has done before. I think that's pretty cool!
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Re:China lands rover on Mars by zoomablemind on Saturday May 15, 2021 @01:17PM (#27167027)
> ...ground penetrating radar to see stuff 100 m below the ground...

Is this type of survey also possible from the orbiter? Though it would not be as hi-def as from the land level, but more extensive coverage.

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Re:China lands rover on Mars by porphyra on Saturday May 15, 2021 @09:34PM (#27170471)
I read that ground penetrating radar only really works well if it is really close to the ground. It also only gets a thin slice of the ground so you need a rover that can move in order to image a volume.
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