The Wikipedia article on radar astronomy lists a few important discoveries using radar technology in general, i.e. also using space-crafts:

The following is a list of planetary bodies that have been observed by this means:

  • Mercury - Improved value for the distance from the earth observed (GR test). Rotational period, libration, surface mapping, esp. of polar regions.
  • Venus - first radar detection in 1961. Rotation period, gross surface properties. The Magellan mission mapped the entire planet using a radar altimeter.
  • Earth - numerous airborne and spacecraft radars have mapped the entire planet [...]
  • Mars - Mapping of surface roughness from Arecibo Observatory. The Mars Express mission carries a ground-penetrating radar.
  • Jupiter System - Galilean satellites
  • Saturn System - Rings and Titan from Arecibo Observatory, mapping of Titan's surface and observations of other moons from the Cassini spacecraft.

I am interested in recent discoveries (and scientific references) with Earth-based radar observatories such as the Arecibo Observatory, the Goldstone Deep Space Communications Complex, RT-70, Pluton, Deep Space Network and any other one I missed.

Here "discovery" is meant in the wider sense, i.e. the gain of scientific knowledge. The discovery of a new object would be such a discovery, but the mapping of a known object would also be a discovery.



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