Astrophysics (index)

Gravity Sounding

(measuring a planet's gravitation field by study of nearby probe flights)

The term Gravity Sounding is not widely used, but has been used regarding probes of Jupiter and Saturn. As far as I can make out, it means determining details of the gravitational field, and through it, the interior structure by precise observation of the flight path of spacecraft passing the planet.

Such observations were made with Pioneer and Cassini near Saturn and are planned for Juno when it approaches and orbits Jupiter.