terrestrial telescope

noun2

1. •
   An astronomical telescope which is physically located on the surface of the Earth, as distinct from a telescope located in outer space.
2. •
   A telescope which, unlike most telescopes used for astronomical purposes, contains an arrangement of lenses presenting an erect (non-inverted) image to the observer, suitable for observation of objects on the Earth's surface.

   • Fort Hancock, at Sandy Hook, has been supplied with an immense terrestrial telescope, to be used for vessels at sea. — 1898