There are also ground based enemies with guns as an extra threat in this zone.

Can we test the origins of the universe with our current ground and space based experiments?

No ground based observations of the comet were available.

Provides training for both national and international ground based air defence units.

These position accuracies can be further enhanced with ground based augmentation system.

If ground based scopes were adequate what was the point of Hubble?

A few minutes after its discovery, ground based telescopes began observing the field.

This system was highly optimized for classification of stars from ground based observations.

The player also has a chance to join a ground based squadron.

Here, the police could not have had reasonable and probable grounds based solely on the phone call.