"There was a feeling that satellites allowed us to get out of the dirty, messy business of spying," Mr. Lehman said.

The satellites allow anyone with specialized electronic receivers to pinpoint his position in three dimensions to within a few meters.

Due to this, terrestrial, satellite, and cable networks for television do not allow interactivity.

We'll keep you as up to date as the satellites allow.

The satellite you're carrying back there will allow a degree of verification that would've been impossible even ten years ago.

The fourth satellite will allow Japan to monitor any point on Earth once a day.

The satellites, which carry radar equipment and cameras, will allow Japan to monitor North Korea.

More tomorrow, satellite allowing.

Another major difference is that a satellite, once launched, does not allow for full maintenance, while HAPs do.

Miniaturized satellites allow for the opportunity to test new hardware with reduced expense in testing.