Another method is to use real world data for example from satellites.

But most of the problems radio astronomers experience come from satellites.

Already, many news organizations occasionally use pictures from commercial satellites.

The facility began acquiring data from environmental satellites in the 1970s.

Later this month, a television set with direct feeds from satellites should be on the back of each seat.

All other programs during the remaining 20 hours are rebroadcast from satellite.

She also relayed pictures of the mountain, taken from satellite.

But he said new competition from telephone companies and satellites had ended the need for price regulation.

A composite sea level graph, using data from several satellites, is also available on that site.

They beam down to us from unauthorized satellites and we do the same to them.