1.   The radio signals are bounced off a satellite.

2.   They were aimed at the sky, poised ready to bounce signals off satellites over the rim of the earth.

3.   A decade ago, these companies believed they could overcome the shortcomings of earthbound cellular systems and give mobile phone users better global coverage by bouncing signals off satellites.

4.   By bouncing radar signals off of shifting particles in the air, researchers can measure differences in frequencies to determine in which directions winds are moving and how quickly.

5.   By bouncing radar signals from Earth off Mars, they pieced together a map of how steep its slopes were.

6.   From Kabul, Al Jazeera bounces its signals off a satellite to Qatar, several hundred miles away.

7.   Guidestar is a positioning gadget that bounces signals off satellites, then reads the returning beams and figures out exactly where it is.

8.   His company had a contract to do submarine spotting, using advanced technology that bounced signals off the ocean floor.

9.   Radar is a radio signal that encounters obstacles, which bounce the signal back to an antenna.

10.   Shortwave signals are literally bounced off a layer of the atmosphere.