By Josh Gregory
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The Radio. Chicago: Heinemann Library, 2012. htm Learn more about how radar works. com/weather/map/interactive Enter your zip code to see what weather radars are showing in your area. S. , 26, 29 safety, 22 sound waves, 6–7, 8, 11–12, 16 space exploration, 22–23 submarines, 7–8, 22, 26 Watson-Watt, Sir Robert Alexander, 19 weather, 5, 15, 22 word origins, 4, 6 World War II, 6, 16, 20–21, 22, 29 About the Author Josh Gregory writes and edits books for kids. He lives in Chicago, Illinois. Fr om B ats t o .
Spilsbury, Louise, and Richard Spilsbury. The Radio. Chicago: Heinemann Library, 2012. htm Learn more about how radar works. com/weather/map/interactive Enter your zip code to see what weather radars are showing in your area. S. , 26, 29 safety, 22 sound waves, 6–7, 8, 11–12, 16 space exploration, 22–23 submarines, 7–8, 22, 26 Watson-Watt, Sir Robert Alexander, 19 weather, 5, 15, 22 word origins, 4, 6 World War II, 6, 16, 20–21, 22, 29 About the Author Josh Gregory writes and edits books for kids.
28 Robert Rines’s discoveries led to more advanced radar and sonar equipment. Fr om B ats t o . . Rad a r Ra d a r P i o n e e r s 29 nearby airplanes, but could also be used to find out exactly where they were in the sky. S. patent for radar technology. Robert H. S. Army during World War II. During the war, he helped the military develop powerful new radar systems that could display more detailed information than previous ones had. His discoveries were put to use in many other inventions, including sonar systems used to find shipwrecks and devices used to detect incoming missiles during the Persian Gulf War in 1991.