Beam It Up! Sensing From a Distance Using Electromagnetic and Acoustic Energy Pulses.

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Presentation transcript:

Beam It Up! Sensing From a Distance Using Electromagnetic and Acoustic Energy Pulses

Animals Did It First o Bats emit pulses of ultrasonic acoustic energy (“clicks”). o The reflections (“echoes”) give them information about their environment.

Lunar Laser Ranging

Scary Details

Mapping Mars with Lasers

Echo Sounding o Mapping the ocean floor with pulses of acoustic energy. o The ocean absorbs electromagnetic energy.

Side-Scan Sonar o Probes a line instead of a point.

Side-Scan Sonar Images o The S.S. Nedjan Before... And After.

A Different Kind Of Light o Radar uses radio frequency electromagnetic energy.

Not Just For Air Anymore o Ground-penetrating radar is like a seismic survey, using electromagnetic rather than acoustic energy.

From Earth To Sky o Ground- penetrating radar could detect groundwater near the Martian surface.

From Sky Back To Earth

Global Positioning o Receivers on the surface get time and position data from multiple satellites. o A little bit of math gives a pinpoint planetary position.