Warm-Up  List the possible ways that satellites can be used to map the earth.  What are the advantages and disadvantages of using satellites to image earth?

Remote Sensing  the process of collecting data about earth’s surface from space  based on the electromagnetic spectrum or charged and or magnetic waves given off or reflected from earth.  C/hurricane_frances.html

Electromagnetic Spectrum  Energy that has has both electric and magnetic properties  Examples Visible Light Visible Light Gamma Rays Gamma Rays X-rays X-rays UV-Rays UV-Rays Infared Rays Infared Rays Raido Waves Raido Waves

Wave Characteristics  Electromagnetic spectrum is arranged by wavelength or energy  All electromagnetic waves travel at the speed of light- 300,000km/s  Each type of wave has its own frequency Number of waves passing a particular point per second Number of waves passing a particular point per second

Landsat Satellite  Receives reflected wave lengths of energy emitted by Earth’s surface  Features that can be Seen Rivers Rivers Forests Forests Radiate Temperature Differences Radiate Temperature Differences

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Topex/Posiedon Satellite  Uses radar to map features of the ocean floor

Global Positioning System

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