Remote Sensing

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REFLECTANCE CURVES

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Remote sensors measure the electromagnetic radiation that is reflected or emitted from different objects on the Earth’s surface. It travels in electromagnetic waves

Front 2

ELECTROMAGNETIC SPECTRUM

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All of the frequencies or wavelengths of electromagnetic radiation

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REMOTE SENSING

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Making observations and measurements about something from a distance

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GROUNDTRUTHING

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Verifying information gained from remote sensing satellites by actually visiting the area being observed

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URBAN SPRAWL

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The pattern in which populations develop land that was once used for agriculture or land that was once mainly forests

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RESOURCE MANAGEMENT

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One way that remote sensing data can be useful for us - determine the best locations for a purpose (water, minerals, forests, etc.)

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SPECTRAL ANALYSIS

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Using the known spectrum of electromagnetic waves to identify images from a satellite

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TOPEX-POSEIDON

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Satellite that maps the ocean floor

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GEOSAT

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Once a top secret military satellite used to measure changes in the height of the ocean's surface, mountains, and trenches

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SONAR

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Technology based on echo-location, used to measure the ocean depth and map the ocean floor
SONAR is the most often used form of remote sensing used to map ocean floor features.

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SUBMERSIBLES

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Used to explore ocean depths, can be manned or unmanned. Examples are Jason and Alvin

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LANDSAT

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Satellite used to monitor changes on Earth's surface.

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TOPOGRAPHIC MAPS

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Maps that show elevation of the Earth's surface

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CONTOUR LINES

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Circular lines on a map that connect areas of the same elevation.

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CONTOUR INDEX

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A contour line that has the elevation marked on it

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CONTOUR INTERVALS

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The distance between two side-by-side contour lines.