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GLOSSARY

Our comprehensive glossary is available to assist in your understanding of the S'COOL lesson plan vocabulary words. Please select the first letter of the word you wish to check for a definition and further information.

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All definitions

I
Imager:
Most instruments that orbit the Earth can produce pictures, but an imager is an instrument designed specifically to do that. Typically it has more spatial resolution than other instruments (that is, it can see smaller features on the surface), and it also collects energy in only a small part of the electromagnetic spectrum. Many imagers have channels in red, green, and blue light, which can be used to reconstruct true color imagery of Earth - as a person would see it. Many also have some other channels, which can be used to produce false color images that bring out specific features of interest. For more information, see an introduction to remote sensing..   MODIS Instrument
I
inches:
a unit of measurement that is most often used in the United States. An inch is equal to one twelfth of a foot it is also equal to 2.54 centimeters.  
I
Inclined Orbits:
Inclined orbits fall between those above. They have an inclination between 0 degrees (equatorial orbit) and 90 degrees (polar orbit). These orbits may be determined by the region on Earth that is of most interest (i.e., an instrument to study the tropics may be best put on a low inclination satellite), or by the latitude of the launch site. The orbital altitude of these satellites is generally on the order of a few hundred km, so the orbital period is on the order of a few hours. These satellites are not sun-synchronous, however, so they will view a place on Earth at varying times.   For more information on orbits.
I
indirect observation:
This is a unit of measurement that is most often used in the United States. An inch is equal to one twelfth of a foot; it is also equal to 2.54 centimeters.  
I
inflate:
force a gas into a hollow container, such as a balloon, to increase its size.  

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