Released on January 14, 2003
With the help of global and local remote sensing we can have a much better understanding of global scale phenomenon. We can also quickly notice any changes to our environment. With this information we can make better informed decisions, and help us maintain nature's fragile balance.
Today, we continue to do so at a global scale under a field of study called remote sensing; which is simply observing an object, or collection of objects of interest, from a distance with the help of eyes, or sensors that observe the electromagnetic spectrum.
One of our primary tools for observing our environment are remote sensing satellites. With their sensors they can see, or sense reflected light from our oceans, land and atmosphere and help monitor their condition along with many living organisms that live within them. These satellites help us understand the overall state of health and condition of our planet.
At the same time airplanes flying over the same area of interest gathering more detail data, or what is called higher resolution data, and finally, you have a person doing the ground truthing, collecting information that will be used to help validate and calibrate aerial and spaceborne remote sending instruments.