Definition of Satellite Image

Artificial satellites orbiting in space have various functions, such as emitting signals from telecommunications, collect information for strategic purposes or to predict the behavior of the weather. In any case, the satellites collect images that allow analyze all kinds of realities.

When talking about images, do not be confused what is a satellite image of a Photography. Image is any representation graph that identifies and records the Energy electromagnetic and photography depends on light. Therefore, a photograph is a specific type of image.

As we know them today, satellite images began to be used at the end of the 1950s, when satellite platforms replaced the electronic sensors of the aircraft. In this sense, there was a real revolution on the meteorology, in the telecommunications sector and in the strategy military.

Technical aspects of satellite images

Image pixels are fixed in size and correspond to a specific area of ​​terrain.

Satellite imagery sensors detect diverse information within different wavelength ranges. Typically, different digital bands are used to display an image with the three primary colors, red, green, and blue.

The advantages of satellite images

First of all, these are images that can be obtained very quickly and immediately. In fact, it can currently be done instantly through Internet.

They allow to know areas of great extension and at a low cost.

It is possible to access very remote places, since borders disappear from space and this allows it to be possible to capture any place on the planet no matter how remote it may be.

The information from the images can be combined with other information systems, such as GIS or Geographic Information Systems.

From the point of view of human curiosity, these images allow us to move virtually as if we were really in a real place.

Despite the advantages of this type of image, it must be taken into account that the image obtained presents a series of interferences that disturb the information.

Photos: Fotolia - Jim - Riko Best