What is Remote Sensing?

Remote sensing is used to obtain information about objects. Data is collected with an instrument an then analysed. The instrument used is not in direct contact with the object. The platforms used are located "at a distance" from the earth’s surface (for example, aircraft and satellites). These carry sensors to observe and study the earth, its land surface, the oceans, the atmosphere and the earth's dynamics from space (ESA Eduspace).

This tutorial teaches the basics of remote sensing:

Physical basics: the electromagnetic spectrum, atmospheric influences and spectral reflectance properties
Satellite systems with different sensors and orbits, followed by an overview of exemplary earth observation satellites
Geometric, spectral, radiometric and temporal resolutions
Visual image interpretation of satellite images
Image processing and enhancement techniques
Classification techniques like unsupervised and supervised classification