Remote sensing
there Remote sensing is a technique deployed to obtain information about the Earth's surface without coming into direct contact with it through a particular method of capturing images. Remote sensing encompasses several stages. First, it consists of capturing and then recording the energy emitted or reflected by electromagnetic radiation. It then processes and analyzes the information in order to apply the collected information.
Remote sensing is carried out with a sensor, a specific, very high-resolution instrument that records images in the same way as a camera, but at a very high level. It can also use Material dSpying very sophisticated, as a spy camera or a mini spy camera.
The remote sensing process using the imaging system consists of seven steps:
1. The source of illumination or energy: to illuminate the target.
2. Interaction with atmosphere and radiation: a first interaction with the atmosphere during the journey between the target and the energy source and a second during the journey between the sensor and the target.
3. Interaction with the target: the energy interacts with the surface of the target.
4. Energy sensor recording: As soon as the target emits or diffuses energy, the sensor enters into remote action and records it.
5. Transmission, reception and processing of information: it is transformed into photographic or digital images when transmitted to the receiving station.
6. Interpretation and analysis: the processed image is interpreted visually or digitally to extract the information sought about the target.
7. Application: In most cases, remote sensing is used to measure, map or track changes in environmental elements.
