New Satellite Programs of India

A remote sensing system is a technology that uses sensors to detect and measure electromagnetic energy emitted, reflected or backscattered from the surface of the Earth, atmosphere, or ocean. This data is then used to create images or other forms of information that can be analyzed and interpreted.

There are two main types of remote sensing systems: active and passive. Active remote sensing systems emit energy (such as radar or laser) to measure the reflection or backscatter of the energy, while passive remote sensing systems simply detect the natural radiation emitted or reflected by the Earth’s surface.