Advantages Of Remote Sensing

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Remote sensing is the process of acquiring data or information about objects or substances not in direct contact with the sensors, by gathering its inputs using electromagnetic radiation or acoustical waves that emanate from the targets of interest. An Ariel photograph is a common example of a remotely sensed (by camera and film or now digital) product. It has evolved into an important tool for monitoring the atmosphere and surfaces of planetary objects. It has diverse applications and is very efficient technique to help the growth of economy and solve some of its problems.

The sun is a source of energy or radiation, which provides a very convenient source of energy for remote sensing, the sun’s energy is either reflected, as it is for visible
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It will discuss their operation, capabilities, applications and advantages and disadvantages over the most common remote sensing systems.

Infrared remote sensing makes use of infrared sensors to detect infrared radiation emitted from the Earth 's surface. The middle-wave infrared (MWIR) and long-wave infrared (LWIR) are within the thermal infrared region. These radiations are emitted from warm objects such as the Earth 's surface. They are used in satellite remote sensing for measurements of the earth 's land and sea surface temperature

The most commonly used microwave imaging sensor is the Synthetic Aperture Radar (SAR) that is a radar system capable of providing high-resolution microwave images. They have distinctive characteristics compared to common optical images acquired in the visible or infrared bands; for this reason, radar and optical data can be complementary, as they carry on a different informative
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Application for Land The spatial and temporal variation of soil moisture is of great Importance for crop yield models, dry land farming, status of crop health, irrigation scheduling, etc. Microwave sensing is unique for soil moisture because of its penetration capability and because of the sensitivity of microwave energy to moisture.

The microwave remote sensing can be used for study of the different target properties on earth. This technique has been successfully used for study of natural material like soil, water and snow on the earth. Different land based applications that can be studied are Soil moisture estimation, Crop identification, Flood mapping, Snow studies, Geology, Forestry, Urban land-use and hydrocarbons

Oceanographic Applications
Due to the focus on the utilisation of Exclusive Economic Zone (EEZ) in the future, applications like sea-state, ocean circulation, and shallow-water topography are of high priority. Apart from this, applications like oil pollution monitoring, retrieval of geophysical parameters of the ocean and the study of the ocean geoid are also important. The latter two are considered to be an input for meteorological

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