REMOTE SENSING, METHODS, APPLICATIONS AND LIMITATIONS Harvard Case Solution & Analysis

REMOTE SENSING, METHODS, APPLICATIONS AND LIMITATIONS Case Solution

Remote Sensing, methods, applications and limitations

Remote Sensing

The examination or gathering technique for data or information about a place or geographic region from a particular distance is known as Remote Sensing. The examinations can be done by devices such as cameras, which can be put on the ground or on sensors which can be used from ships, satellites or other aircraft units. Nowadays, it has been noted that the data is being manipulated and stored by computers. The worldwide accepted software for remote sensing includes ERDAS Imagine, ESRI, Map info and ERMapper.

History of Remote Sensing

For the first time, remote sensing with a modern approach was started in 1858 by Gaspard-Felix Tourna chin when he took aerial photographs of Paris from a hot air balloon for the first time. That was the first time remote sensing started to grow in a modern way. Later on, remote sensing began to grow when US civil war begun. The US used messenger pigeons, kites and unnamed balloons and kept them over the enemy territory and attached a camera over them to keep an eye on the enemy. However, air photography missions were developed by the military for the first time when the army used these techniques for surveillance during the world War 1 and World War 2. In today’s modern era small cameras or sensors are being used by law enforcement agencies and governments by both the techniques named and unnamed platforms to gain information for a particular territory. (Amanda Briney, 2014)

Nowadays, the remote sensing images are being captured through infra-red, correct air photos and Doppler radar. Furthermore, satellites were developed by the end of 20th century, and they still are being used to gain data on a global basis. However, these satellites are also helpful in gathering data from other planets. (Amanda Briney, 2014)

Active Sensors

The electromagnetic spectrum’s portion of microwave has been operated by active sensors most of the times,whichenables them to penetrate the atmosphere under the majority of conditions. This technique sees the required area from a baseline length. The direction of similar length changes between the target and distance.

Passive Sensors

These sensors use different types of radiometer and spectrometers. This technique is widely used in remote sensing applications majority of times. Furthermore, passive sensors use infrared, thermal infrared, and microwave portion of the electromagnetic spectrum. (NASA, 2015)

Types of Remote Sensing Data

                There are several types of data in remote sensing, which vary from each other but still they play a significant role in analyzing and interpreting the data. The first type of remote sensing data includes the collection of data by using radar. It helps the air traffic controller to navigate the airplanes correctly and to warn them about several regions that which area may face a storm or another problem. Furthermore, Doppler radar is being used widely by law enforcement agencies and other regulatory bodies to assess the driving speed and to monitor traffic..................

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