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5. Absorption
The chapter elaborates on various atmospheric phenomena that influence remote sensing, particularly focusing on scattering, absorption, transmission, atmospheric windows, and spectral signatures. It details the types of orbits for remote sensing platforms, types of platforms used for data collection, and the different types of resolutions that affect image quality. Furthermore, the role of various sensors in remote sensing is explained, highlighting passive and active systems, with their respective advantages for different applications.
Sections
The absorption of electromagnetic radiation (EMR) in the atmosphere is crucial for understanding how different gases and particles interact with incident radiation.
Transmission refers to the process by which electric and electromagnetic radiation passes through the atmosphere and reaches the Earth’s surface, highlighting atmospheric windows and the impact of scattering and absorption.
The section covers the concept of spectral signatures, detailing how materials reflect and emit electromagnetic radiation across different wavelengths, which is vital in remote sensing.
This section discusses the different types of orbits used for satellites in space-borne remote sensing, focusing on geosynchronous and sun-synchronous orbits and their applications.
This section discusses the three main types of remote sensing platforms: ground-based, airborne, and space-borne platforms.
This section discusses the four main types of resolutions in remote sensing: spatial, spectral, radiometric, and temporal resolution.
This section discusses the types of sensors in remote sensing, categorizing them into passive and active sensors and their subtypes based on several factors.
Mie scattering and non-selective scattering significantly affect remote sensing data quality.
Spectral signatures of objects are crucial for distinguishing different materials in remote sensing imagery.
Different types of orbits and platforms are necessary for effectively collecting remote sensing data.
Mie Scattering
Scattering caused by particles similar in size to the wavelength of light, affecting image quality due to atmospheric haze.
Non-selective Scattering
Occurs when large particles scatter all wavelengths equally, making clouds appear white and reducing image contrast.
Absorption
The process where radiation is taken in by a medium, converting some energy into heat, affecting the apparent spectral signature of objects.
Atmospheric Windows
Regions in the atmosphere where transmission of electromagnetic radiation is maximized, allowing effective remote sensing.
Spatial Resolution
The smallest size of an object that can be reliably identified in an image, impacted by the pixel size.
Spectral Resolution
The ability of a sensor to distinguish between different wavelengths, affecting the identification of features.
Practice Exercises
Total Questions
2
Estimated Time
4 min
Passing Score
70%
Instructions
- Read each question carefully
- You can use hints if you need help
- Complete all questions before submitting
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