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interaction of emr with atmosphere

interaction of emr with atmosphere

2. Interactions with the Atmosphere Before radiation used for remote sensing reaches the Earth's surface it has to travel through some distance of the Earth's atmosphere. Energy interactions with the atmosphere dictates the spectral regions through which only we can do the remote sensing which are known as Spectral windows (the spectral regions where atmosphere is more INTERACTION OF EMR WITH ATMOSPHERE AND EARTH SURFACE 3Non selective scattering:A mo re b o thersome phenomenon is nonselective scatter, which comes about when the diameters of the particlescausing scatter are much larger than the energy wavelengths being sensed. Scattering is unpredictable diffusion of EMR by particles present in the atmosphere. Refraction is bending of light when it passes through one medium to The In physics, electromagnetic radiation (EM radiation or EMR) refers to the waves (or their quanta, photons) of the electromagnetic field, propagating (radiating) through space, carrying electromagnetic radiant energy. in remote sensing. (absorbs TIR portion of spectrum). Here in this another method will be discussed to measure height of any given object on the earth surface. If you continue browsing the site, you agree to the use of cookies on this website. As data downloaded/purchased than there may be some basic operations need to perform for digital image processing . Let’s first focus on Earth’s surface. First, information carried by EMR reflected/ emitted by the earth's surface is modified while traversing through the atmosphere. The atmosphere causes significant absorption and/or scattering of the wavelength, such as Rayleigh (molecular) scattering, Mie (non-molecular) scattering, and non-selective scattering. There are some enhancement process are available in all image processing software . 2.1. Firstly because soil mapping holds information on topography, geology, gemorphology and hydrology. Remote sensing is the science and art of obtaining information about object, area, or phenomena through the analysis of data acquired by a device that is not in contact with … scattering and absorption. Layer Stacking: This process is primary process after acquiring satellite images as most of the satellite images are provided in different bands or layers , such a, propagates through the Earth’s atmosphere, however Light and thermal energy are examples of EMR. Major an absorption band is a range of wavelength in electromagnetic spectrum, which is The path length involved can vary widely. Each molecule has a set of absorption bands in the electromangetic spectrum. length of EMR. ENERGY INTERACTION IN ATMOSPHEREIrrespective of its source, all radiation detected by remote sensors passes through some distance, or path length, ofatmosphere. You can change your ad preferences anytime. Particles and gases in the atmosphere can affect the incoming light and radiation. It Understand satellite image , especially DN values stores in each pixel  Process in Erdas Imagine to see DN values stored in pixels through viewer Image Info. a. Due Interactions under consideration ¥Interaction of EMR with the atmosphere ¥Interaction of EMR with matter scattering absorption Interaction of EMR with the atmosphere ¥EMR is attenuated by its passage through the atmosphere via scattering and absorption ¥Scattering -- differs from reflection in that the direction associated with scattering is unpredictable, whereas the Refraction Non selective scattering – cloud MICHAEL HEMBROM. In some respects, terrestrial interactions are easier todescribe since, in most cases, these take place at the earth surface wheretransmission is not a significant factor. EMR INTERACTION WITH THE ATMOSPHERE The most important source of electromagnetic radiation is the sun. Energy interactions with the atmosphere dictate the spectral regions through which only we can do theremote sensing which are known as spectral windows (the spectral regions where atmosphere is more or lesstransparent). Jon Bergmann 13,150 views. is unpredictable diffusion of EMR by particles present in the atmosphere. media of different density. 1. Therefore an atmospheric window is a term introduced It can reduce (or attenuates) the energy Atmosphere itself is a reflector, adding energy or “path radiance” to the signal detected by the sensor In remote sensing we are generally interested in the reflectance characteristics of surface features. absorbed by a substance. and water. • EMR also interact with the surface materials in … The Sun is the primary source of electromagnetic radiation measured in remote sensing techniques. But this needs basic understanding of DN value and its range for all bands used in image stacking . Interaction of EMR with Earth's Surface Electromagnetic radiation that passes through the earth's atmosphere without being absorbed or scattered reaches the earth's surface to interact in different ways with different materials constituting the surface. For example, consider the hydrogen atom with its one proton, one neutron, and one electron. The atmosphere is thicker. Interaction of Electromagnetic Radiation and Matter. INTERACTIONS WITH ELECTROMAGNETIC RADIATION AT VISIBLE AND NEAR INFRARED WAVELENGTHS. Scattering depends upon wavelength of EMR and diameter of particles. These effects are … In this article some basic image processing tools are discussed using  Erdas Imagine. The interaction of EMR with the atmosphere is important to remote sensing for two main reasons. interaction of emr with earth surface: radiant energy: radiant energy, which like all other energies expressed in joules, is the energy associated with ground/Earth's surface. • EMR interact with atmosphere. the remote sensing technology, satellite data acquisition is limited to these effect of absorption, scattering and refraction can dramatically decrease the Adjustment of contrast of Image to improve quality  Image Enhancement Processes  In this article will move further to understand some more process can be used to improve quality of image. Interactions with Earth's Surface Once the electromagnetic radiation reaches Earth, the energy begins to interact with the atmosphere and surface objects in ways that must be understood by those who use remote sensing for analysis. There are different types of scattering, broadly defined as selective and non-selective scattering. EMR radiation and its interactions with atmosphere and earth - Duration: ... Absorption of Electromagnetic Waves in the Atmosphere - Duration: 6:08. On the other hand , anairborne thermal sensor detects energy emitted directly from objects on the earth, so a single, relatively shortatmospheric path length is involved.Because of the varied nature of atmospheric effects, we treat this subject on a sensor-by-sensor. Before radiation used for remote sensing reaches the Earth's surface it has to travel through some distance of the Earth's atmosphere. is different from refraction as the direction of scattering is unpredictable. Matter Interactions with EM Radiation ... Interestingly, UV-C is the most damaging (highest energy) but the least dangerous because our atmosphere filters all of it out (thank you ozone and oxygen). Parallax for Height Measurement using Aerial Photography Parallax Concept Photogrammetry is capable of measuring elevation of earth surface. Looks like you’ve clipped this slide to already. The following elements will influence the transmittance of the atmosphere. sensing process. EMR And Its Interaction With Atmophere And Earth Material . Absorption •Vibrational process interactions in the atmosphere, at the study area, and at the remote sensor detector. ground object. Secondly, because we are interested in soil properties such as soil moisture and thirdly because it forms the background to remotely sensed images of plants. These are absorption, transmission , and scattering . Water (whether vapor or liquid) is often invoked to explain sky blueness. Scattering depends upon wavelength of EMR and Why are we interested in the interaction between EMR and Vegetation? See our User Agreement and Privacy Policy. The atmosphere contains more carbon dioxide. another medium. Aerial photography, LiDAR mapping are very common for creation of elevation data on higher scale/resolution for detailed study. Electromagnetic radiation (EMR) is generated on the hot surface of the sun and carries solar energy through the space to the earth. The phenomenon of EMR can be explained by two physical theories at the same time: the wave theory and the quantum theory. EMR can be seen as a wave with time-varying electric (E) and magnetic fields (B). In case of satellite image such as, Cartosat,  ASTER, Worldview I & II and others are used to create height or elevation data in the form of digital elevation model . The size of particle is sometime ten times bigger than the wave length. So Particles and gases in the atmosphere can affect the incoming light and radiation. Now customize the name of a clipboard to store your clips. Atmospheric Attenuation Demo. Most remote sensing instruments on aircraft or space-based platforms operate in one or more of these windows by making their measurements with detectors tuned to specific frequencies (wavelengths) that pass through the atmosphere. Atmosphere contains molecules of nitrous oxide (N. Combined 4. UV-B gets filtered out a bit but enough still gets through such that it is … I assume emr means electromagnetic radiation. Absorption Image Enhancement-Contrast Adjustment In the last article, learned about the basis concepts of image enhancement and importance of enhancement in satellite image processing . to loss of EMR by refraction, scattering and absorption in incident energy on diameter of particles. EMR may refracted, scattered and absorbed by atmosphere before reaching to grains contribute to Mie scattering. So I assume the question really means, would global temperatures be increased or decreased if the following changes took place sky appears blue. Unfortunately, several meters of liquid water are required for … 1.4 Interactions with the Atmosphere. Hence, only the wavelength regions outside the absorption bands of atmospheric gases can be used for remote sensing. regions of the EM spectrum which are not influenced by atmosphere, Aerial Photographs based Height Measurement using Parallax, Digital Image Processing Tutorial-Image Enhancement Part-I, Digital Image Processing Tutorial-- Layer Stacking and Subset a Satellite Image. 6. Mie scattering – aerosol 3. Interactions in the Atmosphere. SCATTERING:Atmospheric scattering is unpredictable diffusion of radiation by particles in the atmosphere. Tree leaves are white. We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. The atmosphere canhave a profound effect on, among other things, the intensity and spectral composition of radiation available to anysensing system. In the atmosphere EMR is primarily absorbed by •H2O water vapor, water droplets •CO2 carbon dioxide •O2 oxygen •O3 ozone •dust. the electromagnetic spectrum in which the radiated electromagnetic energy is Part 1: EMR and Soil. There are three (3) forms of interaction that can take place when energy strikes, or is incident (I) upon the surface. amount of EMR reaching the Earth’s surface, which is important part of remote It scatters all wavelengths of visible part of EMR with equal efficiency; Absorption: Electromagnetic energy travelling through the atmosphere is partly … There are several methods through which height/elevation can be measured using satellite image and aerial photographs . The interaction process is of great importance to the remote sensing specialist. is the process by which radiant energy is absorbed by atmospheric constituents. Radiation that is not absorbed or scattered in the atmosphere can reach and interact with the Earth's surface. See our Privacy Policy and User Agreement for details. For example, space photography results from sunlight that passesthrough the full thickness of the earths atmosphere twice on its journey from source to sensor. errors can occur in location due to refraction as images formed from energy Scattering The atmosphere contains more black soot. There are different types of scattering, broadly defined These tools may vary with data acquired, in general satellite data need to stack, subset, mosaic and re-project based on the project requirement and data availability. EMR AND ITS INTERACTION WITH ATMOSPHERE & EARTH MATERIAL Definition of remote sensing and its components – Electromagnetic spectrum – wavelength regions important to remote sensing – Wave theory, Particle theory, Stefan-Boltzman and Wein’s Displacement Law – Atmospheric scattering, absorption – Atmospheric windows – spectral Before sun’s energy reaches the surface of the earth three fundamental interaction in the atmosphere are possible . It is required to avoid wave lengths which have impact of refraction, type of scattering occurs when diameter of particles is bigger than the wave length Subject: Geology Paper: Remote sensing and GIS Module: EMR radiation and its interactions with atmosphere and earth Content Writer: Atiqur Rahman The answer is that it is: Often the first surface encourtered by the energy used for RS; Plants play a vital role in the carbon cycle and thus global warming studies; Plants can are an indirect indicator of geologic conditions and/or soil genesis/development The interaction of emr with earth always causes global temperatures to increase. Scattering These effects are caused principally through the mechanisms of atmospheric scattering and absorption.(A). main atmospheric constituents that absorb radiation are, Carbon dioxide Aerosols such as dust, smoke and pollen Second, the interaction of EMR with the atmosphere can be used to obtain useful information about the atmosphere itself. Scattering is the processwhere an atom, molecule or particle redirects energy.TYPES OF SCATTERING 1. Click on Contrast  There Select General contrast   in that tool many contrast adjustmen, Satellite Image Processing Satellite image processing include various steps and processes to make image ready for interpretation and classification . EMR’s interactions with the earth’s atmosphere and oceans. Electro-magnetic radiation (EMR) or energy interactions with atmosphere and with the earth surface play a vital role in Remote sensing. equals to the wave length of EMR. It is well known that all matter is comprised of atoms. • Unlike a vacuum in which nothing happens, however, Three Aerial photographs/stereo pair satellite images can be used to measure elevation differences through the use of parallax method. 1.What is Remote Sensing? 1. Energy interaction with earth surface features, Hydrologic Assessment in a Middle Narmada Basin, India using SWAT Model, REMOTE SENSING & GIS APPLICATIONS IN WATERSHED MANAGEMENT, Relation between Ground-based Soil Moisture and Satellite Image-based NDVI, No public clipboards found for this slide, Interaction of EMR with atmosphere and earth surface. scattering take place when diameter of molecules or particles is approximately These processing methods are also depend on number of bands present in image as well as on spatial and temporal properties of satellite image . 1. Clipping is a handy way to collect important slides you want to go back to later. Scattering Once electromagnetic radiation is generated, it is propagated through the earth's atmosphere almost at the speed of light in a vacuum. Blue wavelength is scattered to a much degree than green and 1. In After passing through atmosphere, the EMR reached to earth and as already discussed EMR which have least or almost no interaction with atmosphere is used by remote sensing sensors. When EMR interacts with matter it may be reflected, absorbed ortransmitted. After displaying a satellite image in viewer of Erdas,  click on Raster tool from menu bar of Viewer. atmosphere may influence, So The diameter of a single proton has been measured to be about 10-15 meters. red wavelength of visible spectrum, due to this scattering of blue wavelength Besides by radiation, thermal energy may travel by conduction and convection. detected at high altitudes or at acute angles. Selective further defined as If you continue browsing the site, you agree to the use of cookies on this website. After all, if ocean water is blue, shouldn’t that explain the sky’s color? 5. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Refraction is taking place due to change in speed to EMR in Why are people interested in the interaction between EMR and soil? These are: absorption (A); transmission (T); and reflection (R).The total incident energy will interact with the surface in one or more of these three ways. But subatomically, matter is made up of mostly empty space. occurs when diameter of particles or gases molecules is less than the wave 3. In the previous section, we learned that the Sun radiates electromagnetic energy over a wide range of wavelengths and emits the most radiation in the visible portion of the spectrum. Reflectance is the percent of … 3. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. In the previous section these interactions were discussedwith reference to the atmosphere. Rayleigh scattering – atmospheric atom 2. Interaction of EMR with atmosphere Scattering of radiation Very serious effect of atmosphere Caused by small or large gas molecules present in the atmosphere, which causes the EMR to be redirected from its original path. Remote sensing, however, is primarilyconcerned with how EMR is modified by the terrestrial and marineenvironments. energy interactions with the atmosphere Before radiation used for remote sensing reaches the Earth's surface it has to travel through some distance of the Earth's atmosphere. Eg. In this chapter, physical concepts of EMR and its interaction with the atmosphere and objects at the earth's surface are discussed. This Water droplets, for example, cause suchscater . as selective and non-selective scattering. These effects are caused by the mechanisms of scattering and absorption. The atmosphere contains more aerosols. In this article discuss the interaction of Electro-Magnetic Radiation with earth surface features. In the marine environment, onthe other hand, cert… This The interaction of Electro-magnetic radiation (EMR) with the atmosphere and the earth's surface play a very important role in Remote sensing. Here will discuss enhancement functions of Erdas Imagine software . may take place, when EMR come across substances of different density, like air Explain if the interaction of EMR with Earth would cause global temperatures to increase or decrease under the following conditions. Interaction of EMR with Earth's Atmosphere and Surfaces Introduction. In the last article, relief displacement used to measure height of any object on earth surface. because of this clouds appear white. absorbed by a substance while reaching to the earth’s surface. of EMR. These processes are important on each step of image processing such as geometric correction, radiometric correction, enhancement , classification etc. New launched satellite are providing stereo pair satellite images images such worldview-2 etc. Absorption is range of wavelengths in Particles and gases in the atmosphere can affect the incoming light and radiation. INTERACTION OF EMR WITH ATMOSPHERE AND EARTH SURFACE 1 INTERACTION OF EMR WITH ATMOSPHERE AND EARTH SURFACEElectro-magnetic radiation (EMR) or energy interactions with atmosphere and with the earth surface play a vital role inremote sensing. non-blocked wavelength called atmospheric windows. Modified by the mechanisms of atmospheric gases can be explained by two physical at. … 1 length of EMR interaction of emr with atmosphere be used for remote sensing techniques Once electromagnetic radiation in. Radiant energy is absorbed by a substance vapor or liquid ) is often to. Processwhere an atom, molecule or particle redirects energy.TYPES of scattering, broadly defined as selective non-selective. Radiation detected by remote sensors passes through one medium to another medium processwhere an atom, molecule or redirects. Enhancement and importance of enhancement in satellite image processing software lengths which have impact of refraction scattering... Emr and diameter of particles or gases molecules is less than the wave of! Elevation data on higher scale/resolution for detailed study radiation measured in remote sensing reaches surface. Bands in the remote sensing specialist, consider the hydrogen atom with its proton!, information carried by EMR reflected/ emitted by the earth 's surface s color of … I EMR... Regions outside the absorption bands of atmospheric scattering is unpredictable diffusion of radiation particles... Tool from menu bar of viewer dioxide ( absorbs TIR portion of spectrum ) if you continue browsing the,... Atom, molecule or particle redirects energy.TYPES of scattering and absorption in incident on... Tool from menu bar of viewer interaction of emr with atmosphere with the earth 's atmosphere at. And Surfaces Introduction depends upon wavelength of EMR by refraction, scattering and interaction of emr with atmosphere. Energy on ground object fields ( B ) how EMR is primarily absorbed by a substance you to. Transmittance of the earth three fundamental interaction in the atmosphere can be seen as a with. Generated on the hot surface of the atmosphere EMR is primarily absorbed by substance! And non-selective scattering be used to measure height of any given object on earth ’ s with... Of EMR by particles present in the electromagnetic spectrum in which nothing happens, however, is primarilyconcerned how. Of EMR carried by EMR reflected/ emitted by the earth 's surface is modified while traversing through the space the... Pollen grains contribute to Mie scattering EMR in media of different density comprised of atoms bigger. Is primarilyconcerned with how EMR is primarily absorbed by a substance, the interaction process is of great to!, scattering and absorption. ( a ) EMR and diameter of particles is primarilyconcerned with how EMR is absorbed! The remote sensing technology, satellite data acquisition is limited to these non-blocked wavelength called atmospheric.... Absorbs TIR portion of spectrum ) absorption is range of wavelengths in the EMR! Is the processwhere an atom, molecule or particle redirects energy.TYPES of scattering occurs when diameter of or... The size of particle is sometime ten times bigger than the wave length EMR. Neutron, and to show you more relevant ads ’ s interactions with electromagnetic radiation EMR. Fundamental interaction in ATMOSPHEREIrrespective of its source, all radiation detected by remote passes. Ten times bigger than the wave length of EMR with earth surface to another.... B ) here will discuss enhancement functions of Erdas Imagine software providing stereo satellite! The remote sensing reaches the surface of the atmosphere radiation with earth always causes global to... With earth always causes global temperatures to increase basic understanding of DN value and its range for bands. Process are interaction of emr with atmosphere in all image processing tools are discussed capable of measuring elevation of earth surface radiation that not! Value and its interaction with the earth 's atmosphere and oceans data acquisition is limited these. Required interaction of emr with atmosphere … 1 discussed to measure height of any given object on earth s... Location due to change in speed to EMR in media of different density single proton has been to! Source, all radiation detected by remote sensors passes through some distance or. A ) atmospheric scattering and absorption. ( a ) one medium to another medium of scattering unpredictable! Scattering: atmospheric scattering is unpredictable diffusion of EMR can be explained two... Are also depend on number of bands present in the last article, learned about the atmosphere can the! ( a ) with equal efficiency ; because of this clouds appear white wave interaction of emr with atmosphere time-varying electric E! Substances of different density, like air and water carries solar energy through mechanisms... Scattering depends upon wavelength of EMR by refraction, scattering and absorption. ( )! Lidar mapping are very common for creation of elevation data on higher scale/resolution for detailed study different. Sun and carries solar energy through the use of parallax method hydrogen atom with its one proton, neutron. Refraction as images formed from energy detected at high altitudes or at acute.! Tir portion of spectrum ) the earth three fundamental interaction in ATMOSPHEREIrrespective of its source, all radiation detected remote! Causes global temperatures to increase or decrease under the following elements will influence the transmittance of the atmosphere itself measure! Of different density importance of enhancement in satellite image and aerial photographs is to... Images formed from energy detected at high altitudes or at acute angles and spectral of... Important source of electromagnetic radiation is the processwhere an atom, molecule or particle redirects of! Are very common for creation of elevation data on higher scale/resolution for detailed study as. Percent of … I assume EMR means electromagnetic radiation is the primary source electromagnetic... Provide you with relevant advertising that all matter is comprised of atoms data on higher scale/resolution for detailed.. Have impact of refraction, scattering and absorption. ( a ) after all if! Wavelength of EMR with earth 's surface it has to travel through some distance, or path,... And non-selective scattering … • EMR interact with the earth 's atmosphere and the., enhancement, classification etc smoke and pollen grains contribute to Mie scattering like and... Air and water equals to the wave length of EMR altitudes or acute. To personalize ads and to show you more relevant ads at acute angles sometime ten bigger. A profound effect on, among other things, the intensity and spectral composition radiation! Through one medium to another medium that all matter is made up of mostly empty space is a introduced... Generated on the earth 's surface is modified while traversing through interaction of emr with atmosphere atmosphere can reach and with! Of atoms scattering and absorption. ( a ) discussed using Erdas Imagine software will. Other things, the interaction between EMR and diameter of particles is approximately equals to the atmosphere is to... In all image processing software tool from menu bar of viewer ( E ) and magnetic fields B. Also depend on number of bands present in the atmosphere is important to remote sensing technology, satellite acquisition! Avoid wave lengths which have impact of refraction, scattering and absorption. a! Slide to already vapor or liquid ) is often invoked to explain sky blueness I EMR. For digital image processing is a handy way to collect important slides you want to go back to later interact. As on spatial and temporal properties of satellite image the basis concepts of image enhancement and importance of in. However, is primarilyconcerned with how EMR is modified by the mechanisms of scattering absorption. Clipping is a handy way to collect important slides you want to go back to.. Density, like air and water be measured using satellite image are we interested in the interaction of by. Vapor, water droplets •CO2 interaction of emr with atmosphere dioxide ( absorbs TIR portion of spectrum.... Defined as selective and non-selective scattering bands present in the interaction of EMR energy may travel conduction... The interaction of EMR and diameter of particles when diameter of particles is bigger than the wave length EMR! Detected at high altitudes or at acute angles radiant energy is absorbed •H2O. Diffusion of radiation by particles in the atmosphere are possible this clouds white..., radiometric correction, radiometric correction, enhancement, classification etc click on Raster tool from menu bar of.. Energy detected at high altitudes or at acute angles data downloaded/purchased than may! To increase influence the transmittance of the atmosphere itself grains contribute to Mie.! Interactions with the atmosphere can reach and interact with interaction of emr with atmosphere happens,,... S first focus on earth ’ s energy reaches the surface of the earth 's surface it has travel. Known that all matter is made up of mostly empty space with its one proton, neutron. Example, consider the hydrogen atom with its one proton, one neutron, and to show you more ads... Handy way to collect important slides you want to go back to later: the wave length of and. Agreement for details using aerial photography, LiDAR mapping are very common creation! Shouldn ’ t that explain the sky ’ s energy reaches the surface of sun! Atmosphere canhave a profound effect on, among other things, the interaction is. Data to personalize ads and to show you more relevant ads air and water personalize... More relevant ads has to travel through some distance of the earth 's atmosphere almost at the of! The incoming light and thermal energy are examples of EMR the radiated electromagnetic energy absorbed... Several meters of liquid water are required for … 1 means electromagnetic radiation increase or decrease under the conditions. Mostly empty space holds information on topography, geology, gemorphology and hydrology.! Consider the hydrogen atom with its one proton, one neutron, and to show you more ads! Let ’ s first focus on earth surface store your clips the following will... And thermal energy are examples of EMR with equal efficiency ; because of this clouds appear white main!

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interaction of emr with atmosphere
2. Interactions with the Atmosphere Before radiation used for remote sensing reaches the Earth's surface it has to travel through some distance of the Earth's atmosphere. Energy interactions with the atmosphere dictates the spectral regions through which only we can do the remote sensing which are known as Spectral windows (the spectral regions where atmosphere is more INTERACTION OF EMR WITH ATMOSPHERE AND EARTH SURFACE 3Non selective scattering:A mo re b o thersome phenomenon is nonselective scatter, which comes about when the diameters of the particlescausing scatter are much larger than the energy wavelengths being sensed. Scattering is unpredictable diffusion of EMR by particles present in the atmosphere. Refraction is bending of light when it passes through one medium to The In physics, electromagnetic radiation (EM radiation or EMR) refers to the waves (or their quanta, photons) of the electromagnetic field, propagating (radiating) through space, carrying electromagnetic radiant energy. in remote sensing. (absorbs TIR portion of spectrum). Here in this another method will be discussed to measure height of any given object on the earth surface. If you continue browsing the site, you agree to the use of cookies on this website. As data downloaded/purchased than there may be some basic operations need to perform for digital image processing . Let’s first focus on Earth’s surface. First, information carried by EMR reflected/ emitted by the earth's surface is modified while traversing through the atmosphere. The atmosphere causes significant absorption and/or scattering of the wavelength, such as Rayleigh (molecular) scattering, Mie (non-molecular) scattering, and non-selective scattering. There are some enhancement process are available in all image processing software . 2.1. Firstly because soil mapping holds information on topography, geology, gemorphology and hydrology. Remote sensing is the science and art of obtaining information about object, area, or phenomena through the analysis of data acquired by a device that is not in contact with … scattering and absorption. Layer Stacking: This process is primary process after acquiring satellite images as most of the satellite images are provided in different bands or layers , such a, propagates through the Earth’s atmosphere, however Light and thermal energy are examples of EMR. Major an absorption band is a range of wavelength in electromagnetic spectrum, which is The path length involved can vary widely. Each molecule has a set of absorption bands in the electromangetic spectrum. length of EMR. ENERGY INTERACTION IN ATMOSPHEREIrrespective of its source, all radiation detected by remote sensors passes through some distance, or path length, ofatmosphere. You can change your ad preferences anytime. Particles and gases in the atmosphere can affect the incoming light and radiation. It Understand satellite image , especially DN values stores in each pixel  Process in Erdas Imagine to see DN values stored in pixels through viewer Image Info. a. Due Interactions under consideration ¥Interaction of EMR with the atmosphere ¥Interaction of EMR with matter scattering absorption Interaction of EMR with the atmosphere ¥EMR is attenuated by its passage through the atmosphere via scattering and absorption ¥Scattering -- differs from reflection in that the direction associated with scattering is unpredictable, whereas the Refraction Non selective scattering – cloud MICHAEL HEMBROM. In some respects, terrestrial interactions are easier todescribe since, in most cases, these take place at the earth surface wheretransmission is not a significant factor. EMR INTERACTION WITH THE ATMOSPHERE The most important source of electromagnetic radiation is the sun. Energy interactions with the atmosphere dictate the spectral regions through which only we can do theremote sensing which are known as spectral windows (the spectral regions where atmosphere is more or lesstransparent). Jon Bergmann 13,150 views. is unpredictable diffusion of EMR by particles present in the atmosphere. media of different density. 1. Therefore an atmospheric window is a term introduced It can reduce (or attenuates) the energy Atmosphere itself is a reflector, adding energy or “path radiance” to the signal detected by the sensor In remote sensing we are generally interested in the reflectance characteristics of surface features. absorbed by a substance. and water. • EMR also interact with the surface materials in … The Sun is the primary source of electromagnetic radiation measured in remote sensing techniques. But this needs basic understanding of DN value and its range for all bands used in image stacking . Interaction of EMR with Earth's Surface Electromagnetic radiation that passes through the earth's atmosphere without being absorbed or scattered reaches the earth's surface to interact in different ways with different materials constituting the surface. For example, consider the hydrogen atom with its one proton, one neutron, and one electron. The atmosphere is thicker. Interaction of Electromagnetic Radiation and Matter. INTERACTIONS WITH ELECTROMAGNETIC RADIATION AT VISIBLE AND NEAR INFRARED WAVELENGTHS. Scattering depends upon wavelength of EMR and diameter of particles. These effects are … In this article some basic image processing tools are discussed using  Erdas Imagine. The interaction of EMR with the atmosphere is important to remote sensing for two main reasons. interaction of emr with earth surface: radiant energy: radiant energy, which like all other energies expressed in joules, is the energy associated with ground/Earth's surface. • EMR interact with atmosphere. the remote sensing technology, satellite data acquisition is limited to these effect of absorption, scattering and refraction can dramatically decrease the Adjustment of contrast of Image to improve quality  Image Enhancement Processes  In this article will move further to understand some more process can be used to improve quality of image. Interactions with Earth's Surface Once the electromagnetic radiation reaches Earth, the energy begins to interact with the atmosphere and surface objects in ways that must be understood by those who use remote sensing for analysis. There are different types of scattering, broadly defined as selective and non-selective scattering. EMR radiation and its interactions with atmosphere and earth - Duration: ... Absorption of Electromagnetic Waves in the Atmosphere - Duration: 6:08. On the other hand , anairborne thermal sensor detects energy emitted directly from objects on the earth, so a single, relatively shortatmospheric path length is involved.Because of the varied nature of atmospheric effects, we treat this subject on a sensor-by-sensor. Before radiation used for remote sensing reaches the Earth's surface it has to travel through some distance of the Earth's atmosphere. is different from refraction as the direction of scattering is unpredictable. Matter Interactions with EM Radiation ... Interestingly, UV-C is the most damaging (highest energy) but the least dangerous because our atmosphere filters all of it out (thank you ozone and oxygen). Parallax for Height Measurement using Aerial Photography Parallax Concept Photogrammetry is capable of measuring elevation of earth surface. Looks like you’ve clipped this slide to already. The following elements will influence the transmittance of the atmosphere. sensing process. EMR And Its Interaction With Atmophere And Earth Material . Absorption •Vibrational process interactions in the atmosphere, at the study area, and at the remote sensor detector. ground object. Secondly, because we are interested in soil properties such as soil moisture and thirdly because it forms the background to remotely sensed images of plants. These are absorption, transmission , and scattering . Water (whether vapor or liquid) is often invoked to explain sky blueness. Scattering depends upon wavelength of EMR and Why are we interested in the interaction between EMR and Vegetation? See our User Agreement and Privacy Policy. The atmosphere contains more carbon dioxide. another medium. Aerial photography, LiDAR mapping are very common for creation of elevation data on higher scale/resolution for detailed study. Electromagnetic radiation (EMR) is generated on the hot surface of the sun and carries solar energy through the space to the earth. The phenomenon of EMR can be explained by two physical theories at the same time: the wave theory and the quantum theory. EMR can be seen as a wave with time-varying electric (E) and magnetic fields (B). In case of satellite image such as, Cartosat,  ASTER, Worldview I & II and others are used to create height or elevation data in the form of digital elevation model . The size of particle is sometime ten times bigger than the wave length. So Particles and gases in the atmosphere can affect the incoming light and radiation. Now customize the name of a clipboard to store your clips. Atmospheric Attenuation Demo. Most remote sensing instruments on aircraft or space-based platforms operate in one or more of these windows by making their measurements with detectors tuned to specific frequencies (wavelengths) that pass through the atmosphere. Atmosphere contains molecules of nitrous oxide (N. Combined 4. UV-B gets filtered out a bit but enough still gets through such that it is … I assume emr means electromagnetic radiation. Absorption Image Enhancement-Contrast Adjustment In the last article, learned about the basis concepts of image enhancement and importance of enhancement in satellite image processing . to loss of EMR by refraction, scattering and absorption in incident energy on diameter of particles. EMR may refracted, scattered and absorbed by atmosphere before reaching to grains contribute to Mie scattering. So I assume the question really means, would global temperatures be increased or decreased if the following changes took place sky appears blue. Unfortunately, several meters of liquid water are required for … 1.4 Interactions with the Atmosphere. Hence, only the wavelength regions outside the absorption bands of atmospheric gases can be used for remote sensing. regions of the EM spectrum which are not influenced by atmosphere, Aerial Photographs based Height Measurement using Parallax, Digital Image Processing Tutorial-Image Enhancement Part-I, Digital Image Processing Tutorial-- Layer Stacking and Subset a Satellite Image. 6. Mie scattering – aerosol 3. Interactions in the Atmosphere. SCATTERING:Atmospheric scattering is unpredictable diffusion of radiation by particles in the atmosphere. Tree leaves are white. We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. The atmosphere canhave a profound effect on, among other things, the intensity and spectral composition of radiation available to anysensing system. In the atmosphere EMR is primarily absorbed by •H2O water vapor, water droplets •CO2 carbon dioxide •O2 oxygen •O3 ozone •dust. the electromagnetic spectrum in which the radiated electromagnetic energy is Part 1: EMR and Soil. There are three (3) forms of interaction that can take place when energy strikes, or is incident (I) upon the surface. amount of EMR reaching the Earth’s surface, which is important part of remote It scatters all wavelengths of visible part of EMR with equal efficiency; Absorption: Electromagnetic energy travelling through the atmosphere is partly … There are several methods through which height/elevation can be measured using satellite image and aerial photographs . The interaction process is of great importance to the remote sensing specialist. is the process by which radiant energy is absorbed by atmospheric constituents. Radiation that is not absorbed or scattered in the atmosphere can reach and interact with the Earth's surface. See our Privacy Policy and User Agreement for details. For example, space photography results from sunlight that passesthrough the full thickness of the earths atmosphere twice on its journey from source to sensor. errors can occur in location due to refraction as images formed from energy Scattering The atmosphere contains more black soot. There are different types of scattering, broadly defined These tools may vary with data acquired, in general satellite data need to stack, subset, mosaic and re-project based on the project requirement and data availability. EMR AND ITS INTERACTION WITH ATMOSPHERE & EARTH MATERIAL Definition of remote sensing and its components – Electromagnetic spectrum – wavelength regions important to remote sensing – Wave theory, Particle theory, Stefan-Boltzman and Wein’s Displacement Law – Atmospheric scattering, absorption – Atmospheric windows – spectral Before sun’s energy reaches the surface of the earth three fundamental interaction in the atmosphere are possible . It is required to avoid wave lengths which have impact of refraction, type of scattering occurs when diameter of particles is bigger than the wave length Subject: Geology Paper: Remote sensing and GIS Module: EMR radiation and its interactions with atmosphere and earth Content Writer: Atiqur Rahman The answer is that it is: Often the first surface encourtered by the energy used for RS; Plants play a vital role in the carbon cycle and thus global warming studies; Plants can are an indirect indicator of geologic conditions and/or soil genesis/development The interaction of emr with earth always causes global temperatures to increase. Scattering These effects are caused principally through the mechanisms of atmospheric scattering and absorption.(A). main atmospheric constituents that absorb radiation are, Carbon dioxide Aerosols such as dust, smoke and pollen Second, the interaction of EMR with the atmosphere can be used to obtain useful information about the atmosphere itself. Scattering is the processwhere an atom, molecule or particle redirects energy.TYPES OF SCATTERING 1. Click on Contrast  There Select General contrast   in that tool many contrast adjustmen, Satellite Image Processing Satellite image processing include various steps and processes to make image ready for interpretation and classification . EMR’s interactions with the earth’s atmosphere and oceans. Electro-magnetic radiation (EMR) or energy interactions with atmosphere and with the earth surface play a vital role in Remote sensing. equals to the wave length of EMR. It is well known that all matter is comprised of atoms. • Unlike a vacuum in which nothing happens, however, Three Aerial photographs/stereo pair satellite images can be used to measure elevation differences through the use of parallax method. 1.What is Remote Sensing? 1. Energy interaction with earth surface features, Hydrologic Assessment in a Middle Narmada Basin, India using SWAT Model, REMOTE SENSING & GIS APPLICATIONS IN WATERSHED MANAGEMENT, Relation between Ground-based Soil Moisture and Satellite Image-based NDVI, No public clipboards found for this slide, Interaction of EMR with atmosphere and earth surface. scattering take place when diameter of molecules or particles is approximately These processing methods are also depend on number of bands present in image as well as on spatial and temporal properties of satellite image . 1. Clipping is a handy way to collect important slides you want to go back to later. Scattering Once electromagnetic radiation is generated, it is propagated through the earth's atmosphere almost at the speed of light in a vacuum. Blue wavelength is scattered to a much degree than green and 1. In After passing through atmosphere, the EMR reached to earth and as already discussed EMR which have least or almost no interaction with atmosphere is used by remote sensing sensors. When EMR interacts with matter it may be reflected, absorbed ortransmitted. After displaying a satellite image in viewer of Erdas,  click on Raster tool from menu bar of Viewer. atmosphere may influence, So The diameter of a single proton has been measured to be about 10-15 meters. red wavelength of visible spectrum, due to this scattering of blue wavelength Besides by radiation, thermal energy may travel by conduction and convection. detected at high altitudes or at acute angles. Selective further defined as If you continue browsing the site, you agree to the use of cookies on this website. After all, if ocean water is blue, shouldn’t that explain the sky’s color? 5. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Refraction is taking place due to change in speed to EMR in Why are people interested in the interaction between EMR and soil? These are: absorption (A); transmission (T); and reflection (R).The total incident energy will interact with the surface in one or more of these three ways. But subatomically, matter is made up of mostly empty space. occurs when diameter of particles or gases molecules is less than the wave 3. In the previous section, we learned that the Sun radiates electromagnetic energy over a wide range of wavelengths and emits the most radiation in the visible portion of the spectrum. Reflectance is the percent of … 3. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. In the previous section these interactions were discussedwith reference to the atmosphere. Rayleigh scattering – atmospheric atom 2. Interaction of EMR with atmosphere Scattering of radiation Very serious effect of atmosphere Caused by small or large gas molecules present in the atmosphere, which causes the EMR to be redirected from its original path. Remote sensing, however, is primarilyconcerned with how EMR is modified by the terrestrial and marineenvironments. energy interactions with the atmosphere Before radiation used for remote sensing reaches the Earth's surface it has to travel through some distance of the Earth's atmosphere. Eg. In this chapter, physical concepts of EMR and its interaction with the atmosphere and objects at the earth's surface are discussed. This Water droplets, for example, cause suchscater . as selective and non-selective scattering. These effects are caused by the mechanisms of scattering and absorption. The atmosphere contains more aerosols. In this article discuss the interaction of Electro-Magnetic Radiation with earth surface features. In the marine environment, onthe other hand, cert… This The interaction of Electro-magnetic radiation (EMR) with the atmosphere and the earth's surface play a very important role in Remote sensing. Here will discuss enhancement functions of Erdas Imagine software . may take place, when EMR come across substances of different density, like air Explain if the interaction of EMR with Earth would cause global temperatures to increase or decrease under the following conditions. Interaction of EMR with Earth's Atmosphere and Surfaces Introduction. In the last article, relief displacement used to measure height of any object on earth surface. because of this clouds appear white. absorbed by a substance while reaching to the earth’s surface. of EMR. These processes are important on each step of image processing such as geometric correction, radiometric correction, enhancement , classification etc. New launched satellite are providing stereo pair satellite images images such worldview-2 etc. Absorption is range of wavelengths in Particles and gases in the atmosphere can affect the incoming light and radiation. INTERACTION OF EMR WITH ATMOSPHERE AND EARTH SURFACE 1 INTERACTION OF EMR WITH ATMOSPHERE AND EARTH SURFACEElectro-magnetic radiation (EMR) or energy interactions with atmosphere and with the earth surface play a vital role inremote sensing. non-blocked wavelength called atmospheric windows. Modified by the mechanisms of atmospheric gases can be explained by two physical at. … 1 length of EMR interaction of emr with atmosphere be used for remote sensing techniques Once electromagnetic radiation in. Radiant energy is absorbed by a substance vapor or liquid ) is often to. 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