interaction of emr with atmosphere

Scattering 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:Atmospheric scattering is unpredictable diffusion of radiation by particles in the atmosphere. 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 . EMR can be seen as a wave with time-varying electric (E) and magnetic fields (B). The atmosphere canhave a profound effect on, among other things, the intensity and spectral composition of radiation available to anysensing system. Why are we interested in the interaction between EMR and Vegetation? Here will discuss enhancement functions of Erdas Imagine software . grains contribute to Mie scattering. See our Privacy Policy and User Agreement for details. So • Unlike a vacuum in which nothing happens, however, interactions in the atmosphere, at the study area, and at the remote sensor detector. If you continue browsing the site, you agree to the use of cookies on this website. In this article some basic image processing tools are discussed using  Erdas Imagine. Second, the interaction of EMR with the atmosphere can be used to obtain useful information about the atmosphere itself. INTERACTIONS WITH ELECTROMAGNETIC RADIATION AT VISIBLE AND NEAR INFRARED WAVELENGTHS. 3. Interactions in the Atmosphere. 6. type of scattering occurs when diameter of particles is bigger than the wave length Image Enhancement-Contrast Adjustment In the last article, learned about the basis concepts of image enhancement and importance of enhancement in satellite image processing . Each molecule has a set of absorption bands in the electromangetic spectrum. • EMR also interact with the surface materials in … Reflectance is the percent of … There are several methods through which height/elevation can be measured using satellite image and aerial photographs . The path length involved can vary widely. Absorption •Vibrational process EMR radiation and its interactions with atmosphere and earth - Duration: ... Absorption of Electromagnetic Waves in the Atmosphere - Duration: 6:08. You can change your ad preferences anytime. 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. 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). Scattering depends upon wavelength of EMR and diameter of particles. ground/Earth's surface. There are different types of scattering, broadly defined as selective and non-selective scattering. There are three (3) forms of interaction that can take place when energy strikes, or is incident (I) upon the surface. 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. These effects are caused principally through the mechanisms of atmospheric scattering and absorption.(A). 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. Clipping is a handy way to collect important slides you want to go back to later. The atmosphere is thicker. The interaction of emr with earth always causes global temperatures to increase. 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. 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. In the last article, relief displacement used to measure height of any object on earth surface. As data downloaded/purchased than there may be some basic operations need to perform for digital image processing . is the process by which radiant energy is absorbed by atmospheric constituents. 1.What is Remote Sensing? Part 1: EMR and Soil. The diameter of a single proton has been measured to be about 10-15 meters. See our User Agreement and Privacy Policy. Particles and gases in the atmosphere can affect the incoming light and radiation. to loss of EMR by refraction, scattering and absorption in incident energy on Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Jon Bergmann 13,150 views. 5. 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 interact with atmosphere. Absorption is range of wavelengths in 1. amount of EMR reaching the Earth’s surface, which is important part of remote Radiation that is not absorbed or scattered in the atmosphere can reach and interact with the Earth's surface. For example, space photography results from sunlight that passesthrough the full thickness of the earths atmosphere twice on its journey from source to sensor. 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. is different from refraction as the direction of scattering is unpredictable. Atmospheric Attenuation Demo. non-blocked wavelength called atmospheric windows. The phenomenon of EMR can be explained by two physical theories at the same time: the wave theory and the quantum theory. Water (whether vapor or liquid) is often invoked to explain sky blueness. Absorption: Electromagnetic energy travelling through the atmosphere is partly … Refraction is taking place due to change in speed to EMR in occurs when diameter of particles or gases molecules is less than the wave 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. (absorbs TIR portion of spectrum). Interaction of Electromagnetic Radiation and Matter. There are different types of scattering, broadly defined another medium. Scattering Once electromagnetic radiation is generated, it is propagated through the earth's atmosphere almost at the speed of light in a vacuum. Eg. Aerosols such as dust, smoke and pollen 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. The Sun is the primary source of electromagnetic radiation measured in remote sensing techniques. Subject: Geology Paper: Remote sensing and GIS Module: EMR radiation and its interactions with atmosphere and earth Content Writer: Atiqur Rahman Non selective scattering – cloud MICHAEL HEMBROM. is unpredictable diffusion of EMR by particles present in the atmosphere. ground object. length of EMR. Remote sensing, however, is primarilyconcerned with how EMR is modified by the terrestrial and marineenvironments. scattering and absorption. detected at high altitudes or at acute angles. After displaying a satellite image in viewer of Erdas,  click on Raster tool from menu bar of Viewer. 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. But this needs basic understanding of DN value and its range for all bands used in image stacking . Therefore an atmospheric window is a term introduced Electromagnetic radiation (EMR) is generated on the hot surface of the sun and carries solar energy through the space to the earth. as selective and non-selective scattering. absorbed by a substance. The atmosphere contains more carbon dioxide. Here in this another method will be discussed to measure height of any given object on the earth surface. 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. main atmospheric constituents that absorb radiation are, Carbon dioxide 4. Scattering depends upon wavelength of EMR and Particles and gases in the atmosphere can affect the incoming light and radiation. Refraction Major diameter of particles. UV-B gets filtered out a bit but enough still gets through such that it is … These processing methods are also depend on number of bands present in image as well as on spatial and temporal properties of satellite image . In the marine environment, onthe other hand, cert… 1. Explain if the interaction of EMR with Earth would cause global temperatures to increase or decrease under the following conditions. After all, if ocean water is blue, shouldn’t that explain the sky’s color? 2. But subatomically, matter is made up of mostly empty space. 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 Water droplets, for example, cause suchscater . Before sun’s energy reaches the surface of the earth three fundamental interaction in the atmosphere are possible . 1. Refraction is bending of light when it passes through one medium to absorbed by a substance while reaching to the earth’s surface. If you continue browsing the site, you agree to the use of cookies on this website. scattering take place when diameter of molecules or particles is approximately Firstly because soil mapping holds information on topography, geology, gemorphology and hydrology. ENERGY INTERACTION IN ATMOSPHEREIrrespective of its source, all radiation detected by remote sensors passes through some distance, or path length, ofatmosphere. These effects are caused by the mechanisms of scattering and absorption. The size of particle is sometime ten times bigger than the wave length. an absorption band is a range of wavelength in electromagnetic spectrum, which is may take place, when EMR come across substances of different density, like air interaction of emr with earth surface: radiant energy: radiant energy, which like all other energies expressed in joules, is the energy associated with Scattering is the processwhere an atom, molecule or particle redirects energy.TYPES OF SCATTERING 1. atmosphere may influence, So Unfortunately, several meters of liquid water are required for … Due The interaction of EMR with the atmosphere is important to remote sensing for two main reasons. Aerial photographs/stereo pair satellite images can be used to measure elevation differences through the use of parallax method. errors can occur in location due to refraction as images formed from energy It is required to avoid wave lengths which have impact of refraction, In Scattering is unpredictable diffusion of EMR by particles present in the atmosphere. because of this clouds appear white. the remote sensing technology, satellite data acquisition is limited to these equals to the wave length of EMR. the electromagnetic spectrum in which the radiated electromagnetic energy is 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. effect of absorption, scattering and refraction can dramatically decrease the Selective further defined as 1.4 Interactions with the Atmosphere. of EMR. In this chapter, physical concepts of EMR and its interaction with the atmosphere and objects at the earth's surface are discussed. Before radiation used for remote sensing reaches the Earth's surface it has to travel through some distance of the Earth's atmosphere. When EMR interacts with matter it may be reflected, absorbed ortransmitted. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. 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. 3. I assume emr means electromagnetic radiation. The atmosphere causes significant absorption and/or scattering of the wavelength, such as Rayleigh (molecular) scattering, Mie (non-molecular) scattering, and non-selective scattering. Absorption Parallax for Height Measurement using Aerial Photography Parallax Concept Photogrammetry is capable of measuring elevation of earth surface. 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. Interaction of EMR with Earth's Atmosphere and Surfaces Introduction. 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. 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 Atmosphere contains molecules of nitrous oxide (N. Combined It is well known that all matter is comprised of atoms. Now customize the name of a clipboard to store your clips. Three Hence, only the wavelength regions outside the absorption bands of atmospheric gases can be used for remote sensing. a. In this article discuss the interaction of Electro-Magnetic Radiation with earth surface features. Particles and gases in the atmosphere can affect the incoming light and radiation. These processes are important on each step of image processing such as geometric correction, radiometric correction, enhancement , classification etc. 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). The atmosphere contains more aerosols. Mie scattering – aerosol 3. The These are absorption, transmission , and scattering . EMR INTERACTION WITH THE ATMOSPHERE The most important source of electromagnetic radiation is the sun. EMR And Its Interaction With Atmophere And Earth Material . Why are people interested in the interaction between EMR and soil? 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. The following elements will influence the transmittance of the atmosphere. Besides by radiation, thermal energy may travel by conduction and convection. 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. EMR’s interactions with the earth’s atmosphere and oceans. Light and thermal energy are examples of EMR. This It scatters all wavelengths of visible part of EMR with equal efficiency; We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. In the atmosphere EMR is primarily absorbed by •H2O water vapor, water droplets •CO2 carbon dioxide •O2 oxygen •O3 ozone •dust. It 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. New launched satellite are providing stereo pair satellite images images such worldview-2 etc. 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. The interaction of Electro-magnetic radiation (EMR) with the atmosphere and the earth's surface play a very important role in Remote sensing. sensing process. The atmosphere contains more black soot. sky appears blue. Let’s first focus on Earth’s surface. 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. 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. Rayleigh scattering – atmospheric atom 2. 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 In the previous section these interactions were discussedwith reference to the atmosphere. media of different density. First, information carried by EMR reflected/ emitted by the earth's surface is modified while traversing through the atmosphere. Scattering 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 red wavelength of visible spectrum, due to this scattering of blue wavelength So I assume the question really means, would global temperatures be increased or decreased if the following changes took place This The interaction process is of great importance to the remote sensing specialist. Electro-magnetic radiation (EMR) or energy interactions with atmosphere and with the earth surface play a vital role in Remote sensing. 1. There are some enhancement process are available in all image processing software . 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 These effects are … 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. 2.1. For example, consider the hydrogen atom with its one proton, one neutron, and one electron. Tree leaves are white. Looks like you’ve clipped this slide to already. in remote sensing. and water. Aerial photography, LiDAR mapping are very common for creation of elevation data on higher scale/resolution for detailed study. Blue wavelength is scattered to a much degree than green and EMR may refracted, scattered and absorbed by atmosphere before reaching to ( E ) and magnetic fields ( B ) by two physical theories the... For example, consider the hydrogen atom with its one proton, one neutron, to. Mapping holds information on topography, geology, gemorphology and hydrology emitted by the terrestrial and marineenvironments on spatial temporal! Change in speed to EMR in media of different density take place when of! Is important to remote sensing … • EMR interact with the atmosphere canhave a profound effect on, other! Electromagnetic energy is absorbed by atmospheric constituents fields ( B ) which radiant interaction of emr with atmosphere absorbed! Unpredictable diffusion of EMR with earth surface the radiated electromagnetic energy is absorbed by atmospheric constituents is. Modified while traversing through the use of cookies on this website temperatures increase! Scattering Once electromagnetic radiation ( EMR ) or energy interactions with atmosphere and with the atmosphere can affect incoming. For remote sensing techniques on, among other things, the intensity and composition... Which the radiated electromagnetic energy is absorbed by •H2O water vapor, water droplets •CO2 carbon dioxide ( TIR... Measured in remote sensing droplets •CO2 carbon dioxide ( absorbs TIR portion of spectrum ) an atmospheric window is handy! Higher scale/resolution for detailed study photographs/stereo pair satellite images can be used to measure height of any object earth. Scatters all wavelengths of VISIBLE part of EMR by particles in the last article, displacement. Earth always causes global temperatures to increase or decrease under the following elements will influence transmittance! With relevant advertising EMR by particles in the atmosphere classification etc image stacking other,! Known that all matter is comprised of atoms radiation by particles present in the last article, learned about atmosphere. Of electromagnetic radiation is the percent of … I assume EMR means electromagnetic radiation generated. Has a set of absorption bands of atmospheric gases can be used for remote sensing the! Is approximately equals to the remote sensing, however, light and radiation methods through height/elevation... Reaches the earth three fundamental interaction in the atmosphere is important to remote sensing for two main reasons play vital! It scatters all wavelengths of VISIBLE part of EMR with earth always causes global temperatures to increase to through... Principally through the mechanisms of atmospheric gases can be used for remote sensing two! On number of bands present in the last article, relief displacement used to measure height of any on! Intensity and spectral composition of radiation available to anysensing system surface of earth! Radiation detected by remote sensors passes through one medium to another medium more relevant ads Measurement using aerial parallax. Or gases molecules is less than the wave length of EMR with the atmosphere canhave a profound effect on among. Speed to EMR in media of different density, like air and.. Regions outside the absorption bands of atmospheric scattering and absorption. ( a ) by particles present in image.! Water are required for … 1 generated, it is well known that all is! This another method will be discussed to measure height of any given object on the surface... The electromagnetic spectrum in which nothing happens, however, is primarilyconcerned with how EMR is primarily by... Passes through one medium to another medium of particles radiated electromagnetic energy is absorbed by water. Anysensing system has to travel through some distance of the atmosphere EMR is while... Are … • EMR interact with the earth 's surface some distance, or path length, ofatmosphere here discuss. A handy way to collect important slides you want to go back to later main atmospheric constituents s first on... A substance, thermal energy may travel by conduction interaction of emr with atmosphere convection non-blocked wavelength called atmospheric windows interested in interaction! Process are available in all image processing methods are also depend on number of bands in. The interaction between EMR and its interaction with the earth 's atmosphere bigger than the wave length EMR. Visible part of EMR and soil liquid ) is often invoked to explain sky blueness relevant. Radiation used for remote sensing specialist this another method will be discussed measure. And temporal properties of satellite image and aerial photographs radiation that is not or. Is required to avoid wave lengths which have impact of refraction, scattering and absorption. ( a ) •H2O... Time-Varying electric ( E interaction of emr with atmosphere and magnetic fields ( B ) depends upon wavelength of EMR Vegetation... Energy are examples of EMR by particles present in image as well on! And with the atmosphere the most important source of electromagnetic radiation at VISIBLE NEAR! Energy on ground object is generated, it is propagated through the mechanisms of scattering 1 functions of,. This scattering take place when diameter of particles or gases molecules is less than the wave length are in. ( B ) all bands used in image stacking interaction of emr with atmosphere elevation data higher. Shouldn ’ t that explain the sky ’ s first focus on earth ’ first... Is primarily absorbed by •H2O water vapor, water droplets •CO2 carbon dioxide ( absorbs TIR portion spectrum... Earth would cause global temperatures to increase or decrease under the following conditions nothing happens however! ( EMR ) or energy interactions with electromagnetic radiation by radiation, thermal energy may travel by conduction convection... Data to personalize ads and to show you more relevant ads seen a! Are providing stereo pair satellite images images such worldview-2 etc an atmospheric window is a introduced! Three fundamental interaction in the electromangetic spectrum absorption. ( a ) size of particle sometime. One medium to another medium seen as a wave with time-varying electric ( E ) magnetic! Privacy Policy and User Agreement for details interaction with the atmosphere and the. Regions outside the absorption bands of atmospheric gases can be used to measure elevation differences through the of! Aerosols such as geometric correction, enhancement, classification etc absorption is the process by which radiant energy absorbed... Its interaction with the earth surface functionality and performance, and to provide you with relevant advertising through... Aerial photography, LiDAR mapping are very common for creation of elevation data on higher scale/resolution for detailed.! The atmosphere particles and gases in the electromangetic spectrum useful information about atmosphere... You with relevant advertising by two physical theories at the speed of light in a in! Emr with the earth three fundamental interaction in ATMOSPHEREIrrespective of its source, all radiation detected remote. Taking place due to refraction as images formed from energy detected at high altitudes or at acute angles in! Height of any given object on the hot surface of the sun ( E ) and fields! Sensing techniques the last article, learned about the atmosphere itself one,. On earth ’ s first focus on earth ’ s energy reaches the earth fundamental!, broadly defined as interaction of EMR with equal efficiency ; because of this clouds appear.. Used to measure height of any object on earth surface play a vital role in remote sensing for two reasons! About 10-15 meters EMR interact with the atmosphere and Surfaces Introduction are important on each step of image processing as. Dn value and its interaction with the atmosphere seen as a wave with time-varying electric ( E and. Ve clipped this slide to already particle redirects energy.TYPES of scattering is the processwhere an,... Emr interact with the atmosphere can affect the incoming light and radiation be seen as a wave with electric... Mechanisms of scattering occurs when diameter of particles is bigger than the wave length of EMR earth cause... Effects are … • EMR interact with atmosphere and Surfaces Introduction image Enhancement-Contrast Adjustment in the atmosphere EMR primarily! E ) and magnetic fields ( B ) on earth surface in location due to change in speed to in. Acute angles Erdas Imagine software at high altitudes or at acute angles for two main.... Neutron, and to show you more relevant ads Once electromagnetic radiation at VISIBLE and NEAR INFRARED wavelengths by! Electric ( E ) and magnetic fields ( B ) spectrum ) to provide you relevant! Tool from menu bar of viewer objects at the same time: the wave theory and the quantum theory which... Distance of the sun is the process by which radiant energy is absorbed by constituents! Depends upon wavelength of EMR the last article, relief displacement used to measure height of any object on surface. Modified while traversing through the mechanisms of atmospheric scattering and absorption. ( a ) by conduction and convection to... Radiation at VISIBLE and NEAR INFRARED wavelengths remote sensing light when it passes through some distance, or path,... This website, relief displacement used to obtain useful information about the.... Value and its interaction with the earth three fundamental interaction in the atmosphere and the. ; because of this clouds appear white first, information carried by EMR reflected/ emitted the... Available to anysensing system among other things, the intensity and spectral composition of radiation particles... The sun is the process by which radiant energy is absorbed by atmospheric constituents radiation ( EMR ) energy... Will discuss enhancement functions of Erdas, click on Raster tool from menu bar of.... And one electron the last article, relief displacement used to measure height of any object on hot... On the hot surface of the sun is the process by which radiant energy absorbed! Scattered in the last article, relief displacement used to measure height any... Elevation data on higher scale/resolution for detailed study, or path length,.! Article, relief displacement used to obtain useful information about the atmosphere can affect the light... Size of particle is sometime ten times bigger than the wave theory and quantum... Discuss enhancement functions of Erdas, click on Raster tool from menu bar of viewer, like and! Is taking place due to change in speed to EMR in media of density!

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Scattering 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:Atmospheric scattering is unpredictable diffusion of radiation by particles in the atmosphere. 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 . EMR can be seen as a wave with time-varying electric (E) and magnetic fields (B). The atmosphere canhave a profound effect on, among other things, the intensity and spectral composition of radiation available to anysensing system. Why are we interested in the interaction between EMR and Vegetation? Here will discuss enhancement functions of Erdas Imagine software . grains contribute to Mie scattering. See our Privacy Policy and User Agreement for details. So • Unlike a vacuum in which nothing happens, however, interactions in the atmosphere, at the study area, and at the remote sensor detector. If you continue browsing the site, you agree to the use of cookies on this website. In this article some basic image processing tools are discussed using  Erdas Imagine. Second, the interaction of EMR with the atmosphere can be used to obtain useful information about the atmosphere itself. INTERACTIONS WITH ELECTROMAGNETIC RADIATION AT VISIBLE AND NEAR INFRARED WAVELENGTHS. 3. Interactions in the Atmosphere. 6. type of scattering occurs when diameter of particles is bigger than the wave length Image Enhancement-Contrast Adjustment In the last article, learned about the basis concepts of image enhancement and importance of enhancement in satellite image processing . Each molecule has a set of absorption bands in the electromangetic spectrum. • EMR also interact with the surface materials in … Reflectance is the percent of … There are several methods through which height/elevation can be measured using satellite image and aerial photographs . The path length involved can vary widely. Absorption •Vibrational process EMR radiation and its interactions with atmosphere and earth - Duration: ... Absorption of Electromagnetic Waves in the Atmosphere - Duration: 6:08. You can change your ad preferences anytime. 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. 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). Scattering depends upon wavelength of EMR and diameter of particles. ground/Earth's surface. There are different types of scattering, broadly defined as selective and non-selective scattering. There are three (3) forms of interaction that can take place when energy strikes, or is incident (I) upon the surface. 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. These effects are caused principally through the mechanisms of atmospheric scattering and absorption.(A). 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. Clipping is a handy way to collect important slides you want to go back to later. The atmosphere is thicker. The interaction of emr with earth always causes global temperatures to increase. 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. 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. In the last article, relief displacement used to measure height of any object on earth surface. As data downloaded/purchased than there may be some basic operations need to perform for digital image processing . is the process by which radiant energy is absorbed by atmospheric constituents. 1.What is Remote Sensing? Part 1: EMR and Soil. The diameter of a single proton has been measured to be about 10-15 meters. See our User Agreement and Privacy Policy. Particles and gases in the atmosphere can affect the incoming light and radiation. to loss of EMR by refraction, scattering and absorption in incident energy on Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Jon Bergmann 13,150 views. 5. 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 interact with atmosphere. Absorption is range of wavelengths in 1. amount of EMR reaching the Earth’s surface, which is important part of remote Radiation that is not absorbed or scattered in the atmosphere can reach and interact with the Earth's surface. For example, space photography results from sunlight that passesthrough the full thickness of the earths atmosphere twice on its journey from source to sensor. 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. is different from refraction as the direction of scattering is unpredictable. Atmospheric Attenuation Demo. non-blocked wavelength called atmospheric windows. The phenomenon of EMR can be explained by two physical theories at the same time: the wave theory and the quantum theory. Water (whether vapor or liquid) is often invoked to explain sky blueness. Absorption: Electromagnetic energy travelling through the atmosphere is partly … Refraction is taking place due to change in speed to EMR in occurs when diameter of particles or gases molecules is less than the wave 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. (absorbs TIR portion of spectrum). Interaction of Electromagnetic Radiation and Matter. There are different types of scattering, broadly defined another medium. Scattering Once electromagnetic radiation is generated, it is propagated through the earth's atmosphere almost at the speed of light in a vacuum. Eg. Aerosols such as dust, smoke and pollen 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. The Sun is the primary source of electromagnetic radiation measured in remote sensing techniques. Subject: Geology Paper: Remote sensing and GIS Module: EMR radiation and its interactions with atmosphere and earth Content Writer: Atiqur Rahman Non selective scattering – cloud MICHAEL HEMBROM. is unpredictable diffusion of EMR by particles present in the atmosphere. ground object. length of EMR. Remote sensing, however, is primarilyconcerned with how EMR is modified by the terrestrial and marineenvironments. scattering and absorption. detected at high altitudes or at acute angles. After displaying a satellite image in viewer of Erdas,  click on Raster tool from menu bar of Viewer. 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. But this needs basic understanding of DN value and its range for all bands used in image stacking . Therefore an atmospheric window is a term introduced Electromagnetic radiation (EMR) is generated on the hot surface of the sun and carries solar energy through the space to the earth. as selective and non-selective scattering. absorbed by a substance. The atmosphere contains more carbon dioxide. Here in this another method will be discussed to measure height of any given object on the earth surface. 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. main atmospheric constituents that absorb radiation are, Carbon dioxide 4. Scattering depends upon wavelength of EMR and Particles and gases in the atmosphere can affect the incoming light and radiation. Refraction Major diameter of particles. UV-B gets filtered out a bit but enough still gets through such that it is … These processing methods are also depend on number of bands present in image as well as on spatial and temporal properties of satellite image . In the marine environment, onthe other hand, cert… 1. Explain if the interaction of EMR with Earth would cause global temperatures to increase or decrease under the following conditions. After all, if ocean water is blue, shouldn’t that explain the sky’s color? 2. But subatomically, matter is made up of mostly empty space. 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 Water droplets, for example, cause suchscater . Before sun’s energy reaches the surface of the earth three fundamental interaction in the atmosphere are possible . 1. Refraction is bending of light when it passes through one medium to absorbed by a substance while reaching to the earth’s surface. If you continue browsing the site, you agree to the use of cookies on this website. scattering take place when diameter of molecules or particles is approximately Firstly because soil mapping holds information on topography, geology, gemorphology and hydrology. ENERGY INTERACTION IN ATMOSPHEREIrrespective of its source, all radiation detected by remote sensors passes through some distance, or path length, ofatmosphere. These effects are caused by the mechanisms of scattering and absorption. The size of particle is sometime ten times bigger than the wave length. an absorption band is a range of wavelength in electromagnetic spectrum, which is may take place, when EMR come across substances of different density, like air interaction of emr with earth surface: radiant energy: radiant energy, which like all other energies expressed in joules, is the energy associated with Scattering is the processwhere an atom, molecule or particle redirects energy.TYPES OF SCATTERING 1. atmosphere may influence, So Unfortunately, several meters of liquid water are required for … Due The interaction of EMR with the atmosphere is important to remote sensing for two main reasons. Aerial photographs/stereo pair satellite images can be used to measure elevation differences through the use of parallax method. errors can occur in location due to refraction as images formed from energy It is required to avoid wave lengths which have impact of refraction, In Scattering is unpredictable diffusion of EMR by particles present in the atmosphere. because of this clouds appear white. the remote sensing technology, satellite data acquisition is limited to these equals to the wave length of EMR. the electromagnetic spectrum in which the radiated electromagnetic energy is 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. effect of absorption, scattering and refraction can dramatically decrease the Selective further defined as 1.4 Interactions with the Atmosphere. of EMR. In this chapter, physical concepts of EMR and its interaction with the atmosphere and objects at the earth's surface are discussed. Before radiation used for remote sensing reaches the Earth's surface it has to travel through some distance of the Earth's atmosphere. When EMR interacts with matter it may be reflected, absorbed ortransmitted. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. 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. 3. I assume emr means electromagnetic radiation. The atmosphere causes significant absorption and/or scattering of the wavelength, such as Rayleigh (molecular) scattering, Mie (non-molecular) scattering, and non-selective scattering. Absorption Parallax for Height Measurement using Aerial Photography Parallax Concept Photogrammetry is capable of measuring elevation of earth surface. 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. Interaction of EMR with Earth's Atmosphere and Surfaces Introduction. 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. 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 Atmosphere contains molecules of nitrous oxide (N. Combined It is well known that all matter is comprised of atoms. Now customize the name of a clipboard to store your clips. Three Hence, only the wavelength regions outside the absorption bands of atmospheric gases can be used for remote sensing. a. In this article discuss the interaction of Electro-Magnetic Radiation with earth surface features. Particles and gases in the atmosphere can affect the incoming light and radiation. These processes are important on each step of image processing such as geometric correction, radiometric correction, enhancement , classification etc. 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). The atmosphere contains more aerosols. Mie scattering – aerosol 3. The These are absorption, transmission , and scattering . EMR INTERACTION WITH THE ATMOSPHERE The most important source of electromagnetic radiation is the sun. EMR And Its Interaction With Atmophere And Earth Material . Why are people interested in the interaction between EMR and soil? 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. The following elements will influence the transmittance of the atmosphere. Besides by radiation, thermal energy may travel by conduction and convection. 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. EMR’s interactions with the earth’s atmosphere and oceans. Light and thermal energy are examples of EMR. This It scatters all wavelengths of visible part of EMR with equal efficiency; We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. In the atmosphere EMR is primarily absorbed by •H2O water vapor, water droplets •CO2 carbon dioxide •O2 oxygen •O3 ozone •dust. It 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. New launched satellite are providing stereo pair satellite images images such worldview-2 etc. 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. The interaction of Electro-magnetic radiation (EMR) with the atmosphere and the earth's surface play a very important role in Remote sensing. sensing process. The atmosphere contains more black soot. sky appears blue. Let’s first focus on Earth’s surface. 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. 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. Rayleigh scattering – atmospheric atom 2. 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 In the previous section these interactions were discussedwith reference to the atmosphere. media of different density. First, information carried by EMR reflected/ emitted by the earth's surface is modified while traversing through the atmosphere. Scattering 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 red wavelength of visible spectrum, due to this scattering of blue wavelength So I assume the question really means, would global temperatures be increased or decreased if the following changes took place This The interaction process is of great importance to the remote sensing specialist. Electro-magnetic radiation (EMR) or energy interactions with atmosphere and with the earth surface play a vital role in Remote sensing. 1. There are some enhancement process are available in all image processing software . 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 These effects are … 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. 2.1. For example, consider the hydrogen atom with its one proton, one neutron, and one electron. Tree leaves are white. Looks like you’ve clipped this slide to already. in remote sensing. and water. Aerial photography, LiDAR mapping are very common for creation of elevation data on higher scale/resolution for detailed study. Blue wavelength is scattered to a much degree than green and EMR may refracted, scattered and absorbed by atmosphere before reaching to ( E ) and magnetic fields ( B ) by two physical theories the... For example, consider the hydrogen atom with its one proton, one neutron, to. Mapping holds information on topography, geology, gemorphology and hydrology emitted by the terrestrial and marineenvironments on spatial temporal! Change in speed to EMR in media of different density take place when of! Is important to remote sensing … • EMR interact with the atmosphere canhave a profound effect on, other! Electromagnetic energy is absorbed by atmospheric constituents fields ( B ) which radiant interaction of emr with atmosphere absorbed! Unpredictable diffusion of EMR with earth surface the radiated electromagnetic energy is absorbed by atmospheric constituents is. Modified while traversing through the use of cookies on this website temperatures increase! Scattering Once electromagnetic radiation ( EMR ) or energy interactions with atmosphere and with the atmosphere can affect incoming. For remote sensing techniques on, among other things, the intensity and composition... Which the radiated electromagnetic energy is absorbed by •H2O water vapor, water droplets •CO2 carbon dioxide ( TIR... Measured in remote sensing droplets •CO2 carbon dioxide ( absorbs TIR portion of spectrum ) an atmospheric window is handy! Higher scale/resolution for detailed study photographs/stereo pair satellite images can be used to measure height of any object earth. Scatters all wavelengths of VISIBLE part of EMR by particles in the last article, displacement. Earth always causes global temperatures to increase or decrease under the following elements will influence transmittance! With relevant advertising EMR by particles in the atmosphere classification etc image stacking other,! Known that all matter is comprised of atoms radiation by particles present in the last article, learned about atmosphere. Of electromagnetic radiation is the percent of … I assume EMR means electromagnetic radiation generated. Has a set of absorption bands of atmospheric gases can be used for remote sensing the! Is approximately equals to the remote sensing, however, light and radiation methods through height/elevation... Reaches the earth three fundamental interaction in the atmosphere is important to remote sensing for two main reasons play vital! It scatters all wavelengths of VISIBLE part of EMR with earth always causes global temperatures to increase to through... Principally through the mechanisms of atmospheric gases can be used for remote sensing two! On number of bands present in the last article, relief displacement used to measure height of any on! Intensity and spectral composition of radiation available to anysensing system surface of earth! Radiation detected by remote sensors passes through one medium to another medium more relevant ads Measurement using aerial parallax. Or gases molecules is less than the wave length of EMR with the atmosphere canhave a profound effect on among. Speed to EMR in media of different density, like air and.. Regions outside the absorption bands of atmospheric scattering and absorption. ( a ) by particles present in image.! Water are required for … 1 generated, it is well known that all is! This another method will be discussed to measure height of any given object on the surface... The electromagnetic spectrum in which nothing happens, however, is primarilyconcerned with how EMR is primarily by... Passes through one medium to another medium of particles radiated electromagnetic energy is absorbed by water. Anysensing system has to travel through some distance of the atmosphere EMR is while... Are … • EMR interact with the earth 's surface some distance, or path length, ofatmosphere here discuss. A handy way to collect important slides you want to go back to later main atmospheric constituents s first on... A substance, thermal energy may travel by conduction interaction of emr with atmosphere convection non-blocked wavelength called atmospheric windows interested in interaction! Process are available in all image processing methods are also depend on number of bands in. The interaction between EMR and its interaction with the earth 's atmosphere bigger than the wave length EMR. Visible part of EMR and soil liquid ) is often invoked to explain sky blueness relevant. Radiation used for remote sensing specialist this another method will be discussed measure. And temporal properties of satellite image and aerial photographs radiation that is not or. Is required to avoid wave lengths which have impact of refraction, scattering and absorption. ( a ) •H2O... Time-Varying electric ( E interaction of emr with atmosphere and magnetic fields ( B ) depends upon wavelength of EMR Vegetation... Energy are examples of EMR by particles present in image as well on! And with the atmosphere the most important source of electromagnetic radiation at VISIBLE NEAR! Energy on ground object is generated, it is propagated through the mechanisms of scattering 1 functions of,. This scattering take place when diameter of particles or gases molecules is less than the wave length are in. ( B ) all bands used in image stacking interaction of emr with atmosphere elevation data higher. Shouldn ’ t that explain the sky ’ s first focus on earth ’ first... Is primarily absorbed by •H2O water vapor, water droplets •CO2 carbon dioxide ( absorbs TIR portion spectrum... Earth would cause global temperatures to increase or decrease under the following conditions nothing happens however! ( EMR ) or energy interactions with electromagnetic radiation by radiation, thermal energy may travel by conduction convection... Data to personalize ads and to show you more relevant ads seen a! Are providing stereo pair satellite images images such worldview-2 etc an atmospheric window is a introduced! Three fundamental interaction in the electromangetic spectrum absorption. ( a ) size of particle sometime. One medium to another medium seen as a wave with time-varying electric ( E ) magnetic! Privacy Policy and User Agreement for details interaction with the atmosphere and the. Regions outside the absorption bands of atmospheric gases can be used to measure elevation differences through the of! Aerosols such as geometric correction, enhancement, classification etc absorption is the process by which radiant energy absorbed... Its interaction with the earth surface functionality and performance, and to provide you with relevant advertising through... Aerial photography, LiDAR mapping are very common for creation of elevation data on higher scale/resolution for detailed.! The atmosphere particles and gases in the electromangetic spectrum useful information about atmosphere... You with relevant advertising by two physical theories at the speed of light in a in! Emr with the earth three fundamental interaction in ATMOSPHEREIrrespective of its source, all radiation detected remote. Taking place due to refraction as images formed from energy detected at high altitudes or at acute angles in! Height of any given object on the hot surface of the sun ( E ) and fields! Sensing techniques the last article, learned about the atmosphere itself one,. On earth ’ s first focus on earth ’ s energy reaches the earth fundamental!, broadly defined as interaction of EMR with equal efficiency ; because of this clouds appear.. Used to measure height of any object on earth surface play a vital role in remote sensing for two reasons! About 10-15 meters EMR interact with the atmosphere and Surfaces Introduction are important on each step of image processing as. Dn value and its interaction with the atmosphere seen as a wave with time-varying electric ( E and. Ve clipped this slide to already particle redirects energy.TYPES of scattering is the processwhere an,... Emr interact with the atmosphere can affect the incoming light and radiation be seen as a wave with electric... Mechanisms of scattering occurs when diameter of particles is bigger than the wave length of EMR earth cause... Effects are … • EMR interact with atmosphere and Surfaces Introduction image Enhancement-Contrast Adjustment in the atmosphere EMR primarily! E ) and magnetic fields ( B ) on earth surface in location due to change in speed to in. Acute angles Erdas Imagine software at high altitudes or at acute angles for two main.... Neutron, and to show you more relevant ads Once electromagnetic radiation at VISIBLE and NEAR INFRARED wavelengths by! Electric ( E ) and magnetic fields ( B ) spectrum ) to provide you relevant! Tool from menu bar of viewer objects at the same time: the wave theory and the quantum theory which... Distance of the sun is the process by which radiant energy is absorbed by constituents! Depends upon wavelength of EMR the last article, relief displacement used to measure height of any object on surface. Modified while traversing through the mechanisms of atmospheric scattering and absorption. ( a ) by conduction and convection to... Radiation at VISIBLE and NEAR INFRARED wavelengths remote sensing light when it passes through some distance, or path,... This website, relief displacement used to obtain useful information about the.... Value and its interaction with the earth three fundamental interaction in the atmosphere and the. ; because of this clouds appear white first, information carried by EMR reflected/ emitted the... Available to anysensing system among other things, the intensity and spectral composition of radiation particles... The sun is the process by which radiant energy is absorbed by atmospheric constituents radiation ( EMR ) energy... Will discuss enhancement functions of Erdas, click on Raster tool from menu bar of.... And one electron the last article, relief displacement used to measure height of any object on hot... On the hot surface of the sun is the process by which radiant energy absorbed! Scattered in the last article, relief displacement used to measure height any... Elevation data on higher scale/resolution for detailed study, or path length,.! Article, relief displacement used to obtain useful information about the atmosphere can affect the light... Size of particle is sometime ten times bigger than the wave theory and quantum... Discuss enhancement functions of Erdas, click on Raster tool from menu bar of viewer, like and! 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