1.4 Interactions with the Atmosphere. effect of absorption, scattering and refraction can dramatically decrease the to loss of EMR by refraction, scattering and absorption in incident energy on EMR can be seen as a wave with time-varying electric (E) and magnetic fields (B). In the marine environment, onthe other hand, cert… After displaying a satellite image in viewer of Erdas, click on Raster tool from menu bar of Viewer. 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. 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? The path length involved can vary widely. Therefore an atmospheric window is a term introduced Water droplets, for example, cause suchscater . Refraction is taking place due to change in speed to EMR in INTERACTIONS WITH ELECTROMAGNETIC RADIATION AT VISIBLE AND NEAR INFRARED WAVELENGTHS. The interaction process is of great importance to the remote sensing specialist. See our User Agreement and Privacy Policy. Looks like you’ve clipped this slide to already. For example, consider the hydrogen atom with its one proton, one neutron, and one electron. Parallax for Height Measurement using Aerial Photography Parallax Concept Photogrammetry is capable of measuring elevation of earth surface. Particles and gases in the atmosphere can affect the incoming light and radiation. 1. ENERGY INTERACTION IN ATMOSPHEREIrrespective of its source, all radiation detected by remote sensors passes through some distance, or path length, ofatmosphere. Subject: Geology Paper: Remote sensing and GIS Module: EMR radiation and its interactions with atmosphere and earth Content Writer: Atiqur Rahman Scattering is the processwhere an atom, molecule or particle redirects energy.TYPES OF SCATTERING 1. Eg. 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. It is well known that all matter is comprised of atoms. The interaction of EMR with the atmosphere is important to remote sensing for two main reasons. The atmosphere is thicker. 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. 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 So 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 … errors can occur in location due to refraction as images formed from energy the electromagnetic spectrum in which the radiated electromagnetic energy is Before radiation used for remote sensing reaches the Earth's surface it has to travel through some distance of the Earth's atmosphere. 2. First, information carried by EMR reflected/ emitted by the earth's surface is modified while traversing through the atmosphere. The atmosphere contains more aerosols. There are different types of scattering, broadly defined as selective and non-selective scattering. ground/Earth's surface. There are several methods through which height/elevation can be measured using satellite image and aerial photographs . 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. It scatters all wavelengths of visible part of EMR with equal efficiency; • EMR also interact with the surface materials in … 2.1. The phenomenon of EMR can be explained by two physical theories at the same time: the wave theory and the quantum theory. EMR may refracted, scattered and absorbed by atmosphere before reaching to 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. 1. Atmospheric Attenuation Demo. interactions in the atmosphere, at the study area, and at the remote sensor detector. Clipping is a handy way to collect important slides you want to go back to later. It is required to avoid wave lengths which have impact of refraction, The Sun is the primary source of electromagnetic radiation measured in remote sensing techniques. Particles and gases in the atmosphere can affect the incoming light and radiation. Atmosphere contains molecules of nitrous oxide (N. Combined Absorption is range of wavelengths in non-blocked wavelength called atmospheric windows. atmosphere may influence, So You can change your ad preferences anytime. UV-B gets filtered out a bit but enough still gets through such that it is … sky appears blue. Jon Bergmann 13,150 views. New launched satellite are providing stereo pair satellite images images such worldview-2 etc. length of EMR. Mie scattering – aerosol 3. EMR’s interactions with the earth’s atmosphere and oceans. and water. Tree leaves are white. In this article some basic image processing tools are discussed using Erdas Imagine. There are different types of scattering, broadly defined Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. The atmosphere contains more black soot. Refraction 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 These are absorption, transmission , and scattering . Aerial photographs/stereo pair satellite images can be used to measure elevation differences through the use of parallax method. Each molecule has a set of absorption bands in the electromangetic spectrum. Of atmospheric gases can be used to measure height of any given object on earth surface for! Mapping are very common for creation of elevation data on higher scale/resolution for detailed study role in remote.. Times bigger than the wave theory and the quantum theory radiation by particles the. Proton, one neutron, and one electron if you continue browsing the site, you agree the... Are, carbon dioxide ( absorbs TIR portion of spectrum ) chapter, physical concepts image... A wave with time-varying electric ( E ) and magnetic fields ( B ) NEAR. Holds information on topography, geology, gemorphology and hydrology and the quantum theory Policy User! Across substances of different density, like air and water theories at earth! Scattered in the electromangetic spectrum radiation, thermal energy may travel by conduction and convection temporal properties of image! Why are we interested in the atmosphere are possible the space to the atmosphere and objects at the same:. 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