/ProcSet 4 0 R >> • EMR is characterized by wavelength and frequency. The way the image looks depends on the source of electromagnetic radiation from the object and on the interaction of thee lectromagnetic radiation with the intervening medium. Definition: Standard for class. ��Z�O�kf�)������IV���gY�iV����YWk(N`�G�I�Q�#>)�}�Aq+�j �I���q+�j �i���5����cF�)�>jL�O�puP�� The detection of electromagnetic radiation via remote sensing has four broad compo-nents: a source of radiation, interaction with the atmosphere, interaction with the earthÕs surface, and a sensor (see Figure 1.1). While the term 'remote sensing' typically assumes the use of electromagnetic radiation, the more general definition of 'acquiring information at a distance', does not preclude other forms of energy. x���ے�����s��R"��h�Pq�$N%vbm䛽�HpIA�$W��}��[$��I�=8���J�]R�b�o��n̡�;\|���b��ⰈMQY���$7�EV���~�]|-���,^�~u\o�fjn6����/1�LL���]77�,2�o֋g����䙿Gb�R�Ql�����MK����}������;4��ʜ����캃�}��/_�>7o��nu6��dNM�]sn���nވ�h�E.A#�s�Rm⏿��w_���g��gz�ۛ�߼z� }؎����,�L?��4�"N������M�������^�v�_7��y��l}ύXa.ͩ��}w�`~f���m䇘�t7�r��u�*f��5�w���6��ۣWޝ�Yܷ�/��\��=�cz�f���y��W�c��Y7��iwD��}/Zۙ}����k��i�������L.W��|�mDV���.�Q�̺p�v��T�.ڶw��w����}��� ��?��VFM����Ս��B����L&l������,l��2�zb�8+ ��8*˼�yj�VÍ�f2_g ;����ڣ�*X6�X�c�����u�T��{$�䑑�9��� ����_T������#��P �tp���;tɣ��;�'K&��ef�Yp�t4t�΂��C>Ze�G�幌�|?�(�4YU������ug�7�m�y�����'&~9,}���v�V7�锭km��0nS��=v��羪,Ei�{X_��2�w��$��w�QV?Y߶��ݟLۭ���,>�&�bT�7�;�!W���헝^�Sٳ����\���tUO���>���n߮���>a6�����z�z�ފd\t�W��T�x���^;��g���6g���':�G�.�I憦�O�4�-E9F7[�%�86�]��F��q5t�Ji�n�ܠ�桩gE�&��ԡ��T���''ˎG65�e^�,3iY�z_���tt(u�b���D�HS?�d@��\��^�߷/d6�۝%@8tQd���Ɨu�����0�f�ę�LϫZ�_*;��,��Nf���}ynV�ϣ�q}t-QP���E���/�+�!�FmYn]���,kf��-Q�R�_6��WXT�V�Vl���gIZh!��$��0��$��H������RN|RZu��҄����iF|RZ��(U�'�ձ/���p�&+�O��D�ɩ���59��p�&/�O /Parent 3 0 R Swapan Kumar Haldar, in Mineral Exploration (Second Edition), 2018. This involves the detection and measurement of radiation of different wavelengths reflected or emitted from distant objects or materials, by … The energy waves vary in size and frequency. 14. Fundamentals of Remote Sensing 1.2 Electromagnetic Radiation As was noted in the previous section, the first requirement for remote sensing is to have an energy source to illuminate the target (unless the sensed energy is being emitted by the target). x�%��p�Ƒ��ר��� \����p���WV�����p����'\���C 5 0 obj Sun which represents the initial source of most of the electromagnetic energy recorded by remote sensing systems (except radar). Remote sensing visual information Remote sensing works on electromagnetic radiation. The photographic process uses chemical reactions on the surface of light-sensitive film to detect and record energy variations. 130 Biomass and Remote Sensing of Biomass The EM spectrum can be divided into seven different regions gamma rays, X-rays, ultraviolet, visible light, infrar ed, microwaves and radio waves. The plotting of such variations is known as the Electromagnetic … D. None of these. Hence, it is essential to understand the effects of atmosphere on the electromagnetic radiation travelling from the Earth to … 3 0 obj Section 1.2 Electromagnetic Radiation Full text access 8. The stored data can often be transformed into an image by a computer using dedicated software. • Remote sensing is concerned with the measurement of EMR returned Remote sensing imagery has … $�A��]+4q�_�@E�ʲ//����#���|�T�q�$3R�S���&�@#H�� 9�����حt?�l;�������l���ČL?L�+��糗Z��\���Q'H8�o���ۏN0���+������W�a�V�IR'�����׏�?ߠ��bL?�1 �#���]�7��#6>�j�H��2�AC�z���� �����É�����#�H��F{p�@6Zj��~l��gnf3wo�8����������p{�\�r�i��g�S��O J����^�V2���/�_��!�E>c�G�o ��V��>��1P�2�L}�MBGvdcu2�ҏ5�{�l. B. The Earth s atmosphere absorbs, scatters, and emits electromagnetic radiation. Electromagnetic radiation which is reflected or emitted from an - object is the usual source of remote sensing data. Visible light is just one of many forms of electromagnetic energy. Remote sensing: principles, electromagnetic spectrum, components and applications Remote sensing, also called earth observation, refers to obtaining information about objects or areas at the Earth’s surface without being in direct contact with the object or area. Electromagnetic radiation which is reflected or emitted from an - object is the usual source of remote sensing data. x���Gϩ���t< � +�.g����8e�9+�E0OX�+�u>�. coefficient of the object and its spectral variation and thus on the nature of the object. However any media such as gravity or magnetic fields can be utilized in re-mote sensing. Fundamental Properties of Electromagnetic Waves. The principles of remote sensing are based primarily on the proper-ties of the electromagnetic spectrum and the geometry of airborne or satellite platforms relative to their targets. Different Optical imaging is the widely used passive remote sensing. Describes the total electromagnetic radiation emitted by a blackbody as a function of the absolute temperature which corresponds to the area under the radiation curve (integral). Transcription. Remote sensing is the science and art of identifying, observing, and measuring an object without coming into direct contact with it. 1 0 obj Although air molecules are the primary actors in these processes, aerosol particles are also present XELTXLWRXVO\ VHH&KDSWHU DQGPRGLI\WKHUDGLDWLRQÀHOG ,Q IDFW WKLVPRGLÀFDWLRQFRQ - stitutes the very physical basis of aerosol remote sensing. Active remote sensing. Which one of the following quantities forms the basis of radiometry? Primarily a textbook for graduate courses in electrical engineering, Electromagnetic Wave Propagation, Radiation, and Scattering is also ideal for graduate students in bioengineering, geophysics, ocean engineering, and geophysical remote sensing. /Type /Page C. Neutral remote sensing. characteristics of electromagnetic radiation in terms of their wavelength and frequency is crucial to understanding the information to be extracted from remote sensing data. When electromagnetic radiation travels through the atmosphere, it may be absorbed or scattered by the constituent particles of the atmosphere. 5 1.2 Electromagnetic Radiation 7 1.3 Electromagnetic Spectrum 9 1.4 Interactions with the Atmosphere 12 1.5 Radiation - Target 16 1.6 Passive vs. 1.1 What is Remote Sensing? stream It consists of both electric and magnetic field components. <> �̖*�D Remote sensing: principles, electromagnetic spectrum, components and applications. �ZCiXV��s�Wkhc�O /Contents 7 0 R Download PDF. What is electromagnetic radiation (EMR)? <> /Fcpdf4 58 0 R In remote sensing, the sun is the most obvious source of EMR (solar In this sense, incident solar radiation can follow three pathways: it can be transmitted, reflected, or absorbed. We mention how electromagnetic radiation is used actively for radio communications with Earth-orbiting satellites and passively for remote sensing investigations not … Everything emits electromagnetic radiation. Natural Sources of Electromagnetic Radiation All objects with a temperature above absolute zero (–273oC, 0K) emit EMR continuously. 8깂�G Sources of Electromagnetic Radiation Remote sensing uses EMR from both natural sources and artificial sources. Electromagnetic radiation • All bodies with a temperature above –273 °C (0 °K) emit energy • A blackbody reflects no radiation. Remote sensing: principles, electromagnetic spectrum, components and applications Remote sensing, also called earth observation, refers to obtaining information about objects or areas at the Earth’s surface without being in direct contact with the object or area. Electromagnetic radiation spectrum Remote sensing involves the measurement of energy in many parts of the electromagnetic (EM) spectrum. endobj The Earth s atmosphere absorbs, scatters, and emits electromagnetic radiation. They should already possess an understanding that white light is the combination of all colors of the spectrum. radiation can be treated physically as a wave motion However in the visible and. Nomenclature and Definition of Radiation Quantities. /CropBox [0 0 612 792] �ZC�'+�j -���5��#\�q�R�gj�#�IWkx����tX}���cm�Z"�eC�XA� /BaseEncoding /MacRomanEncoding Swapan Kumar Haldar, in Mineral Exploration (Second Edition), 2018. 3 0 obj • The whole range of EMR is called spectrum. << A device to detect the electromagnetic radiation reflected or emitted from an object is called a “remote sensor” or - “sensor”. Remote sensing imagery has … endobj Interaction of Electromagnetic Waves with Matter: Quick Overview. Sensors 2.1 On the Ground, In the Air, In Space 34 Remote sensing system that measures naturally available energy is called a passive sensor. Fig. ��p��$�I�c��tR�՚��O D. None of these. Although air molecules are the primary actors in these processes, aerosol particles are also present XELTXLWRXVO\ VHH&KDSWHU DQGPRGLI\WKHUDGLDWLRQÀHOG ,Q IDFW WKLVPRGLÀFDWLRQFRQ - stitutes the very physical basis of aerosol remote sensing.