The other two rely on direct contact with the source of information - which are they? 25. 6. Sensors B. The emission is in the form of various electromagnetic waves. Remote sensing is a way of collecting and analysing data to get information about an object without the instrument used to collect the data being in direct contact with the object. Elements of Visual Image Interpretation REFERENCE: Remote Sensing of the Environment John R. Jensen (2007) Second Edition Pearson Prentice Hall. 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. 1. The term is applied especially to acquiring information about the Earth. Did you know that the idea of taking the still photographs of Earth for the objective of topographic mapping surfaced in the middle of the 1840s? The purpose of this online test is to help you evaluate your Elements of Remote Sensing Mcqs knowledge yourself. Remote Sensing Systems: These systems consist of a number of elements. Passive sensors C. Active sensors D. None of these. In much of remote sensing, the process involves an interaction between incident radiation and the targets of interest. Pick up the correct statement from the following: A. Topology describes the geometric characteristic of objects which do not change under transformations and are independent of any coordinate system. For example, if you take a photograph of your house, and on the picture you see that the house is composed of a roof, walls and windows, all of which appear as different colours, then this is remote sensing. Process and Elements of Remote Sensing. In much of remote sensing, the process involves an interaction betee n incident adiation and the targets of interest. This is done by sensing and recording reflected or emitted energy and processing, analyzing, and applying that information.". The cameras record the energy in films and the sensors convert the energy into electrical signals and send them to the earth's receiving stations. There are three major remote sensing platforms: ground-level platform (towers and cranes), … For the purposes of this tutorial, we will use the following definition: "Remote sensing is the science (and to some extent, art) of acquiring information about the Earth's surface without actually being in contact with it. 6. Interaction with the Target (C) - once the energy makes its way to the target through the atmosphere, it interacts with the target depending on the properties of both the target and the radiation. Copyright © 2018-2021 BrainKart.com; All Rights Reserved. Fully solved Multiple choice … A. Remote sensing systems which measure energy that is naturally available are called Passive Sensors. The sun's energy is either reflected, as it is for visible wavelengths, or absorbed and then re-emitted, as it is for thermal infrared wavelengths. These seven elements comprise the remote sensing process from beginning to end. Sensors used 8. Interaction of Sunlight with Terrestrial Features: Electromagnetic waves in sunlight have different wave lengths. This is done by sen sing and recording reflected or emitted energy and processing, analyzing, and applying th at information." These seven elements comprise the remote sensing process from beginning to end. Remote sensing technology is used to summon information and understanding about an object while dealing with any physical contact. Types 5. So, what exactly is remote sensing? Remote sensing is the acquisition of information about an object without coming in physical contact of that object. Remote sensing is the acquisition of data for determining information regarding objects located on the earths surface or in its atmosphere by using sensors in different spectral regions in inter-action between the targets and electromagnetic energy. Remote sensing is the acquisition of information about an object or phenomenon without making physical contact with the object and thus is in contrast to on-site observation. These Multiple Choice Questions (MCQs) on Elements of Remote Sensing Mcqs will prepare you for technical round of job interview, written test and many certification exams. Elements of Remote Sensing MCQ with Answers - Set 05 MCQ Remote Sensing Edit Practice Test: Question Set - 05. It monitors the earth’s natural and other resources and of determining the impact of man’s activities on air, water, and land. We will be covering all of these in sequential order throughout the five chapters of this tutorial, building upon the information learned as we go. Sun as a Source of Energy: Sun is the prime source of energy to the world. That surface impression is typically very subtle, so it helps to know the general area to be searched and the nature of the feature being sought. Remote sensing is very useful for finding out the data necessary for making decisions and formulations of policy, land use and resource development. Advantages of Remote sensing. So, the balance of electromagnetic radiation reaches the earth's surface as sunlight. The spectral region of the electromagnetic radiation which passes through the atmosphere without much … Stages 6. Elements of Remote Sensing MCQ Test & Online Quiz: take the Elements of Remote Sensing MCQ test that checks your basic knowledge of Elements of Remote Sensing MCQ. Definition of Remote Sensing: The term remote sensing was introduced in USA in the late 1950s to attract funding from the US office of Naval Research. These systems consist of a number of elements. Sometimes the 'impression' that a buried artifact, such as an ancient fort foundation, leaves on the surface, can be detected and identified. Any object, with a temperature of about 0o K (273o C) will emit energy. This band of rays is called the 'electromagnetic radiation' (EMR). Remote Sensing Laboratory, Geography Department, Tel Aviv University, Israel GIS unit, the Society for the Protection of Nature in Israel noam71levin@hotmail.com. The ratio of the up flux and down flux just above the snow surface, is called albedo B. Spectral albedo of snow is calculated for the semi-infinite snow thickness C. Water equivalent height of snow is the height of water column obtained by melting snow D. All of these. The instruments which provide electromagnetic radiation of specified wave length or a band of wave lengths to illuminate the earth surface are called_____? Solved examples with detailed answer description, disscussion in forum … Elements of Remote Sensing - Section 1. Of our five senses (sight, hearing, taste, smell, touch), three may be considered forms of "remote sensing", where the source of information is at some distance. (BS) Developed by Therithal info, Chennai. 1. You will not receive a reply. The elements range from solar radiation to the application of imageries for public problems, through various stages. Elements of Remote Sensing - Section 1. Thus, a satellite image is composed different digital values or pixels. Passive & Active Remote Sensing • The sun provides a very convenient source of energy for remote sensing. Elements of Remote Sensing. 1. We will be covering all of these in sequential order throughout the five chapters of this tutorial, building upon the information learned as we go. These seven elements comprise the remote sensing process from beginning to end. 7. CNR MilanoNational Research Council of Italy, Institute for the Electromagnetic Sensing of the EnvironmentMilanoItaly. Potential Applications. 3. 0.4 to 1.3, 1.5 to 1.8, 2.2 to 2.6 μm B. Radiation and the Atmosphere (B) - as the energy travels from its source to the target, it will come in contact with and interact with the atmosphere it passes through. Transmission, Reception, and Processing (E) - the energy recorded by the sensor has to be transmitted, often in electronic form, to a receiving and processing station where the data are processed into an image (hardcopy and/or digital). The use of sound is an obvious alternative; thus you can claim that your telephone conversation is indeed 'remote sensing'. Electromagnetic spectrum contains: (A) Gamma rays (wave length < 10-10 m) (B) Ultraviolet rays (wave length < 10-6 m) (C) Infrared rays (wave length < 10-4 m) (D) All of these . The elements range from solar radiation to the application of imageries for public problems, through various stages. 4. For enquiries, contact us. 7. Elements of Remote Sensing. General Utility 4. T his is exemplified by the use of imaging systems … Application (G) - the final element of the remote sensing process is achieved when we apply the information we have been able to extract from the imagery about the target in order to better understand it, reveal some new information, or assist in solving a particular problem. You have to select the right answer to the question. Can "remote sensing" employ anything other than electromagnetic radiation? Terrestrial Radiation of the Earth's Element: The solar energy, along with the energy already stored in the elements on the earth, are radiated back into the atmoshpere. A Platform is defined as the carrier for remote sensing sensors. Application (G) - the final element of the remote sensing process is achieved when we apply the information we have been able to extract from the imagery about the target in order to better understand it, reveal some new information, or assist in solving a particular problem. Basic Concept 7. Each point or picture element gets different (pixel) digital numbers. This is exemplified by the use of imaging systems where the following seven elements are involved. This interaction may take place a second time as the energy travels from the target to the sensor. July 1, 2019 November 9, 2018 by abbuiftkhar. Principle of Remote Sensing. Remote sensing (image interpretation) has been used for archeological investigations. Collection of Information/Data: The energy thus reflected and emitted by the earth's features are recorded by cameras and sensors fitted onto the various platforms. The reflectance varies according to the wave length. measures reflected echo (backscatter) Structure of the course: Passive remote sensing using scattering and extinction (Lectures 9-13) Passive remote sensing using emission (Lectures 14-19) Active remote sensing (Lectures 20-26) 2. A. What is Remote SensingIt is a method of collecting information aboutan object without the instrument being used tocollect the data, coming in direct with the object.In other words it means, ‘measuring at a distance without physical contact’.Like, Eyesight is a form of remote sensing.When we take a photograph of an object, theEMR (Electromagnetic Radiations) is recorded on the film.A … Finally, you can also take the Online Quiz from the Take Elements of Remote Sensing Quiz … 8. … … Pick up the correct statement from the following: A. 1. In fact, sight, smell, and hearing all are the forms of remote sensing. Elements of Remote Sensing. Thus, all objects over the earth have temperatures above 0o K and therefore emit energy at varying levels. 7.Application (G) - the final element of the remote sensing process is achieved when we apply the information we have been able to extract from the imagery about the target in order to better understand it, reveal some new information, or assist in solving a particular problem. Recording of Energy by the Sensor (D) - after the energy has been scattered by, or emitted from the target, we require a sensor (remote - not in contact with the target) to collect and record the electromagnetic radiation. Elements of Remote Sensing. Remote sensing is the science of acquiring information about the Earth's surface without actually bein g in contact with it. The main goal of Remote Sensing (RS) is the production of maps, mainly thematic but also topographic. ELEMENTS of REMOTE SENSING Multiple Choice Questions :-Q No: 1. 5. It is is the study of an object from a distance to know about the chemical and physical characteristics of the object. Application (G) - the final element of the remote sensing process is achieved when we apply the information we have been able to extract from the imagery about the target in order to better understand it, reveal some new information, or assist in solving a particular problem. These seven elements comprise the remote sensing process from beginning to end. It consists of gamma rays to radio waves (short wave length). Elements of Remote Sensing Civil Engineering Questions and Answers with explanation for placement, interview preparations, entrance test. Thus, the spectral reflectances from the earth, in fact earth objects, are of many thousand types. Pick up the correct statement from the following? Questions related to Element of Remote Sensing can be found here in this section and you will get all necessary MCQs of this field. 2. Interaction of Solar Energy with Atmospheric Elements, Interaction of Sunlight with Terrestrial Features, Terrestrial Radiation of the Earth's Element, Ecosystems : Information and Communication Systems : Technological, Technical Development, Classification of Satellite Remote Sensing : Geo, Sun, Spy Satellites, Water Based, Related and Waterborne Diseases. A portion of the 'electromagnetic radiation' is absorbed by carbon di oxide, ozone, moisture and dust and reflected back. Sun as a Source of Energy: Sun is the prime source of energy to the world. Interaction of Solar Energy with Atmospheric Elements: When the solar energy passes through the atmosphere, many elements await to meet the energy. Energy Source or Illumination (A) - the first requirement for remote sensing is to have an energy source which illuminates or provides electromagnetic energy to the target of interest. Platform . These seven elements comprise the remote sensing process from beginning to end. These bands of radiation fall on the objects of the earth and get reflected, differently by different objects. 2. Emission of Sun's Energy : Solar energy is emitted into the space. Radar transmits a pulse and. Enjoy the journey! The remote sensing techniques applied for the earth's surface features, is generally confined to the following wave lengths : A. Remote sensing is defined as collecting data and information about a target without coming in contact with it. The source of remote sensing data is the electromagnetic radiations which are emitted or reflected by the object, which then helps in their identification and classification. 0. Human eyes are a very good example of remote sensing. B. Topological characteristics of an object are independent of scale measurement . 1. A number of bands can be identified based on the wave lengths. This is a modern technology that started when the camera was invented for the first time. Interpretation and Analysis (F) - the processed image is interpreted, visually and/or digitally or electronically, to extract information about the target which was illuminated. Through such reflectance, various wave lengths help in remote sensing to identify various elements over the earth. 4. Note, however that remote sensing also involves the sensing of emitted energy and the use of non-imaging sensors. 3. This is the civii engineering questions and answers section on 'Elements Of Remote Sensing' with the option for disscussion in forum , usefull for competitive examination and entrance test like GATE ESE PSU. Questions related to Element of Remote Sensing can be found here in this section and you will get all necessary MCQs of this field. 0. Devices used for Remote Sensing 3. Definition of Remote Sensing 2. Components of Remote Sensing 1. Study Material, Lecturing Notes, Assignment, Reference, Wiki description explanation, brief detail. Remotely Sensed Data Supply: Satellite images and the aerial photographs can be obtained from three organisations or places in India as indicated below: National Remote Sensing Agency, Hyderabad. Elements of Remote Sensing. 67+ Elements of Remote Sensing Mcqs online test. This Elements of Remote Sensing MCQ Test contains 20 Multiple Choice Questions. 1. 5. Remote Sensing Core Curriculum 1530 Cleveland Ave N, 115 Green Hall, St. Paul, MN 55108 (612) 625-5354 | jknight@umn.edu It is the resource for all activities of the life forms. In remote sensing technique, the observation place, is called a platform B. Data Acquisition by the Earth Station: The electrical pulses from the remote sensors are converted into 'digital' numbers. Active remote sensing to identify various elements over the earth Station: the electrical pulses from the have! Solar energy passes through the atmosphere, many elements await to meet the energy Visual Image Interpretation:. 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