Transcription of Chapter 7 84 Introduction To Remote Sensing - NCERT
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Chapter 7 84 Introduction To Remote Sensing - NCERT
84 Practical Work in GeographyChapter 7 Introduction To RemoteSensingYou have read about aerial photography in Chapter 6. If you havecarefully gone through its contents, you would have appreciatedthat it is an extension of the observation and recording capabilitiesof the human eyes. You may also have noticed that the photographicsystem utilises the same principles of observation and recording theobjects of the earth s surface, as being done by the eyes. However,both the human eyes and the photographic systems respond to lightin a minute portion of the total energy received and responded bythe objects surface. The present day Remote Sensing devices, on theother hand, react to much wider range of radiations reflected/emitted,absorbed and transmitted by all object surfaces at a temperature above0 Kelvin (-273 C).The term Remote Sensing was first used in the early 1960s.
Introduction To Remote Sensing e. Detection of Reflected/Emitted Energy by the Sensor: The sensors recording the energy that they receive are placed in a near– polar sun synchronous orbit at an altitude of 700 – 900 km. These satellites are known as remote sensing satellites (e.g. Indian Remote Sensing Series).
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