CSIR (Council of Scientific & Industrial Research) Earth Sciences Surface Features and Processes-Formation of Soil Study Material (Page 1 of 12)

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Basic Physics of Remote Sensing; Electromagnetic Radiation; Electromagnetic Radiation Quantities

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Introduction

  • In the 1950s, Ms. Evelyn Pruitt of U. S. Naval Research Office gave the term ‘remote sensing’ . It very well may be characterized as means acquiring information about a phenomenon, object or surface from a specific distance.
  • This field is ascribed to the different advancements in satellite technology, computers, sensors and spacecraft from 1960 onwards.
  • All objects radiate electromagnetic energy by virtue of their atomic and molecular vibrations at a temperature above absolute zero.
  • The total amount of emitted radiation increases with the body՚s absolute temperature, and its peaks are at progressively shorter wavele…

… (943 more words, 240 figures) …

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Basic Physics of Remote Sensing; Thermal Emission of Radiation; Radiation Principles

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Thermal Emission of Radiation

  • All objects at all temperatures transmit EMR at all frequencies or wavelengths.
  • The thermal emission of radiation is because of the change of heat energy, which is the kinetic energy of the random motion of the particles of the matter, into EM energy.
  • Thermal emission of radiation relies on two parameters i.e.. , absolute Temperature (T) and Emissivity (ε) .…

… (246 more equations, 11 figures) …

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