Remote sensing is science and art of obtaining information about the object , area or phenomena of interest by a device that is not in direct contact.
History of Remote sensing
1609- Invention of telescope by Galileo
1859 - First aerial photographer Gaspard Felix Tournachon took photo through hot air balloon
1908 - First aerial photo from airplane
1914-1918 - Use of aircrafts during World war I for aerial photographs
Electromagnetic Spectrum
The range of wavelengths or frequencies over which electromagnetic radiation extends.
Resolutions
i. Radiometric Resolution
Radiometric Resolution is how finely a satellite or sensor divides up the radiance it receives in each band.
ii. Spatial Resolution
It is the length of one side of a single pixel.
iii. Spectral Resolution
iv. Temporal Resolution
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