Radio Spectrum: part of electromagnetic spectrum, frequencies from 30Hz to 300GHz; used mostly in telecommunication—whose generation and interefernece governed by International Telecommuniation Union (ITU) formed in 17 May 1865. * Frequency Bands in the microwave range are noted with letters, which started around world war II * microwave range: electromagnetic radiation ranging from one metre to one mm 300MHz to 300GHz, * Radar: detection system using radio waves to detect range, angle, and velocity of objects (Radio Detection And Ranging) * widely used standard is by IEEE radar bands L Band (1 to 2 GHz, 15 to 30 cm λ ): for clear turbulence studies, S Band (2 to 4 GHz, 5 to 15 cm λ ): weather observation, for space communications with space shuttle C Band (4 to 8 GHz, 3.75 to 5cm λ ): TV stations, less power compared to S band X Band (8 to 12 GHz, 2.5 cm to 3.75 cm λ): sensitive, for study of clouds, used in airplanes, airplanes, radar applications: continuous wave, pulsed
A learner's blog; posts on agronomy, crops, remote sensing, GIS ~everything as a learning/writing practice, also contains personal opinions/comments, Nepali writings ~blog has no objective of harming anyone—comments/suggestions are cordially welcomed ^ ^