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instruments:hatpro:hatpro [2016/06/11 21:11] – susanneinstruments:hatpro:hatpro [2016/06/11 21:14] – susanne
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 ===== Introduction ===== ===== Introduction =====
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 Microwave radiometers are very sensitive receivers designed to measure thermal electromagnetic radiation emitted by material media like the atmosphere. They are usually equipped with multiple receiving channels in order to derive the characteristic emission spectrum of the atmosphere or extraterrestrial objects. Microwave radiometers are utilized in a variety of environmental and engineering applications, including weather forecasting, climate monitoring, [[https://en.wikipedia.org/wiki/Radio_astronomy|radio astronomy]] and radio propagation studies.  Microwave radiometers are very sensitive receivers designed to measure thermal electromagnetic radiation emitted by material media like the atmosphere. They are usually equipped with multiple receiving channels in order to derive the characteristic emission spectrum of the atmosphere or extraterrestrial objects. Microwave radiometers are utilized in a variety of environmental and engineering applications, including weather forecasting, climate monitoring, [[https://en.wikipedia.org/wiki/Radio_astronomy|radio astronomy]] and radio propagation studies. 
  
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 ===== Design ===== ===== Design =====
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 The principal components of a microwave radiometer often follow a similar design and can be grouped into: antenna system, microwave radio-thermal receiver, recording and storage devices and a final processing unit. Usually ground-based radiometers are also equipped with environmental sensors (rain, temperature, humidity) and GPS receivers (time and location reference). The antenna itself often measures through a window made of foam which is transparent in the MW (light blue material in Fig. 1) in order to keep the antenna clean of dust, liquid water and ice. Often, also a heated blower system is attached the radiometer which helps to keep the window free of liquid drops or dew (strong emitters in the MW) but also free of ice and snow. The principal components of a microwave radiometer often follow a similar design and can be grouped into: antenna system, microwave radio-thermal receiver, recording and storage devices and a final processing unit. Usually ground-based radiometers are also equipped with environmental sensors (rain, temperature, humidity) and GPS receivers (time and location reference). The antenna itself often measures through a window made of foam which is transparent in the MW (light blue material in Fig. 1) in order to keep the antenna clean of dust, liquid water and ice. Often, also a heated blower system is attached the radiometer which helps to keep the window free of liquid drops or dew (strong emitters in the MW) but also free of ice and snow.
  
-{{:instruments:hatpro:mwr_4.png?400 |Schematic diagram of a microwave radiometer [8].}} \\ +{{:stuff:mwr_design.png?200|Schematic diagram of a microwave radiometer}} \\ 
-Fig. 2Schematic diagram of a microwave radiometer [8].+Fig. 4: Schematic diagram of a microwave radiometer.
  
 ===== Calibration ===== ===== Calibration =====
instruments/hatpro/hatpro.txt · Last modified: 2021/01/22 22:17 by 127.0.0.1