instruments:scintillometer:scintillometer
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instruments:scintillometer:scintillometer [2014/11/26 17:25] – [Instrument] jan | instruments:scintillometer:scintillometer [2015/09/04 07:34] – [Principle] rainer | ||
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====== Scintillometer ====== | ====== Scintillometer ====== | ||
- | //Mentors: R. Haseneder-Lind, | + | |
+ | // | ||
===== Principle ===== | ===== Principle ===== | ||
- | The Large Aperture Scintillometer (LAS) is a instrument designed for measuring the path-averaged structure parameter of the refractive index of air (Cn^2) over horizontal path lengths from 250m to 4,5km. Structure parameter measurements obtained with the LAS and standart meteorological observations (air temperature, | + | The Large Aperture Scintillometer (LAS) is an instrument designed for measuring the path-averaged structure parameter of the refractive index of air (Cn^2) over horizontal path lengths from 250m to 4,5km. Structure parameter measurements obtained with the LAS and standart meteorological observations (air temperature, |
The LAS optically measure intensity fluctuations (known as scintillations) using a transmitter and receiver horizontally separated by several kilometers. The scintillations seen by the instrument can be expressed as the structure parameter of the refractive index of air(Cn^2). The light source of the LAS transmitter operates at a near-infrared wavelength of 880nm. At this wavelength the observed scintillations are primarily caused by turbulent temperature fluctuations. Therefore Cn^2 measurements obtained with the LAS can be related the sensible heat flux. | The LAS optically measure intensity fluctuations (known as scintillations) using a transmitter and receiver horizontally separated by several kilometers. The scintillations seen by the instrument can be expressed as the structure parameter of the refractive index of air(Cn^2). The light source of the LAS transmitter operates at a near-infrared wavelength of 880nm. At this wavelength the observed scintillations are primarily caused by turbulent temperature fluctuations. Therefore Cn^2 measurements obtained with the LAS can be related the sensible heat flux. | ||
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===== History ===== | ===== History ===== | ||
^ Period | ^ Period | ||
- | | 23.03.10 - today | [[http:// | + | | 23.03.10 - 19.9.2013 |
===== Data ===== | ===== Data ===== |
instruments/scintillometer/scintillometer.txt · Last modified: 2021/01/22 22:17 by 127.0.0.1