Pure rotational Raman lidar for the measurement of vertical profiles of temperature in the lower atmosphere

Satyanarayana, M.; Radhakrishnan, S. R.; Presennakumar, B.; Murty, V.S.; Bindhu, R.

doi:10.1117/12.694008

Cited by 2 publications

(2 citation statements)

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“…In addition, it can retrieve the atmospheric temperature profile from the echoes directly [5,10] , with no need for reference value settings of temperature and atmosphere density, so it's also barely affected by human factors. And finally, the intensity of the Pure Rotational Raman signal (PRRS) of Nitrogen is 3 orders of magnitude higher than its Vibrational Raman signal [6] . So, compared with Vibrational Raman Lidar, the atmospheric temperature profile obtained by Pure Rotational Raman Lidar is much more accurate and reliable.…”

Section: Introductionmentioning

confidence: 99%

“…It is a robust tool with a multi-function capability that can be employed to measure a wide range of meteorological and environmental properties [5] , including the temperature. Compared with other instruments, it enjoys many advantages, such as higher temporal and spatial resolution [6,7] , larger detection range, and the capability to perform atmosphere detection continuously [1,8] . Depending upon the manner of analyzing the spectra, lidar for troposphere temperature detection can be divided into two types: Vibrational Raman Lidar (VRL) and Pure Rotational Raman Lidar (PRRL).…”

Section: Introductionmentioning

confidence: 99%

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Time-delay compensation in data-acquisition process for rotational Raman lidar

et al. 2009

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Pure Rotational Raman Lidar is a recently developed method for atmospheric temperature detection. Since the Raman-scattering-signals are very weak, the photon-counting method is employed, which could be achieved by using a multiscaler. Time delays, which exist among the trigger channel and the two count channels of the multiscaler, will affect the corresponding relationship between the detected signals and the actual altitudes where the signals are returned, so it is necessary to make some compensation. However, it is difficult to measure the time delays with traditional instruments such as oscillograph, for there is no access to the final internal trigger signal or count signals. In this paper, a measuring system is established, with a Digital Delay/Pulse Generator as the chief component, which is not usually used as a measuring instrument. The measurement precision could reach about 50ps. Meanwhile, the compensating method is also provided to improve the positioning accuracy of the lidar system.

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Section: Introductionmentioning

confidence: 99%