Abstract
Rain attenuation values were calculated using empirical raindrop-size distributions, which were, Marshall-Palmer (M-P), Best, Polyakova-Shifrin (P-S) and Weibull raindrop-size distributions, and also calculated using a specific rain attenuation model for prediction methods recommended by ITU-R. Measurements of Terahertz wave taken at 313 GHz (0.96 mm) were compared with our calculations. Results showed that the propagation experiment was in very good agreement with a calculation from the specific attenuation model for use in prediction methods by ITU-R.
Highlights
Recent advances in electronic and electro-optical Terahertz devices, and improvements in system technology, have stimulated in imaging and sensing applications in the security and non-destructive testing field [1].Rain attenuation is one of important obstacle to overcome for imaging and sensing system to detect the hazardous things using Terahertz waves above 300 GHz because of its masking action
Raindrop-size distribution has been found to play an important role in monitoring rainfall and in predicting the rain attenuation
Rain drop-size distributions were used for M-P, Best, P-S and Weibull which were described in Equations (1), (2), (3) and (4) respectively, and specific attenuation model recommended by ITU-R was used for ITU-R which was described in Equation (7)
Summary
Recent advances in electronic and electro-optical Terahertz devices, and improvements in system technology, have stimulated in imaging and sensing applications in the security and non-destructive testing field [1]. Rain attenuation is one of important obstacle to overcome for imaging and sensing system to detect the hazardous things using Terahertz waves above 300 GHz because of its masking action. Raindrop-size distribution has been found to play an important role in monitoring rainfall and in predicting the rain attenuation. The rain attenuation is severe and greatly dependent on various models of raindrop-size distribution in a Millimeter and Terahertz wave system
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