Measuring horizontal atmospheric turbulence at ground level from optical turbulence generator (OTG) using a 1D sensor

Omar J. Tíjaro Rojas; Yezid Torres Moreno; William T. Rhodes

doi:10.1117/12.2270380

26 June 2017 Measuring horizontal atmospheric turbulence at ground level from optical turbulence generator (OTG) using a 1D sensor

Omar J. Tíjaro Rojas, Yezid Torres Moreno, William T. Rhodes

Author Affiliations +

Proceedings Volume 10329, Optical Measurement Systems for Industrial Inspection X; 1032949 (2017) https://doi.org/10.1117/12.2270380
Event: SPIE Optical Metrology, 2017, Munich, Germany

Abstract

Different theories including Kolmogorov have been valid to explain and model physic phenomenal like vertical atmospheric turbulence. In horizontal path, we still have many questions, due to weather problems and consequences that it generates. To emulate some conditions of environment, we built an Optical Turbulence Generator (OTG) having spatial, humidity and temperature, measurements that were captured in the same time from optical synchronization. This development was made using digital modules as ADC (Analog to Digital Converters) and communications protocol as SPI. We all made from microcontrollers. On the other hand, to measure optical signal, we used a photomultiplier tube (PMT) where captured the intensity of fringes that shifted with a known frequency.

Outcomes show temporal shift and phase drive from dependent samples (in time domain) that correspond with frozen turbulence given by Taylor theory. Parameters studied were C²_n, scintillation and inner scale in temporal patterns and analysis of their relationship with the physical associated variables. These patterns were taken from Young Interferometer in laboratory room scale. In the future, we hope with these studies, we will can implement an experiment to characterize atmospheric turbulence in a long distance, placed in the equatorial weather zone.

Citation Download Citation

Omar J. Tíjaro Rojas, Yezid Torres Moreno, and William T. Rhodes "Measuring horizontal atmospheric turbulence at ground level from optical turbulence generator (OTG) using a 1D sensor", Proc. SPIE 10329, Optical Measurement Systems for Industrial Inspection X, 1032949 (26 June 2017); https://doi.org/10.1117/12.2270380

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