Table 1 Experimental matrix showing the Rytov variance, a measure of optical turbulence strength, for the respective convective turbulence level and path lengths of the experiments presented in this paper.

From: Effects of Optical Turbulence and Density Gradients on Particle Image Velocimetry

 

Low convective turbulence: 4 degrees

Intermediate convective turbulence: 8 degrees

High convective turbulence: 13 degrees

Nearfield: 0.5 m

0.01

0.02

0.04

Midfield: 1.2 m

0.02

0.08

0.18

FarMidfield: 1.6 m

0.04; no data

0.13

0.31

Farfield: 1.9 m

0.06

0.18

0.43

  1. Note that the low optical turbulence, FarMidfield data is missing, due to a problem with the measurement.
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