Related obscuration value and sensitivity

Question

As i am calculating the ptr values so i get the ptr values. so can you tell me how to calculate the obscurtion level per foot and sensitivity. if there is any formula tell me how to calculate it explain me through any example

Neal.Kurfiss · Accepted Answer

There is no direct way to correlation between obscuration and PTR values for all types of smoke as each type has different reflective properties, and there is a large reflectance componant in the way the optics work. However for a given typ of smoke obscuration and PTR track linearly. The ADSW_SMOKEALGO works by inteligently identifying the type of smoke and dynamically shifting the smoke thresholds.)

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Related obscuration value and sensitivity