A system includes an image capture device within an existing aircraft shell having a turbine or a rotary wing, the image capture device including an optical assembly having a field of view directed towards at least one of the turbine, the rotary wing, and a surface of the aircraft shell, the image capture device configured to capture an image of radiant flux, and an image analysis unit in communication with the image capture device to analyze the captured radiant flux image to determine a particulate matter concentration in a debris suspension cloud. The system can also include a quantizer unit to quantize an electrical signal from the image capture device, the electrical signal proportional to an intensity of the radiant flux, and an integrator unit to obtain an about continuous value of the radiant flux intensity. A method to implement the system and a non-transitory computer-readable medium are also disclosed.
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