Colocated transmissometer for EO atmospheric measurements

This publication will depict recent results from a co-located multi-wavelength transmissometer. The system uses a single telescope to transmit and receive a temporally modulated cascading pulse train from multiple super-luminous LEDs (SLEDs). The signal return is facilitated by retroreflector(s) mounted in a static ground-based array or mounted to a dynamic Un-crewed Aerial System (UAS). The system measures electro-optical (EO) transmission along chosen propagation vectors to develop ground truth timeseries datasets of wavelength dependent transmission and attenuation parameters that will improve the accuracy and speed of test and evaluation efforts for EO atmospheric propagation models. Recent results of ground-based and aerial-based testing will be compared to the performance to physics-based propagation models, and a fog monitor providing localized liquid water content.