Atmospheric measurements from an airborne IR beacon in a maritime environment via DIMM and WATT

Phillip Land; James Roeder; John Siegenthaler; Oswaldo Alvarenga

doi:10.1117/12.2558844

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22 April 2020 Atmospheric measurements from an airborne IR beacon in a maritime environment via DIMM and WATT

Phillip Land, James Roeder, John Siegenthaler, Oswaldo Alvarenga

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Proceedings Volume 11420, Ocean Sensing and Monitoring XII; 1142007 (2020) https://doi.org/10.1117/12.2558844
Event: SPIE Defense + Commercial Sensing, 2020, Online Only

Abstract

A maritime environment presents a complex problem for propagating a laser through its turbulent nature. The environment includes standard aerosols, sea surface spray, and atmospheric turbulence when propagating along horizontal, vertical, or slant angled paths. Atmospheric measurements of the turbulence structure (Cn 2) and Fried’s coherence length (r0) were taken in a maritime environment using an IR Laser beacon at 1.06 microns mounted on an unmanned aerial system (UAS) at varying distances and slant angles using a Differential Image Motion Monitor (DIMM) and Wide-Angle Teleradiometric Transmissometer (WATT). The DIMM measured the coherence length, r0 and atmospheric turbulence strength, Cn 2 from the IR Laser beacon source as it propagated through the atmosphere. The WATT measured the transmissivity of the IR Laser beacon through the atmosphere.

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Phillip Land, James Roeder, John Siegenthaler, and Oswaldo Alvarenga "Atmospheric measurements from an airborne IR beacon in a maritime environment via DIMM and WATT", Proc. SPIE 11420, Ocean Sensing and Monitoring XII, 1142007 (22 April 2020); https://doi.org/10.1117/12.2558844

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