Date of Award

3-2025

Document Type

Thesis

Degree Name

Master of Science

Department

Department of Engineering Physics

First Advisor

Santasri Bose-Pillai, PhD

Abstract

Small-angle scattering by relatively large cloud/fog droplets and ice crystals is known to degrade imagery. However, it is not well investigated how much of an impact aerosols, especially the prevalent anthropogenic fine/ultra-fine/coarse particles, have in image degradation. This thesis explores the contribution of aerosols to image blur but focuses on collecting field data with a relatively large variety of ambient aerosol characterization and optical instrumentation. Field experiments were conducted over six days, correlating aerosol measurements (particle counters and nephelometer) with image quality from a visible camera along a 450m path. Image blur was quantified using the Modulation Transfer Function (MTF), isolating the aerosol contribution by accounting for system and turbulence effects. Results indicate minimal aerosol-induced blur under typical conditions, with noticeable degradation observed only during elevated coarse particle concentrations.

AFIT Designator

AFIT-ENP-MS-25-M-217

DTIC Accession Number

AD1356633

Comments

An embargo was observed for posting this graduate work on AFIT Scholar.  Approved for public release, distribution unlimited. PA case number 88ABW-2025-0222.

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