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Influence of aerosols on atmospheric transmission at the Baltic Sea: Comparison of experimental results with model simulations using MODTRAN

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Author: Vogelbacher, S. · Sprung, D. · Eijk, A.M.J. van · Stein, K.
Type:article
Date:2015
Publisher: SPIE
Source:Gonglewski, J.D.Stein, K.U., Optics in Atmospheric Propagation and Adaptive Systems XVIII, 22 September 2015, 9641
series:
Proceedings of SPIE - The International Society for Optical Engineering
Identifier: 534547
doi: doi:10.1117/12.2197090
ISBN: 9781628418514
Article number: 964106
Keywords: Aerosol distribution · Horizontal propagation · Modtran · Defence, Safety and Security · 2015 Observation, Weapon & Protection Systems · ED - Electronic Defence · TS - Technical Sciences

Abstract

A recent field trial in the Northern German littoral area of the Baltic Sea yielded a dataset of visibility, meteorological parameters, aerosol size distributions, as well as transmission over a horizontal path of 1344 m. The experimental results are compared to simulations using the MODTRAN (moderate resolution atmospheric transmission) model, that was run with the rural and Navy Aerosol Model, (NAM) in various configurations. Best results were obtained when MODTRAN was tuned with the measured visibility values. When NAM was used without visibility tuning, MODTRAN tended to overestimate the transmission in low-visibility conditions, which was attributed to the presence of a non-maritime aerosol fraction. © 2015 SPIE.