Comparison of MODTRAN simulations and transmission measurements by path-integrated and in-situ techniques over a rural site in northwestern Germany
conference paper
A transmission experiment has been performed over an optical path of 1.53 km at a rural test site in Meppen, Northwest Germany. Direct transmission measurements were made by a 7-wavelength transmissometer. Transmission was further estimated from the average voltage received by a BLS2000 scintillometer, and evaluated with Mie theory from in-situ aerosol measurements near the optical path. Furthermore, the transmission was modeled with MODTRAN, driven with local meteorology, visibility and the rural aerosol model. For a central wavelength of 0.88μm, the transmissometer, the BLS200 and MODTRAN agree well. Remaining differences may be due to water transmission and continuum around 0.95μ;m that is picked up by the transmissometer and not by the narrow-banded BLS2000 and MODTRAN calculations. When MODTRAN is run without an aerosol model, or when this model is driven by a "default" visibility, the overlap with the measurements is extremely poor. © 2016 SPIE.
The Society of Photo-Optical Instrumentation Engineers (SPIE)
The Society of Photo-Optical Instrumentation Engineers (SPIE)
Topics
ExperimentMODTRANoptical particle counterscintillometertransmissiontransmissometerAdaptive systemsAerosolsExperimentsMeteorological instrumentsRural areasScintillationTransmissionsVisibilityAerosol measurementMODTRANOptical particle countersRemaining differencesscintillometerTransmission experimentsTransmission measurementsTransmissometerAdaptive optics
TNO Identifier
745587
ISSN
0277786X
ISBN
9781510604087
Publisher
SPIE
Article nr.
1000203
Source title
Optics in Atmospheric Propagation and Adaptive Systems XIX. 28 September 2016 through 29 September 2016
Editor(s)
Gonglewski, J.D.
Stein, K.U.
Stein, K.U.
Files
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