Path homogeneity along a horizontal line-of-sight path during the FESTER experiment: First results
| Autor: | Faith J. February, Benita Maritz, Willem H. Gunter, A. M. J. van Eijk, Mokete S. Koago, Carl Wainman, M. E. Gardener |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Sea temperature
ED - Electronic Defence Mixed layer Instrumentation ASTD atmospheric path homogeneity Radiometers Refractive index Oceanography Adaptive systems Air temperature law.invention Atmospheric temperature law Surface properties Submarine geophysics Underwater Air-sea temperature difference 2015 Observation Weapon & Protection Systems Infrared radiation Sea surface temperature (SST) Remote sensing TS - Technical Sciences Radiometer Surface waters Atmospheric turbulence Temperature FESTER Temperature distribution Sea surface temperature Geography Scintillometer Meteorological instruments Thermocline Turbulence models |
| Zdroj: | Gonglewski, J.D.Stein, K.U., Optics in Atmospheric Propagation and Adaptive Systems XIX. 28 September 2016 through 29 September 2016, 10002 |
| Popis: | The First European South African Experiment (FESTER) was conducted over about a 10 month period at the Institute of Maritime Technology (IMT) in False Bay, South Africa. One of the important goals was the establishment of the air-sea temperature difference (ASTD) homogeneity along the main propagation link atmospheric path since it is a basic assumption for most of the atmospheric turbulence models (caused by refractive index variations). The ASTD was measured from a small scientific work boat (called Sea Lab) moving along a straight in- and outbound track along the main propagation link path. The air temperature on-board was measured using standard weather sensors, while the sea surface temperature was measured using a long wavelength infrared radiometer, which was compared to the bulk sea temperature half a meter below the sea surface. This was obtained by an under water temperature sensor mounted on a â€surfboard' that was towed alongside Sea Lab. Vertical water temperature profiles were also measured along the main propagation path in order to determine the depth of the surface mixed layer and thermocline using a Conductivity Temperature Depth profiler (CTD). First results investigated the ASTD variation along the horizontal line-of-sight path used by the principal electro-optic transmission link monitoring equipment (i.e. scintillometer and multi-spectral radiometer-transmissometer system). © 2016 SPIE. The Society of Photo-Optical Instrumentation Engineers (SPIE) |
| Databáze: | OpenAIRE |
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