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  • 1
    Electronic Resource
    Electronic Resource
    Anomalous fluorescence properties of 4-N,N-dimethylaminobenzoic acid in polar solvents (1992)
    Springer
    Journal of fluorescence 2 (1992), S. 107-115 
    Details
    ISSN: 1573-4994
    Keywords: Fluorescence ; anomalous fluorescence ; 4-N,N-dimethylaminobenzoic acid ; dimerization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract 4-N,N-Dimethylaminobenzoic acid exhibits anomalous fluorescence in polar and hydrogen-bonding solvents. The fluorescence spectra and kinetics suggest that this arises due to the formation of a ground-state dimer or higher polymer. Preliminary measurements in hexane containing small amounts of polar acetonitrile do not rule out the possibility of exciplex formation also occurring.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00867670
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    Paper (German National Licenses)
    Fulltext
  • 2
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    The relationship between the microwave radar cross section and both wind speed and stress: Model function studies using Frontal Air-Sea Interaction Experiment data (1994)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: The Frontal Air-Sea Interaction Experiment (FASINEX) provided a unique data set with coincident airborne scatterometer measurements of the ocean surface radar cross section (RCS)(at Ku band) and near-surface wind and wind stress. These data have been analyzed to study new model functions which relate wind speed and surface friction velocity (square root of the kinematic wind stress) to the radar cross section and to better understand the processes in the boundary layer that have a strong influence on the radar backscatter. Studies of data from FASINEX indicate that the RCS has a different relation to the friction velocity than to the wind speed. The difference between the RCS models using these two variables depends on the polarization and the incidence angle. The radar data have been acquired from the Jet Propulsion Laboratory airborne scatterometer. These data span 10 different flight days. Stress measurements were inferred from shipboard instruments and from aircraft flying at low altitudes, closely following the scatterometer. Wide ranges of radar incidence angles and environmental conditions needed to fully develop algorithms are available from this experiment.
    Keywords: OCEANOGRAPHY
    Type: Journal of Geophysical Research (ISSN 0148-0227); 99; C5; p. 10,087-10,108
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Relating the microwave radar cross section to the sea surface stress - Physics and algorithms (1991)
    In:  Other Sources
    Details
    Publication Date: 2019-08-27
    Description: The FASINEX (Frontal Air-Sea Interaction Experiment) provided a unique data set with coincident airborne measurements of the ocean surface radar cross section (at Ku-band) and surface windstress. It is being analyzed to create new algorithms and to better understand the air-sea variables that can have a strong influence on the RCS (radar cross section). Several studies of portions of data from the FASINEX indicate that the RCS is more dependent on the surface stress than on the wind speed. Radar data have been acquired by the JPL and NRL groups. The data span 12 different flight days. Stress measurements can be inferred from ship-board instruments and from aircraft closely following the scatterometers.
    Keywords: OCEANOGRAPHY
    Type: IGARSS ''91: Annual International Geoscience and Remote Sensing Symposium; Jun 03, 1991 - Jun 06, 1991; Espoo; Finland
    Format: text
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    NASA TECHNICAL REPORTS
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