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    A feasibility study for a remote laser water turbidity meter (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A technique to remotely determine the attenuation coefficient (alpha) of the water was investigated. The backscatter energy (theta = 180 deg) of a pulse laser (lambda = 440 - 660 nm) was found directly related to the water turbidity. The greatest sensitivity was found to exist at 440 nm. For waters whose turbidity was adjusted using Chesapeake Bay sediment, the sensitivity in determining alpha at 440 nm was found to be approximately 5 - 10%. A correlation was also found to exist between the water depth (time) at which the peak backscatter occurs and alpha.
    Keywords: MASERS
    Type: NASA-CR-132376
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Application of a pulsed laser for measurements of bathymetry and algal fluorescence. (1973)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The technique of measuring water depths with an airborne pulsed dye laser is studied, with emphasis on the degrading effect of some environmental and operational parameters on the transmitted and reflected laser signals. Extrapolation of measurements of laser stimulated fluorescence, performed as a function of both the algal cell concentration and the distance between the algae and the laser/receiver, indicate that a laser system operating from a height of 500 m should be capable of detecting chlorophyll concentrations as low as 1.0 mg/cu m.-
    Keywords: MASERS
    Type: International Symposium on Remote Sensing of Environment; Oct 02, 1972 - Oct 06, 1972; Ann Arbor, MI
    Format: text
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    NASA TECHNICAL REPORTS
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