Accession Number : ADA187609

Title :   Remote Sensing of Atmospheric Optical Thickness and Sea-Water Attenuation When Submerged: Wavelength Selection and Anticipated Errors.

Descriptive Note : Final rept. 1 Jul 78-30 Apr 86,

Corporate Author : SCRIPPS INSTITUTION OF OCEANOGRAPHY LA JOLLA CA VISIBILITY LAB

Personal Author(s) : Petzold, T J ; Austin, R W

PDF Url : ADA187609

Report Date : Jul 1987

Pagination or Media Count : 84

Abstract : Prior analysis and experimentation has provided strong support for determining the attenuation of optical radiation for the atmosphere and the water column above a submerged platform by measuring the absolute downwelling irradiance at two wavelengths. The technique requires knowing the two irradiance values and also: 1) the spectral irradiance of the sun outside the atmosphere; 2) the solar zenith angle; and 3) the depth at which the irradiances ae measured. With this capability in hand, the questions considered in this report are which wavelengths to use and the effect of errors in the measurement of irradiance and other parameters. Keywords: Light transmission; Atmospheric attenuation; Sea-water attenuation.

Descriptors :   *RADIATION ATTENUATION, *LIGHT TRANSMISSION, *PHOTOMETERS, ATMOSPHERIC ATTENUATION, ELECTROMAGNETIC RADIATION, FREQUENCY, MEASUREMENT, OPTICAL PROPERTIES, PLATFORMS, RADIANCE, REMOTE DETECTORS, SEA WATER, SELECTION, SPECTRA, SUN, UNDERWATER, WATER, EARTH ATMOSPHERE, THICKNESS, SOLAR RADIATION, RADIOMETRY, DIFFUSIVITY, CALIBRATION, ERRORS

Subject Categories : Optics
      Physical and Dynamic Oceanography
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE