DID YOU KNOW? DTIC has over 3.5 million final reports on DoD funded research, development, test, and evaluation activities available to our registered users. Click
HERE to register or log in.
Accession Number:
AD1096849
Title:
Characterization of Radiance from the Ocean Surface by Hyperspectral Imaging
Corporate Author:
NAVAL RESEARCH LAB WASHINGTON DC WASHINGTON United States
Report Date:
2019-01-18
Abstract:
A novel snapshot hyperspectral imager is introduced for ocean color OC applications and its capabilities are demonstrated. The instrument provides hyperspectral radiance images with a wide field-of-view FOV and short exposure time. which is valuable for the direct characterization of the wind-roughened surface in various illumination conditions and wind speeds. Uncertainties in the total L-t, sky L-s and derived water- leaving L-w radiances at viewing angles of 20-60 degrees are determined as a function of wind speed together with associated correlation coefficients and variances of the sea surface reflectance coefficient p. Estimated L-w uncertainties can partially explain the inaccuracy of satellite retrievals in the blue bands in the coastal waters. It is shown that in above-water measurements in no-glint conditions with viewing and azimuth angles of 40 degrees and 90 degrees, respectively, for both L-tlambda and L-slambda the impact of FOV is minimal at least up to measured W 5.7 ms for full-angle FOV of 4 degrees and larger. Implications of uncertainties for the derivation of water leaving radiance in above-water ship-borne and AERONET-OC measurements are discussed.
Descriptive Note:
Journal Article - Open Access
Supplementary Note:
Optics Express , 27, 2, 01 Jan 0001, 01 Jan 0001,
Pages:
0019
Distribution Statement:
Approved For Public Release;
File Size:
6.38MB
