Effect of ship shadow on in-water irradiance measurements

• Autorzy: Piskozub J.
• Języki publikacji: EN

Abstrakty

EN

Calculations of the effect of the ship's shadow on in-water irradiance measurement errors were performed with a Monte Carlo radiance transfer algorithm. The algorithm contained the Cox-Munk wave-slope probability function. A simple 3-D model of the rectangular underwater part of a ship was used. The effect was calculated as a function of sea-water absorption, surface roughness (depending on an assumed wind velocity of up to 15 m s-1) with various wind velocities and directions, length and depth of the ship, distance of instrument from the ship, and bow-to-sun angle.

Słowa kluczowe

EN

marine optics; instrumental effects; irradiance; self-shading

• Wydawca: Polish Academy of Sciences, Institute of Oceanology ; Elsevier
• Czasopismo: Oceanologia
• Rocznik: 2004
• Tom: No. 46 (1)
• Strony: 103--112
• Opis fizyczny: Bibliogr. 14 poz., wykr.

Twórcy

autor

Piskozub J.

• Institute of Oceanology, Polish Academy of Sciences, Powstańców Warszawy 55, PL-81-712 Sopot, Poland,

Bibliografia

• [1] Aas E., Korsbø B., 1997, Self-shading effect by radiance meters on upward radiance observed in coastal waters, Limnol. Oceanogr., 42 (5), 968-974.
• [2] Cox C., Munk W. H., 1956, Slopes of the sea surface deduced from photographs of sun glitter, Bull. Scripps Inst. Oceanogr., 6 (9), 401-488.
• [3] Dera J., 1992, Marine physics, Elsevier, Amsterdam, 516 pp.
• [4] Doyle J. P., Zibordi G., 2002, Optical propagation within a three-dimensional shadowed atmosphere-ocean field: application to large deployment structures, Appl. Opt., 41 (21), 4283-4306.
• [5] Gordon H. R., 1985, Ship perturbation of irradiance measurements at sea. 1. Monte Carlo simulations, Appl. Opt., 24 (23), 4172-4182.
• [6] Gordon H. R., Ding K., 1992, Self-shading of in-water optical instruments, Limnol. Oceanogr., 37 (3), 491-500.
• [7] Kattawar G. W., Plass G. N., 1972, Radiative transfer in the Earth’s atmosphere-ocean system. II. Radiance in atmosphere and ocean, J. Phys. Oceanogr., 2, 146-156.
• [8] Leathers R. A., Downes T. V., 2001, Self-shading correction for upwelling sea-surface radiance measurements made with buoyed instruments, Opt. Express, 8 (10), 561-570.
• [9] Lenoble J. (ed.), 1985, Radiative transfer in scattering and absorbing atmospheres: standard computational procedures, A. Deepak Publ., Hampton, VA, 300 pp.
• [10] Petzold J. T., 1972, Volume scattering functions for selected ocean waters, SIO Ref. 72-78, Scripps Inst. Oceanogr., Univ. California, San Diego, 79 pp.
• [11] Piskozub J., 1994, Effects of surface waves and sea-bottom on self-shading of inwater optical instruments, Proc. SPIE, 2258, 300-308.
• [12] Piskozub J., 1998, Influence of instrument casing shape on self-shading of in-water radiation, Proc. 14th Conf. Ocean Optics, 10-13 November 1998, Kailua-Kona (Hawaii).
• [13] Piskozub J., Weeks A. R., Schwarz J. N., Robinson I. S., 2000, Self-shading of upwelling irradiance for an instrument with sensors on a sidearm, Appl. Opt., 39 (12), 1872-1878.
• [14] Zibordi G., Doyle J. P., Hooker S. B., 1999, Offshore tower shading effects on in-water optical measurements, J. Atmos. Ocean. Technol., 16 (11), Part 2, 1767-1779.