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A spectral model for correcting sunglint and skyglint

Gege, Peter and Grötsch, Philipp (2016) A spectral model for correcting sunglint and skyglint. In: Proceedings of Ocean Optics XXIII 2016, pp. 1-10. Ocean Optics XXIII, 23.-28. Okt. 2016, Victoria, Kanada.

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Abstract

Specular reflections of the sun and the sky at the water surface (sunglint, skyglint) can be of comparable intensity or even much higher as the water leaving radiance, even for observation geometries minimizing the sunglint. A number of approaches have been developed for correcting these glint signals, practically all based on the near infrared spectral signature, but none of them is working reliably under all conditions. Challenges are the determination of the actual glint intensity and its wavelength dependency. The wavelength dependency of the reflected radiance (Lr) differs in general significantly from that of the downwelling irradiance (Ed), hence the ratio Lr/Ed is not a constant, but has a characteristic spectral signature that is mainly determined by scattering in the atmosphere. An analytic model has been developed describing intensity and wavelength dependency of sunglint and skyglint with few parameters. It has been implemented into the publicly available software WASI for forward simulation and inverse modeling of radiance and reflectance measurements. The ambiguity of parameter determination during inversion is discussed, and results from applying the model to field measurements are presented.

Item URL in elib:https://elib.dlr.de/108100/
Document Type:Conference or Workshop Item (Poster)
Title:A spectral model for correcting sunglint and skyglint
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Gege, PeterUNSPECIFIEDUNSPECIFIED
Grötsch, PhilippVU University AmsterdamUNSPECIFIED
Date:October 2016
Journal or Publication Title:Proceedings of Ocean Optics XXIII 2016
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 1-10
Status:Published
Keywords:Remote sensing, water, sunglint, skyglint
Event Title:Ocean Optics XXIII
Event Location:Victoria, Kanada
Event Type:international Conference
Event Dates:23.-28. Okt. 2016
Organizer:IOCCG
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Spektrometrische Verfahren und Konzepte der Fernerkundung (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > Experimental Methods
Deposited By: Gege, Dr.rer.nat. Peter
Deposited On:23 Nov 2016 12:05
Last Modified:31 Jul 2019 20:05

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