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Spectral and radiometric measurement requirements for inland, coastal and reef waters

Gege, Peter and Dekker, Arnold G. (2020) Spectral and radiometric measurement requirements for inland, coastal and reef waters. Remote Sensing, 12 (14), 2247_1-2247_26. Multidisciplinary Digital Publishing Institute (MDPI). doi: 10.3390/rs12142247. ISSN 2072-4292.

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Official URL: https://www.mdpi.com/2072-4292/12/14/2247

Abstract

This paper studies the measurement requirements of spectral resolution and radiometric sensitivity to enable the quantitative determination of water constituents and benthic parameters for the majority of optically deep and optically shallow waters on Earth. The spectral and radiometric variability is investigated by simulating remote sensing reflectance (Rrs) spectra of optically deep water for twelve inland water scenarios representing typical and extreme concentration ranges of phytoplankton, colored dissolved organic matter and non-algal particles. For optically shallow waters, Rrs changes induced by variable water depth are simulated for fourteen bottom substrate types, from lakes to coastal waters and coral reefs. The required radiometric sensitivity is derived for the conditions that the spectral shape of Rrs should be resolvable with a quantization of 100 levels and that measurable reflection differences at at least one wavelength must occur at concentration changes in water constituents of 10% and depth differences of 20 cm. These simulations are also used to derive the optimal spectral resolution and the most sensitive wavelengths. Finally, the Rrs spectra and their changes are converted to radiances and radiance differences in order to derive sensor (noise-equivalent radiance) and measurement requirements (signal-to-noise ratio) at the water surface and at the top of the atmosphere for a range of solar zenith angles.

Item URL in elib:https://elib.dlr.de/135580/
Document Type:Article
Title:Spectral and radiometric measurement requirements for inland, coastal and reef waters
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Gege, Peterpeter.gege (at) dlr.dehttps://orcid.org/0000-0003-0939-5267
Dekker, Arnold G.CSIRO; AustraliaUNSPECIFIED
Date:13 July 2020
Journal or Publication Title:Remote Sensing
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:12
DOI :10.3390/rs12142247
Page Range:2247_1-2247_26
Publisher:Multidisciplinary Digital Publishing Institute (MDPI)
ISSN:2072-4292
Status:Published
Keywords:remote sensing; inland water; phytoplankton; colored dissolved organic matter (CDOM); non-algal particles; shallow water; coral reef; reflectance; spectral resolution; radiometric sensitivity, WASI
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):Vorhaben Spectroscopic Methods in Remote Sensing (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > Experimental Methods
Deposited By: Gege, Dr.rer.nat. Peter
Deposited On:21 Jul 2020 15:22
Last Modified:18 Mar 2021 18:29

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