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Design Considerations for an Aquatic Ecosystem Imaging Spectrometer: Results of a CEOS Feasibility Study

Dekker, Arnold and Gege, Peter and Pinnel, Nicole and Briottet, Xavier and Peters, Steef W. M. and Sterckx, Sindy and Turpie, Kevin and Giardino, Claudia and Botha, Elisabeth and Costa, Maycira and Bergeron, Martin and Pahlevan, Nima and Heege, Thomas and Court, Andy and Brando, Vittorio (2017) Design Considerations for an Aquatic Ecosystem Imaging Spectrometer: Results of a CEOS Feasibility Study. 68th International Astronautical Congress (IAC), 25.-29.September 2017, Adelaide, Australia.

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Abstract

Many Earth observing sensors have been designed, built and launched with primary objectives of either terrestrial or ocean remote sensing applications. Often the data from these sensors are also used for freshwater, estuarine and coastal water quality observations and bathymetry and benthic mapping. However, such land and ocean specific sensors are not designed for these complex aquatic environments and consequently are not likely to perform as well as a dedicated sensor would. As a CEOS action, CSIRO and DLR have taken the lead on a feasibility assessment to determine the benefits and technological difficulties of designing an Earth observing satellite mission focused on the biogeochemistry of inland, estuarine, deltaic and near coastal waters as well as mapping macrophytes, macro-algae, sea grasses and coral reefs. These environments need higher spatial resolution than current and planned ocean colour sensors offer and need higher spectral resolution than current and planned land Earth observing sensors offer (with the exception of several R&D type imaging spectrometry satellite missions). The results indicate that a dedicated sensor of (non-oceanic) aquatic ecosystems could be a multispectral sensor with ~26 bands in the 380-780 nm wavelength range for retrieving the aquatic ecosystem variables as well as another 15 spectral bands between 360-380 nm and 780-1400 nm for removing atmospheric and air-water interface effects. These requirements are very close to defining an imaging spectrometer with spectral bands between 360 and 1000 nm (suitable for Si based detectors), possibly augmented by a SWIR imaging spectrometer. In that case the spectral bands would ideally have 5 nm spacing and FWHM, although it may be necessary to go to 8 nm wide spectral bands (between 380 to 780nm where the fine spectral features occur -mainly due to photosynthetic or accessory pigments) to obtain enough signal to noise. The spatial resolution of such a global mapping mission would be between ~17 and ~33 m enabling imaging of the vast majority of water bodies (lakes, reservoirs, lagoons, estuaries etc.) large than 0.2 ha and ~25% of river reaches globally (at ~17 m resolution) whilst maintaining sufficient radiometric resolution.

Item URL in elib:https://elib.dlr.de/115821/
Document Type:Conference or Workshop Item (Speech)
Title:Design Considerations for an Aquatic Ecosystem Imaging Spectrometer: Results of a CEOS Feasibility Study
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Dekker, Arnoldcsiro; australiaUNSPECIFIED
Gege, Peterpeter.gege (at) dlr.dehttps://orcid.org/0000-0003-0939-5267
Pinnel, NicoleNicole.Pinnel (at) dlr.dehttps://orcid.org/0000-0003-1978-3204
Briottet, XavieroneraUNSPECIFIED
Peters, Steef W. M.water insightUNSPECIFIED
Sterckx, SindyVITO, BelgiumUNSPECIFIED
Turpie, KevinNASA, USAUNSPECIFIED
Giardino, Claudiacnr, italyUNSPECIFIED
Botha, ElisabethCSIRO, AustraliaUNSPECIFIED
Costa, Maycirauniversity of victoria, canadaUNSPECIFIED
Bergeron, MartinCSA, CanadaUNSPECIFIED
Pahlevan, NimaNASA, USAUNSPECIFIED
Heege, Thomaseomap gmbh & co. kg, germanyUNSPECIFIED
Court, Andytno, the netherlandsUNSPECIFIED
Brando, Vittoriocnr, italyUNSPECIFIED
Date:2017
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Earth observation, aquatic ecosystems, multispectral remote sensing, imaging spectrometry, optical sensor specifications, environmental applications
Event Title:68th International Astronautical Congress (IAC)
Event Location:Adelaide, Australia
Event Type:international Conference
Event Dates:25.-29.September 2017
Organizer:Space Industry Association of Australia (SIAA)
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 - Remote sensing and geoscience, R - Vorhaben hochauflösende Fernerkundungsverfahren
Location: Oberpfaffenhofen
Institutes and Institutions:German Remote Sensing Data Center > Land Surface
Remote Sensing Technology Institute > Experimental Methods
Deposited By: Pinnel, Dr.rer.nat Nicole
Deposited On:23 Nov 2017 10:31
Last Modified:31 Jul 2019 20:13

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