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The hyperspectral sensors DESIS for aquatic ecosystems monitoring - a sensitivity study

Pinnel, Nicole and Gege, Peter and Göritz, Anna (2019) The hyperspectral sensors DESIS for aquatic ecosystems monitoring - a sensitivity study. 11th Earsel SIG IS Workshop, 06.-08. Feb. 2019, Brno, Czech Rebublic.

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Abstract

The aquatic ecosystems of coastal and inland waters are more variable than the open ocean as water constituents and bottom substrates differ considerably in type, concentration and optical properties. Sensors with high spatial, spectral and radiometric resolution are therefore required to provide enough detail for mapping these highly complex environments. Two new hyperspectral Earth observation instruments, designed for monitoring spectrally complex areas, are the DLR Earth Sensing Imaging Spectrometer (DESIS) and the Environmental Mapping and Analysis Program (EnMAP). These hyperspectral sensors both cover a spectral range from 420 nm to 1000 nm in VNIR (and 900 nm -2450 nm in SWIR for EnMAP) and have a spatial resolution of 30 meters. DESIS was already launched to the ISS in summer 2018, EnMAP’s launch date will be in 2020. The goal of the present study is to specifically evaluate the performance of DESIS and EnMAP over aquatic ecosystems based on their sensor specifications. For this purpose, a sensitivity study was conducted in order to explore the spectral and radiometric properties of DESIS and EnMAP in the context of optically deep and shallow water mapping. The optical water properties and benthic cover types were chosen to represent typical inland and coastal waters. Forward simulations of hyperspectral measurements were made using the Water Color Simulator software WASI to study the expected DESIS and EnMAP radiances and their signal-to-noise ratios (SNR) for different atmospheric conditions. The impact of sensor noise on the retrieval of water constituents, benthos types and water depth was analyzed by applying inverse modelling to these reflectance spectra. The study assesses the mapping potential and limitations of a DESIS and EnMAP type sensor for these complex environments, which are usually much darker than land surfaces.

Item URL in elib:https://elib.dlr.de/126569/
Document Type:Conference or Workshop Item (Speech)
Title:The hyperspectral sensors DESIS for aquatic ecosystems monitoring - a sensitivity study
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Pinnel, NicoleNicole.Pinnel (at) dlr.dehttps://orcid.org/0000-0003-1978-3204
Gege, Peterpeter.gege (at) dlr.dehttps://orcid.org/0000-0003-0939-5267
Göritz, AnnaAnna.Goeritz (at) dlr.deUNSPECIFIED
Date:6 February 2019
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:DESIS, sensitivity study, hyperspectral, aquatic ecosystem
Event Title:11th Earsel SIG IS Workshop
Event Location:Brno, Czech Rebublic
Event Type:international Conference
Event Dates:06.-08. Feb. 2019
Organizer:EARSeL and CzechGlobe
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 Dynamics
Remote Sensing Technology Institute > Experimental Methods
Deposited By: Pinnel, Dr.rer.nat Nicole
Deposited On:10 Apr 2019 13:00
Last Modified:31 Jul 2019 20:24

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