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Investigations on the capability of CHRIS-PROBA for monitoring of water constituents in Lake Constance compared to MERIS

Miksa, Sabine and Gege, Peter and Heege, Thomas (2004) Investigations on the capability of CHRIS-PROBA for monitoring of water constituents in Lake Constance compared to MERIS. In: Proceedings of the Second Workshop CHRIS/Proba, ESA SP-578, July 2004 (CD-ROM), pp. 162-171. ESA Publications Division. 2nd ESA CHRIS/Proba Workshop, Frascati, 28-30 Apr 2004. ISBN 92-9092-889-1.

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Abstract

CHRIS-PROBA data were acquired at 3 days in 2003 at the Eastern part of Lake Constance. Field campaigns were organised at these days in order to measure optical parameters of the water and the atmosphere and concentrations of water constituents from ship for validation. For two dates also MERIS full-resolution data are available. Based on the in-situ measurements, forward calculations were made to simulate for different conditions the expected CHRIS and MERIS top-of-atmosphere radiance spectra. The result is a comparison of CHRIS with MERIS and with simulated radiances. CHRIS spectra were reproduced in a satisfying way whereas MERIS spectra are disappointingly misaligned and have to be recalculated to exclude miscalculation as the source of this error. Further, the calculated spectra were adjusted to the measured ones by fitting the concentrations of 3 aerosol types (rural, maritime, urban) and 3 water constituents (suspended matter, chlorophyll, Gelbstoff). The values for concentrations of suspended matter and Gelbstoff have a mean relative difference of 16% and 26% respectively which is within the error margin of in-situ data, chlorophyll concentrations have a mean relative difference of 47%. All calculations were done using the modular inversion program MIP, which is being developed at DLR for processing multispectral and hyperspectral images from surface waters.

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=2004,
Title:Investigations on the capability of CHRIS-PROBA for monitoring of water constituents in Lake Constance compared to MERIS
Authors:
AuthorsInstitution or Email of Authors
Miksa, SabineUNSPECIFIED
Gege, PeterUNSPECIFIED
Heege, ThomasUNSPECIFIED
Date:2004
Journal or Publication Title:Proceedings of the Second Workshop CHRIS/Proba
Volume:ESA SP-578, July 2004 (CD-ROM)
Page Range:pp. 162-171
Editors:
EditorsEmail
Lacoste, H.UNSPECIFIED
Publisher:ESA Publications Division
ISBN:92-9092-889-1
Status:Published
Keywords:CHRIS-PROBA, monitoring, water constituents
Event Title:2nd ESA CHRIS/Proba Workshop, Frascati, 28-30 Apr 2004
Organizer:ESA
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):UNSPECIFIED
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute
Deposited By: Cornelia Roehl
Deposited On:27 Jan 2006
Last Modified:06 Jan 2010 22:26

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