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Impact of improved calibration of a NEO HySpex VNIR-1600 sensor on remote sensing of water depth

Lenhard, Karim and Baumgartner, Andreas and Gege, Peter and Nevas, Saulius and Nowy, Stefan and Sperling, Armin (2015) Impact of improved calibration of a NEO HySpex VNIR-1600 sensor on remote sensing of water depth. IEEE Transactions on Geoscience and Remote Sensing, 53 (11), pp. 6085-6098. IEEE - Institute of Electrical and Electronics Engineers. DOI: 10.1109/TGRS.2015.2431743 ISSN 0196-2892

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Official URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=7115112

Abstract

This paper investigates at the example of bathymetry how much an application can profit from comprehensive characterisations required for an improved calibration of data from a state-of-the-art commercial hyperspectral sensor. A NEO HySpex VNIR-1600 sensor is used for this study, and the improvements are based on measurements of sensor properties not covered by the manufacturer, in particular detector nonlinearity and stray light. This additional knowledge about the instrument is used to implement corrections for nonlinearity, stray light, spectral smile distortion and nonuniform spectral bandwidth and to base the radiometric calibration on a SI-traceable radiance standard. Bathymetry is retrieved from a data take from the lake Starnberg using WASI-2D. The results using the original and improved calibration procedures are compared to ground reference data, with an emphasis on the effect of stray light correction. For our instrument, stray light biases the detector response from 416 - 500 nm up to 8 % and from 700 - 760 nm up to 5 %. Stray light induced errors affect bathymetry mainly in water deeper than Secchi depth, while in shallower water the dominant error source is the calibration accuracy of the light source used for radiometric calibration. Stray light correction reduced the systematic error of water depth by 19 % from Secchi depth to three times Secchi depth, while the relative standard deviation remained stable at 5 %.

Item URL in elib:https://elib.dlr.de/95171/
Document Type:Article
Title:Impact of improved calibration of a NEO HySpex VNIR-1600 sensor on remote sensing of water depth
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Lenhard, Karimkarim.lenhard (at) dlr.deUNSPECIFIED
Baumgartner, Andreasandreas.baumgartner (at) dlr.deUNSPECIFIED
Gege, Peterpeter.gege (at) dlr.deUNSPECIFIED
Nevas, Sauliussaulius.nevas (at) ptb.deUNSPECIFIED
Nowy, Stefanstefan.nowy (at) ptb.deUNSPECIFIED
Sperling, Arminarmin.sperling (at) ptb.deUNSPECIFIED
Date:2015
Journal or Publication Title:IEEE Transactions on Geoscience and Remote Sensing
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:53
DOI :10.1109/TGRS.2015.2431743
Page Range:pp. 6085-6098
Editors:
EditorsEmail
Plaza, Antonio J.aplaza@unex.es
Publisher:IEEE - Institute of Electrical and Electronics Engineers
ISSN:0196-2892
Status:Published
Keywords:Hyperspectral, imaging spectrometer, remote sensing, calibration, stray light, nonlinearity, bathymetry, HySpex
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: Lenhard, Karim
Deposited On:11 Feb 2015 10:10
Last Modified:08 Mar 2018 18:34

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