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Detection and Correction of Radiance Variations During Spectral Calibration in APEX

Jehle, Michael and Hueni, Andreas and Lenhard, Karim and Baumgartner, Andreas and Schaepman, Michael E. (2015) Detection and Correction of Radiance Variations During Spectral Calibration in APEX. IEEE Geoscience and Remote Sensing Letters, 12 (5), pp. 1023-1027. IEEE - Institute of Electrical and Electronics Engineers. DOI: 10.1109/LGRS.2014.2374358 ISSN 1545-598X

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Official URL: http://ieeexplore.ieee.org/lpdocs/epic03/wrapper.htm?arnumber=7000531

Abstract

The airborne prism experiment (APEX) is an imaging spectrometer developed by a joint Swiss-Belgian consortium composed of institutes (University of Zurich, Flemish Institute for Technological Research) and industries (RUAG, OIP, Netcetera), supported by the European Space Agency's PRODEX programme. APEX is designed to support the development of future space-borne Earth observation systems by simulating, calibrating or validating existing or planned optical satellite missions. Therefore, periodic extensive calibration of APEX is one major objective within the project. APEX calibration under laboratory conditions is done at its dedicated calibration and characterization facility at the German Aerospace Center (DLR) in Oberpfaffenhofen, Germany. While environmental influences under laboratory conditions are reduced to a minimum, the effects of atmospheric absorption and the properties of the underlying calibration infrastructure may still influence the measurements and subsequently the accuracy of the sensor spectral response estimations. It is demonstrated that even a lightpath of \~2 m through the atmosphere or the monochromator grating can have significant impact on the spectral response estimation of the sensor. A normalization approach described in this letter is able to compensate for these effects. The correction algorithm is exemplarily demonstrated on actual measurements for the short wavelength-IR range channel

Item URL in elib:https://elib.dlr.de/97696/
Document Type:Article
Title:Detection and Correction of Radiance Variations During Spectral Calibration in APEX
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Jehle, MichaelUniv. of Zurich, SwitzerlandUNSPECIFIED
Hueni, AndreasUniv. of Zurich, SwitzerlandUNSPECIFIED
Lenhard, Karimkarim.lenhard (at) dlr.deUNSPECIFIED
Baumgartner, Andreasandreas.baumgartner (at) dlr.deUNSPECIFIED
Schaepman, Michael E.michael.schaepman (at) geo.uzh.chUNSPECIFIED
Date:May 2015
Journal or Publication Title:IEEE Geoscience and Remote Sensing Letters
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:12
DOI :10.1109/LGRS.2014.2374358
Page Range:pp. 1023-1027
Editors:
EditorsEmail
Frery, Alejandro C.acfrery@gmail.com
Publisher:IEEE - Institute of Electrical and Electronics Engineers
Series Name:Geoscience and Remote Sensing Letters, IEEE
ISSN:1545-598X
Status:Published
Keywords:Airborne Prism Experiment (APEX), CHB, atmospheric absorption,calibration,measurement setup,radiance,spectral
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: Baumgartner, Andreas
Deposited On:31 Jul 2015 16:24
Last Modified:31 Jul 2019 19:54

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