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Method Analysis for Collecting and Processing in-situ Hyperspectral Needle Reflectance Data for Monitoring Norway Spruce

Einzmann, Kathrin and Wai-Tim, Ng and Immitzer, Markus and Bachmann, Martin and Pinnel, Nicole and Atzberger, Clement (2014) Method Analysis for Collecting and Processing in-situ Hyperspectral Needle Reflectance Data for Monitoring Norway Spruce. Photogrammetrie Fernerkundung Geoinformation (5), 0423-0434. E. Schweizerbartsche Verlagsbuchhandlung. DOI: 10.1127/1432-8364/2014/0234 ISSN 1432-8364

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Forest damage induced by bark beetle attacks can cause major economic losses in forest- ry. Hyperspectral remote sensing data and state of the art very high spatial resolution satellite data of- fer a great potential for assessing tree vitality. How- ever, a better understanding of the effects of vitality decrease and its impact on the spectral behaviour of needles is needed. Filling this knowledge gap can make a significant contribution to improve the in- terpretation of remote sensing data. However, it is still unclear which method for needle spectra col- lection is most suitable. In this work, two methods for spectral reflectance measurements of Norway spruce needles using portable spectroradiometers were tested and analysed: using a classical fore op- tic and a so-called contact probe. The spectral re- flectance data were evaluated with different statis- tical similarity measure techniques. Besides ana- lysing the measurements themselves, the methods were compared in terms of their practicality. Fur- thermore, the impact of storage on the reflection behaviour was investigated. The spectral measure- ments were performed in the field as well as in a laboratory and repeated three times during the 2013 growing season. Based on the obtained results we recommend measuring needle samples with the contact probe of portable spectroradiometers.

Item URL in elib:https://elib.dlr.de/91376/
Document Type:Article
Title:Method Analysis for Collecting and Processing in-situ Hyperspectral Needle Reflectance Data for Monitoring Norway Spruce
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Einzmann, KathrinBoKu WienUNSPECIFIED
Immitzer, MarkusBoKu WienUNSPECIFIED
Bachmann, Martinmartin.bachmann (at) dlr.deUNSPECIFIED
Pinnel, Nicolenicole.pinnel (at) dlr.deUNSPECIFIED
Atzberger, ClementBoKu WienUNSPECIFIED
Date:October 2014
Journal or Publication Title:Photogrammetrie Fernerkundung Geoinformation
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
DOI :10.1127/1432-8364/2014/0234
Page Range:0423-0434
Publisher:E. Schweizerbartsche Verlagsbuchhandlung
Keywords:in-situ measurements, needle spectra, Norway spruce, portable spectroradiometer, tree vitality, hyperspectral
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 Fernerkundung der Landoberfläche (old)
Location: Oberpfaffenhofen
Institutes and Institutions:German Remote Sensing Data Center > Land Surface
Deposited By: Bachmann, Dr.rer.nat. Martin
Deposited On:06 Nov 2014 09:40
Last Modified:08 Mar 2018 18:48

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