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dc.contributor.authorSharma, Puneet
dc.contributor.authorDalin, Peter
dc.contributor.authorMann, Ingrid
dc.date.accessioned2019-11-25T10:23:45Z
dc.date.available2019-11-25T10:23:45Z
dc.date.issued2019
dc.description.abstractIn this paper, we present a framework to study the spatial structure of noctilucent clouds formed by ice particles in the upper atmosphere at mid and high latitudes during summer. We studied noctilucent cloud activity in optical images taken from three different locations and under different atmospheric conditions. In order to identify and distinguish noctilucent cloud activity from other objects in the scene, we employed linear discriminant analysis (LDA) with feature vectors ranging from simple metrics to higher-order local autocorrelation (HLAC), and histogram of oriented gradients (HOG). Finally, we propose a convolutional neural networks (CNN)-based method for the detection of noctilucent clouds. The results clearly indicate that the CNN-based approach outperforms the LDA-based methods used in this article. Furthermore, we outline suggestions for future research directions to establish a framework that can be used for synchronizing the optical observations from ground-based camera systems with echoes measured with radar systems like EISCAT in order to obtain independent additional information on the ice clouds.en_US
dc.descriptionSource at <a href=https://doi.org/10.3390/rs11232743>https://doi.org/10.3390/rs11232743. </a>en_US
dc.identifier.citationSharma, Dalin, Mann. Towards a Framework for Noctilucent Cloud Analysis. Remote Sensing. 2019;11:1-16en_US
dc.identifier.cristinIDFRIDAID 1750783
dc.identifier.doi10.3390/rs11232743
dc.identifier.issn2072-4292
dc.identifier.urihttps://hdl.handle.net/10037/16697
dc.language.isoengen_US
dc.publisherMDPIen_US
dc.relation.journalRemote Sensing
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/FRINATEK/275503/Norway/Mesospheric Dust in the Small Size Limit: Radar Studies, Model Calculations and Supporting Observations//en_US
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/ROMFORSK/262941/Norway/Cosmic dust in the solar-terrestrial physics: exploring the inner heliosphere//en_US
dc.rights.accessRightsopenAccessen_US
dc.subjectVDP::Mathematics and natural science: 400::Physics: 430en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Fysikk: 430en_US
dc.titleTowards a Framework for Noctilucent Cloud Analysisen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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