API src

Found 449 results.

Related terms

Probabilistische Baugrundmodellierung für Planung und Entwicklung von Offshore-Windparks

Fraunhofer IWES steht mit seinen F&E-Aktivitäten für eine Beschleunigung des Ausbaus der Windenergie auf See. Das betrifft die Untergrunderkundung ebenso wie die Aufbereitung & Bereitstellung von Baugrundparametern für das technische Design von Offshore-Gründungsstrukturen. IWES hat im Anschluss an die Entwicklung seismischer Erkundungsmethoden einen Workflow für die integrierte Interpretation der geophysikalischen & geotechnischen Daten entwickelt, und A. um Bodenprofile relevanter Parameter an Lokationen ohne direkte Baugrundaufschlüsse zu erzeugen (synthetische CPT). Der Bedarf an innovativen Lösungen im Bereich der Baugrundmodellierung besteht, wie letzte Ausschreibungen von Behörden wie RVO (= Rijksdienst voor Ondernemend Nederland) & d. BSH zeigen. Statistische Analysen sind gefordert, um eine reguläre Nutzung synthetischer Baugrundprofile durch Einsatz zertifizierten Analysewerkzeugs zu ermöglichen. IWES & GuD stellen sich der Herausforderung, anknüpfend an existierende geostatistische Methoden, ein probabilistisches Baugrundmodell zu entwickeln. Dadurch wird eine Quantifizierung aller mit der Beschreibung des Baugrundes assoziieren Unsicherheiten (z.B. Heterogenität des Baugrundes, Messunsicherheiten usw.) erreicht, so dass im Ergebnis an jedem Modellpunkt bemessungsrelevanten Baugrundparameter 'mit Sicherheiten behaftet' abgeleitet werden können. Dazu sind sämtliche input-Größen in das Modell mit Streuungen zu integrieren. Das umfasst geophysikalische & geotechnische Mess- & Versuchsergebnisse sowie Modellunsicherheiten in interpolierten Bereichen. Eine umfassende statistische Analyse aller seismischen & geotechnische Informationen soll es ermöglichen, laterale Änderungen der relevanten geotechnischen Parameter zu quantifizieren. Geplant ist ein dreijähriges Forschungsprojekt durch Fraunhofer IWES & GuD Geotechnik und Dynamik Consult GmbH, mit begleitender Industrie-Arbeitskreis (EnBW, G-tec S.A., Ocean Floor Geophysics, Niedersachsenwasser, BSH und BAW)

Higher frequency data products of the International Monitoring System’s infrasound stations

This dataset consists of data products derived from broadband signal detection lists that have been processed for the certified infrasound stations of the International Monitoring System. More specifically, within the CTBT-relevant infrasound range (around 0.01-4 Hz), this dataset covers higher frequencies (1-3 Hz) and is therefore called the ‘hf’ product. The temporal resolution (time step and window length) is 5 min. For processing the infrasound data, the Progressive Multi-Channel Correlation (PMCC) array processing algorithm with a one-third octave frequency band configuration between 0.01 and 4 Hz has been used. The detected signals from the most dominant directions in terms of number of arrivals within a time window and the product-specific frequency range are summarized at predefined time steps. Along with several detection parameters such as the back azimuth, apparent velocity, or mean frequency, additional quantities for assessing the relative quality of the detection parameters are provided. The dataset is available as a compressed .zip file containing the yearly data products (.nc files, NetCDF format) of all certified stations (since 2003). Further information on the processing and details about the open-access data products can be found in: Hupe et al. (2022), IMS infrasound data products for atmospheric studies and civilian applications, Earth System Science Data, doi:10.5194/essd-14-4201-2022

PANGAEA

PANGAEA - Data Publisher for Earth & Environmental Sciences has an almost 30-year history as an open-access library for archiving, publishing, and disseminating georeferenced data from the Earth, environmental, and biodiversity sciences. Originally evolving from a database for sediment cores, it is operated as a joint facility of the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI) and the Center for Marine Environmental Sciences (MARUM) at the University of Bremen. PANGAEA holds a mandate from the World Meteorological Organization (WMO) and is accredited as a World Radiation Monitoring Center (WRMC). It was further accredited as a World Data Center by the International Council for Science (ICS) in 2001 and has been certified with the Core Trust Seal since 2019. The successful cooperation between PANGAEA and the publishing industry along with the correspondent technical implementation enables the cross-referencing of scientific publications and datasets archived as supplements to these publications. PANGAEA is the recommended data repository of numerous international scientific journals.

Deep OCean Test ARray DOCTAR (OBS part)

This is the first deployment of a teleseismic broadband array consisting of 12 three-component stations with an aperture of about 50 km in the deep ocean in about 5000 m water depth. The data can be compared with two other deployments on Madeira and in western Portugal mainland which had similar array layouts and recording time spans (network Y7). The broadband data enable furthermore analysis of the crust and upper mantle beneath the array near to the Gloria fault, a major transform fault in the North Atlantic. Recordings of numerous local and regional earthquakes make a precise location of active structures possible. Waveform data is available from the GEOFON data centre, under network code 3J.

Very low frequency data products of the International Monitoring System’s infrasound stations

This dataset consists of data products derived from broadband signal detection lists that have been processed for the certified infrasound stations of the International Monitoring System. More specifically, this dataset, called the ‘maw’ product, covers a very low frequency range of infrasound (0.02-0.07 Hz). The temporal resolution (time step and window length) is 30 min. For processing the infrasound data, the Progressive Multi-Channel Correlation (PMCC) array processing algorithm with a one-third octave frequency band configuration between 0.01 and 4 Hz has been used. The detected signals from the most dominant directions in terms of number of arrivals within a time window and the product-specific frequency range are summarized at predefined time steps. Along with several detection parameters such as the back azimuth, apparent velocity, or mean frequency, additional quantities for assessing the relative quality of the detection parameters are provided. The dataset is available as a compressed .zip file containing the yearly data products (.nc files, NetCDF format) of all certified stations (since 2003). Further information on the processing and details about the open-access data products can be found in: Hupe et al. (2022), IMS infrasound data products for atmospheric studies and civilian applications, Earth System Science Data, doi:10.5194/essd-14-4201-2022.

Microbarom low-frequency data products of the International Monitoring System’s infrasound stations

This dataset consists of data products derived from broadband signal detection lists that have been processed for the certified infrasound stations of the International Monitoring System. More specifically, this dataset covers the dominant frequency range of microbaroms (0.15-0.35 Hz) and is therefore called the ‘mb_lf’ product. The temporal resolution (time step and window length) is 15 min. For processing the infrasound data, the Progressive Multi-Channel Correlation (PMCC) array processing algorithm with a one-third octave frequency band configuration between 0.01 and 4 Hz has been used. The detected signals from the most dominant directions in terms of number of arrivals within a time window and the product-specific frequency range are summarized at predefined time steps. Along with several detection parameters such as the back azimuth, apparent velocity, or mean frequency, additional quantities for assessing the relative quality of the detection parameters are provided. The dataset is available as a compressed .zip file containing the yearly data products (.nc files, NetCDF format) of all certified stations (since 2003). Further information on the processing and details about the open-access data products can be found in: Hupe et al. (2022), IMS infrasound data products for atmospheric studies and civilian applications, Earth System Science Data, doi:10.5194/essd-14-4201-2022

Microbarom high-frequency data products of the International Monitoring System’s infrasound stations

This dataset consists of data products derived from broadband signal detection lists that have been processed for the certified infrasound stations of the International Monitoring System. More specifically, this dataset covers, among other phenomena, the upper frequency range of microbaroms (0.45-0.65 Hz) and is therefore called the ‘mb_hf’ product. The temporal resolution (time step and window length) is 15 min. For processing the infrasound data, the Progressive Multi-Channel Correlation (PMCC) array processing algorithm with a one-third octave frequency band configuration between 0.01 and 4 Hz has been used. The detected signals from the most dominant directions in terms of number of arrivals within a time window and the product-specific frequency range are summarized at predefined time steps. Along with several detection parameters such as the back azimuth, apparent velocity, or mean frequency, additional quantities for assessing the relative quality of the detection parameters are provided. The dataset is available as a compressed .zip file containing the yearly data products (.nc files, NetCDF format) of all certified stations (since 2003). Further information on the processing and details about the open-access data products can be found in: Hupe et al. (2022), IMS infrasound data products for atmospheric studies and civilian applications, Earth System Science Data, doi:10.5194/essd-14-4201-2022

WAVEOBS

The WAVEOBS project was established with three primary goals; to get a better fundamental understanding of microseism sources in the north-east Atlantic near Ireland; to investigate the use of ocean generated microseisms as real time ocean wave height data; and to investigate their use as a climate proxy. Waveform data is available from the GEOFON data centre, under network code 4V, and is fully open.

INSPIRE: Marine seismic survey profiles for the German EEZ (MSSP-EEZ)

During the period from 1996 to 2007 five cruises operated by BGR acquired seismic lines from the German EEZ. The aim of these expeditions was a detailed survey of the geological structure of the seabed from the North Sea and Baltic Sea. The five GML files (for each cruise one) together with a Readme.txt file are provided in ZIP format (MSSP-EEZ-INSPIRE.zip). The Readme.text file (German/English) contains detailed information on the GML files content. Data transformation was proceeded by using the INSPIRE Solution Pack for FME according to the INSPIRE requirements.

Probabilistische Baugrundmodellierung für Planung und Entwicklung von Offshore-Windparks, Teilvorhaben: Daten und Modelle

Fraunhofer IWES steht mit seinen F&E-Aktivitäten für eine Beschleunigung des Ausbaus der Windenergie auf See. Das betrifft die Untergrunderkundung ebenso wie die Aufbereitung & Bereitstellung von Baugrundparametern für das technische Design von Offshore-Gründungsstrukturen. IWES hat im Anschluss an die Entwicklung seismischer Erkundungsmethoden einen Workflow für die integrierte Interpretation der geophysikalischen & geotechnischen Daten entwickelt, und A. um Bodenprofile relevanter Parameter an Lokationen ohne direkte Baugrundaufschlüsse zu erzeugen (synthetische CPT). Der Bedarf an innovativen Lösungen im Bereich der Baugrundmodellierung besteht, wie letzte Ausschreibungen von Behörden wie RVO (= Rijksdienst voor Ondernemend Nederland) & d. BSH zeigen. Statistische Analysen sind gefordert, um eine reguläre Nutzung synthetischer Baugrundprofile durch Einsatz zertifizierten Analysewerkzeugs zu ermöglichen. IWES & GuD stellen sich der Herausforderung, anknüpfend an existierende geostatistische Methoden, ein probabilistisches Baugrundmodell zu entwickeln. Dadurch wird eine Quantifizierung aller mit der Beschreibung des Baugrundes assoziieren Unsicherheiten (z.B. Heterogenität des Baugrundes, Messunsicherheiten usw.) erreicht, so dass im Ergebnis an jedem Modellpunkt bemessungsrelevanten Baugrundparameter 'mit Sicherheiten behaftet' abgeleitet werden können. Dazu sind sämtliche input-Größen in das Modell mit Streuungen zu integrieren. Das umfasst geophysikalische & geotechnische Mess- & Versuchsergebnisse sowie Modellunsicherheiten in interpolierten Bereichen. Eine umfassende statistische Analyse aller seismischen & geotechnische Informationen soll es ermöglichen, laterale Änderungen der relevanten geotechnischen Parameter zu quantifizieren. Geplant ist ein dreijähriges Forschungsprojekt durch Fraunhofer IWES & GuD Geotechnik und Dynamik Consult GmbH, mit begleitender Industrie-Arbeitskreis (EnBW, G-tec S.A., Ocean Floor Geophysics, Niedersachsenwasser, BSH und BAW)

1 2 3 4 5 … 43 44 45