Helicopter-borne Electromagnetics (HEM) German North Sea coast - Models

This dataset has been compiled within the BGR project "D-AERO-Auswertung" based on several survey area located along the German North Sea coast. The BGR helicopter (Sikorsky S-76B) is used for airborne geophysical surveying of the Earth’s subsurface. The standard equipment comprises the methods electromagnetics, magnetics and radiometrics. The active multi-frequency, helicopter-borne electromagnetic (HEM) system, which consists of circular (diameter about 0.5 m) transmitter and receiver coils (horizontal separation about 8 m) operating at five and since 2007 at six system frequencies, is housed by a flying tube (bird) about 40 m beneath the helicopter. The HEM system used before 2002 consisted of rectangular coils (horizontal separation slightly less than 7 m) and five system frequencies (0.4 - 190 kHz). The ratio of received and transmitted signal yields to the electrical conductivity down to 50/150 m depth in case of conductive/resistive subsurface. Horizontal resistivity (= inverse of conductivity) sections are derived at several depths from multi-layer inversion results (1D resistivity-depth models).

Citation proposal
(2017) . Helicopter-borne Electromagnetics (HEM) German North Sea coast - Models. https://gdk.gdi-de.org/geonetwork/srv/api/records/05bc31d9-0ac4-4bd2-9fab-7b5c878aece4

INSPIRE
SDS

INSPIRE

Identification

File identifier: 05bc31d9-0ac4-4bd2-9fab-7b5c878aece4 XML

Hierarchy level: Dataset

Online resource

Resource identifier

code: 99fc9d7b-1842-4cf9-8790-e26c167a9fff

code: http://doi.org/10.25928/bgr2017heminv_22v5-bg06

Metadata language: German

Spatial representation type: Grid

Encoding

Format: georef. TIFF

Version: n/a

Projection

Classification of data and services

Topic category

Geoscientific information

Classification of data and services

Coupled resource

Classification of data and services

Coupled resource

Keywords

GEMET - INSPIRE themes, version 1.0 ( Theme )

Geologie
Geology

GEMET - Concepts, version 2.4 ( Theme )

Geophysik

Other keywords

Keywords ( Theme )

Aerogeophysik
Hubschrauber-Elektromagnetik
elektrische Leitfähigkeit
spezifischer Widerstand
Halbraumwiderstand
Schwerpunktstiefe
airborne geophysics
helicopter-borne electromagnetics
electrical conductivity
resistivity
apparent resistivity
centroid depth

Keywords ( Place )

Niedersachsen
Schleswig-Holstein
Hansestadt Hamburg

Geographic coverage

Temporal reference

Temporal extent

Date ( Publication ): 2017-02-23

Quality and validity

Lineage: Zusammenstellung im Rahmen des BGR-Projektes "D-AERO-Auswertung": Messgebiete: 081_Cuxhaven (2000), 087_Bremerhaven (2001), 109_Hadelner Marsch (2004), 111_Ellerbeker Rinne (2005/2006), 128_Langeoog (2008/2009), 129_Esens (2008/2009), 130_Borkum (2008), 132_Glückstadt (2008/2009), 138_Nordenham (2009/2010), 133_Jever (2014), 139_Varel (2014)

Conformity

Explanation: siehe dazu die angegebene Durchführungsbestimmung

Restrictions on access and use

Access constraints: Allgemeine Geschäftsbedingungen, siehe https://www.bgr.bund.de/AGB - General terms and conditions, see https://www.bgr.bund.de/AGB_en. Die bereitgestellten Informationen sind bei Weiterverwendung wie folgt zu zitieren: Datenquelle: NordseekuesteHEM, (c) BGR, Hannover, 2017, doi:10.25928/bgr2017heminv_22v5-bg06