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

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. The results are displayed as apparent resistivity (= half-space resistivity) and centroid depth maps at each of the six system frequencies ranging from 0.4 to 130 kHz.

Citation proposal
(2017) . Helicopter-borne Electromagnetics (HEM) German North Sea coast - Data. https://gdk.gdi-de.org/geonetwork/srv/api/records/95bf161d-16b1-4793-a72a-f4006792564e

Identification

Data identification

Citation

Alternate title: NordseekuesteHEM_Daten

Date ( Publication ): 2017-02-23

Identifier: 7de56533-84e7-42b2-883b-a3045c880091

Identifier: http://doi.org/10.25928/bgr2017hem_sfpb-1064

Status: onGoing On going

Point of contact

Bundesanstalt für Geowissenschaften und Rohstoffe (BGR) - Siemon, Bernhard, Dr.

Stilleweg 2 Hannover 30655 Deutschland

GEMET - INSPIRE themes, version 1.0 ( Theme )

Geologie
Geology

GEMET - Concepts, version 2.4 ( Theme )

Geophysik

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

Legal constraints

Access constraints: Other restrictions

Legal constraints

Use constraints: Other restrictions

Other 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/bgr2017hem_sfpb-1064

Spatial representation type: Grid

Metadata language: German

Character set: UTF8

Topic category

Geoscientific information

Distribution

Distribution format

georef. TIFF (n/a )

Digital transfer options

Transfer size: 10

OnLine resource: NordseekuesteHEM_Daten (georef. TIFF)
NordseekuesteHEM_Daten im Format georef. TIFF

OnLine resource: BGR-Website: Aeroelektromagnetik
BGR-Website: Aeroelektromagnetik

OnLine resource: BGR-Website: Projekt D-AERO
BGR-Website: Projekt D-AERO

OnLine resource: Karte im BGR-Geoviewer
Karte im BGR-Geoviewer

Quality

Data quality

Scope

Hierarchy level: Dataset

Conformance result

Citation

Date ( Publication ): 2010-12-08

Explanation: siehe dazu die angegebene Durchführungsbestimmung

Statement: 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)