Raw Data on Helicopter-borne Electromagnetics (HEM)

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 consists of circular (diameter about 0.5 m) transmitter and receiver coils (horizontal separation about 8 m) 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.

Citation proposal
(2019) . Raw Data on Helicopter-borne Electromagnetics (HEM). https://gdk.gdi-de.org/geonetwork/srv/api/records/c8f04aa5-b5e2-4112-8554-9652fee655bc

INSPIRE
SDS

INSPIRE

Identification

File identifier: c8f04aa5-b5e2-4112-8554-9652fee655bc XML

Hierarchy level: Series

Online resource

Resource identifier

code: 58a1307d-d6b8-8da0-c117-bcfc992f805b

Metadata language: German

Spatial representation type: Text, table

Encoding

Format: ASCII

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 )

Deutschland

Geographic coverage

Temporal reference

Temporal extent

Date ( Publication ): 2019-10-23

Quality and validity

Lineage: Erarbeitung im Rahmen diverser Projekte, in denen das aerogeophysikalische Messsystem der BGR in Deutschland eingesetzt wurde.

Conformity

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: HEM-RD, (c) BGR, Hannover, 2019