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

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
Coupled resource
 
 

Classification of data and services

Coupled resource
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

N
S
E
W


 

Temporal reference

Temporal extent
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

Conformity
Conformity
 

Conformity

Conformity
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
 

Restrictions on access and use

 

Responsible organization (s)

Contact for the resource
Organisation name
Bundesanstalt für Geowissenschaften und Rohstoffe (BGR)
Email
heli@bgr.de
 

Responsible organization (s)

Contact for the resource
Organisation name
Bundesanstalt für Geowissenschaften und Rohstoffe (BGR)
Email
heli@bgr.de
 

Metadata information

Contact for the metadata
Organisation name
Bundesanstalt für Geowissenschaften und Rohstoffe (BGR)
Email
geodatenmanagement@bgr.de
Date stamp
2025-04-07
Metadata language
German
Character set
UTF8
 
 

SDS

Conformance class 1: invocable

Access Point URL
Endpoint URL
Technical specification
 

Conformance class 2: interoperable

Coordinate reference system
 
Quality of Service
 
Access constraints
Limitation
 
Use constraints
Limitation
 
Responsible custodian
Contact for the resource
 
 

Conformance class 3: harmonized

 
 

  Overviews

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  Associated resources

Not available