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
 

Simple

Alternate title
HEM-RD (Serie)
Date ( Publication )
2019-10-23
Identifier
58a1307d-d6b8-8da0-c117-bcfc992f805b
Status
onGoing On going

  Point of contact

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 )
  • Deutschland
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Other restrictions
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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
Spatial representation type
Text, table
Metadata language
German
Character set
UTF8
Topic category
  • Geoscientific information
N
S
E
W


Distribution format
  • ASCII (n/a )

OnLine resource
BGR-Website: Aeroelektromagnetik  

BGR-Website: Aeroelektromagnetik

Hierarchy level
Series
Statement
Erarbeitung im Rahmen diverser Projekte, in denen das aerogeophysikalische Messsystem der BGR in Deutschland eingesetzt wurde.

gmd:MD_Metadata

File identifier
c8f04aa5-b5e2-4112-8554-9652fee655bc   XML
Metadata language
German
Character set
UTF8
Hierarchy level
Series
Hierarchy level name
Geophysik
Date stamp
2025-04-07
Metadata standard name
INSPIRE Metadata Implementing Rules: Technical Guidelines based on EN ISO 19115 and EN ISO 19119
Metadata standard version
n/a

  Point of contact

Website
https://www.bgr.bund.de  
 
 

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