About: Raw Data on Helicopter-borne Electromagnetics (HEM)     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : dcat:Dataset, within Data Space : resource.bgr.de associated with source document(s)

AttributesValues
type
dcat:contactPoint
dcat:keyword
  • Geologie
  • Geophysik
  • Deutschland
  • Geology
  • Aerogeophysik
  • Halbraumwiderstand
  • Hubschrauber-Elektromagnetik
  • apparent resistivity
  • centroid depth
  • electrical conductivity
  • elektrische Leitfähigkeit
  • helicopter-borne electromagnetics
  • resistivity
  • spezifischer Widerstand
  • Schwerpunktstiefe
  • airborne geophysics
dcat:landingPage
dcat:theme
Title
  • Rohdaten der Hubschrauber-Elektromagnetik (HEM)
  • Raw Data on Helicopter-borne Electromagnetics (HEM)
Description
  • 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.
  • Der BGR-Messhubschrauber (Sikorsky S-76B) wird zur aerogeophysikalischen Erkundung des Erduntergrundes eingesetzt. Das Standardmesssystem umfasst die Methoden Elektromagnetik, Magnetik und Radiometrie. Das aktive Mehrfrequenzmesssystem der Hubschrauber-Elektromagnetik (HEM) besteht aus runden (Durchmesser etwa 0,5 m) Sende- und Empfangsspulen (horizontaler Abstand etwa 8 m), die sich in einer Flugsonde etwa 40 m unterhalb des Hubschraubers befinden. Bis 2002 wurde ein HEM-System mit Rechteckspulen (horizontaler Abstand knapp 7 m) und fünf Messfrequenzen (0,4 - 190 kHz). Das Verhältnis aus Empfangs- zu Sendefeld liefert die elektrische Leitfähigkeit bis etwa 50/150 m Tiefe bei gut/schlecht leitendem Erduntergrund.
Identifier
  • 58a1307d-d6b8-8da0-c117-bcfc992f805b
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