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Fundamental study on airborne electromagnetic survey using grounded source; Chihyo source gata kuchu denji tansa no kisoteki kenkyu. 2

Abstract

With an objective to develop an airborne electromagnetic survey method for greater depths achievable of exploration, a discussion was given on an exploration method of a type in which a transmitting device is placed on the ground to receive signals in an atmosphere. A prototype exploration apparatus is mounted with a fluxgate magnetometer, an attitude meter, a GPS, and a battery. This exploration apparatus is suspended on a 30 meter long rope from a helicopter to perform the exploration. Two flight tests on this apparatus were carried out in the Unzen area, Nagasaki Prefecture and the Motomiya area, Wakayama Prefecture. The ground source was extended to a distance of 1.5 km, and a current of about 20 A was flown with a quiescent wave having four-second cycles. The helicopter flew nearly horizontally at a ground speed of about 50 km, a flight altitude of 450 m above sea level, and a terrain clearances of 100 to 400 m. The obtained data had variations in correspondence with changes in roll and pitch angles, whereas the variation of about 5000 nT was reduced to about 1000 nT as a result of correction. It was not possible, however, to correct completely the variation  More>>
Authors:
Mogi, T; Fujimitsu, Y; [1]  Tanaka, Y; [2]  Jomori, N; [3]  Morikawa, T; [4]  Kusunoki, K [5] 
  1. Kyushu University, Fukuoka (Japan). Faculty of Engineering
  2. Kyoto University, Kyoto (Japan). Faculty of Science
  3. Chiba Electronics Research Institute, Chiba (Japan)
  4. Dowa Engineering Co. Ltd., Okayama (Japan)
  5. Central Research Institute of Electric Power Industry, Tokyo (Japan)
Publication Date:
May 27, 1997
Product Type:
Conference
Report Number:
CONF-9705167-
Reference Number:
SCA: 440700; 580000; PA: NEDO-97:912251; EDB-97:120327; SN: 97001846543
Resource Relation:
Conference: 96. SEGJ conference, Butsuri tansa gakkai dai 96 kai (1997 nendo shunki) gakujutsu koenkai, Tokyo (Japan), 27-29 May 1997; Other Information: PBD: 27 May 1997; Related Information: Is Part Of Proceeding of the 96th (spring, fiscal 1997) SEGJ Conference; PB: 502 p.; Butsuri tansa gakkai dai 96 kai (1997 nendo shunki) gakujutsu koenkai koen ronbunshu
Subject:
44 INSTRUMENTATION, INCLUDING NUCLEAR AND PARTICLE DETECTORS; 58 GEOSCIENCES; ELECTROMAGNETIC SURVEYS; AIRCRAFT; HELICOPTERS; FLUXGATE MAGNETOMETERS; VELOCITY; ALTITUDE; MAGNETIC PROPERTIES; CONTROL; ORIENTATION; POSITION SENSITIVE DETECTORS; FLIGHT TESTING
OSTI ID:
522652
Research Organizations:
Society of Exploration Geophysicists of Japan, Tokyo (Japan)
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Other: ON: DE97770262; TRN: 97:912251
Availability:
Available from The Society of Exploration Geophysicists of Japan, 2-18, Nakamagome 2-chome, Ota-ku, Tokyo, Japan; OSTI as DE97770262
Submitting Site:
NEDO
Size:
pp. 229-231
Announcement Date:

Citation Formats

Mogi, T, Fujimitsu, Y, Tanaka, Y, Jomori, N, Morikawa, T, and Kusunoki, K. Fundamental study on airborne electromagnetic survey using grounded source; Chihyo source gata kuchu denji tansa no kisoteki kenkyu. 2. Japan: N. p., 1997. Web.
Mogi, T, Fujimitsu, Y, Tanaka, Y, Jomori, N, Morikawa, T, & Kusunoki, K. Fundamental study on airborne electromagnetic survey using grounded source; Chihyo source gata kuchu denji tansa no kisoteki kenkyu. 2. Japan.
Mogi, T, Fujimitsu, Y, Tanaka, Y, Jomori, N, Morikawa, T, and Kusunoki, K. 1997. "Fundamental study on airborne electromagnetic survey using grounded source; Chihyo source gata kuchu denji tansa no kisoteki kenkyu. 2." Japan.
@misc{etde_522652,
title = {Fundamental study on airborne electromagnetic survey using grounded source; Chihyo source gata kuchu denji tansa no kisoteki kenkyu. 2}
author = {Mogi, T, Fujimitsu, Y, Tanaka, Y, Jomori, N, Morikawa, T, and Kusunoki, K}
abstractNote = {With an objective to develop an airborne electromagnetic survey method for greater depths achievable of exploration, a discussion was given on an exploration method of a type in which a transmitting device is placed on the ground to receive signals in an atmosphere. A prototype exploration apparatus is mounted with a fluxgate magnetometer, an attitude meter, a GPS, and a battery. This exploration apparatus is suspended on a 30 meter long rope from a helicopter to perform the exploration. Two flight tests on this apparatus were carried out in the Unzen area, Nagasaki Prefecture and the Motomiya area, Wakayama Prefecture. The ground source was extended to a distance of 1.5 km, and a current of about 20 A was flown with a quiescent wave having four-second cycles. The helicopter flew nearly horizontally at a ground speed of about 50 km, a flight altitude of 450 m above sea level, and a terrain clearances of 100 to 400 m. The obtained data had variations in correspondence with changes in roll and pitch angles, whereas the variation of about 5000 nT was reduced to about 1000 nT as a result of correction. It was not possible, however, to correct completely the variation with short cycles, requiring further discussions on frequency characteristics of the magnetometer. 6 figs., 1 tab.}
place = {Japan}
year = {1997}
month = {May}
}