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Unmanned airborne vehicle (UAV): Flight testing and evaluation of two-channel E-field very low frequency (VLF) instrument

Description: Using VLF frequencies, transmitted by the Navy`s network, for airborne remote sensing of the earth`s electrical, magnetic characteristics was first considered by the United States Geological Survey (USGS) around the mid 1970s. The first VLF system was designed and developed by the USGS for installation and operation on a single engine, fixed wing aircraft used by the Branch of Geophysics for geophysical surveying. The system consisted of five channels. Two E-field channels with sensors consisti… more
Date: December 1, 1998
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Magnetic Fields of AM Band Radio Broadcast Signals at the Richmond Field Station

Description: Non-invasive sensing of the shallow subsurface is necessary for detection and delineation of buried hazardous wastes, monitoring of the condition of clay containment caps, and a variety of other purposes. Electromagnetic methods have proven to be effective in environmental site characterization where there is a need for increased resolution in subsurface characterization. Two considerations strongly suggest the use of frequencies between 100 kHz and 100 MHz for such applications: 1) the inducti… more
Date: December 1, 1998
Creator: Becker, Alex & Frangos, William
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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