Nick:You're more likely to find someone with knowledge and experience with an AEM system on the SEGMIN (SEG Mining) e-mail list. (I know of it, but not much detail.) I've included that list here. Greg Hodges
----- Forwarded Message ----- From: Nicholas Gant <[email protected]>To: [email protected] <[email protected]>Sent: Wednesday, July 17, 2019, 01:46:49 p.m. EDTSubject: [GRVMAG] Re: 1960s ABEM airborne em system Hello all, this may not be the right forum to raise this query, but have any of you really old folks recall, have knowledge about or had first or second hand experience of the ABEM airborne em system of the early 1960s ? It was soon replaced by the Barringer Input system. The method used two fixed wing aircraft, one having a rectangular vertical antenna/coil (say 4' x 6') mounted on top of the fuselage (the transmitting coil ?), the other aircraft probably towing a multi coil sensor in a bird. Photos I have show no wing-tip/tail/wing-tip/nose loop, so I assume the the receiver antenna may be bird-mounted. Again, I assume one aircraft followed the other, horizontal separation about 100 m. It was not a successful system due to operating expense if nothing else, one interpreter called it "stupid"..... Has anyone any knowledge of this obsolete method, or have references to it ? Best wishes, Nick,Danville, CA.
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