Dear Colleagues
A query about old AEM systems showed up on the grav/mag server. I sent him a Lundberg marketing booklet which is pretty good (published in 1959). Maybe others have something they could contribute? Re From: [email protected] <[email protected]> On Behalf Of Nicholas Gant Sent: Wednesday, July 17, 2019 11:37 AM To: [email protected] Subject: [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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