Hi All
A demonstration that ground battery is implied in lrl detection it's that a square copper slab of about 10 cm and an aluminum rod (from a tv antenna) they are detected by my lrl at about 2 m. The copper is partially buried at about a distance of 50 cm from the aluminum rod and the earth must be humid. I ask to Morgan and Geo to test this target with their lrls. I think that this is an easy way in order to make experiments. The static E field of the atmosphere is modified by a ground battery also for 10 m or more, but if we measure only the DC voltage in a determined point we cannot distinguish from a near point, because the change is perhaps greater then ground battery voltage and this is the cause of "wall and tree" detection by the instruments based only on High impedance DC measurements. We have need of other data and it can be obtained from a variable B field. We know that a variable B field generates a variable E field at the same frequency and this E field it induces a current in every conductor, that is the TR and the RX coils, but this E field is added also to the static E field of the atmosphere and this is a vectorial sum and it depends from various angles of the vectors. I'm not an engineer neither a scientist and so I can do only a qualitative reasoning but my conclusion is that for the lrl detection it's necessary 2 mixed signal, one for the RX coil, where is the induced E field ( variable E field + DC E field ) and one from a ferrite coil, not in the same position of RX coil, where is another signal with a different phase: The purpose is to maximise the target signal and to reduce others signals, "compass, sky, walls and trees.
Best Regards
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