Abstract
IN a paper to be published shortly1, I have discussed the problem of ground-wave transmission across a land/sea boundary, and have predicted that under some conditions there should be a marked recovery in field-strength. On medium wave-lengths this recovery should extend to a considerable distance over sea, though, so far as I am aware, no conclusive evidence of this phenomenon has yet been published. The theory shows that the effect should not be confined to the diffraction region ; but that on sufficiently short wave-lengths it should occur at distances where the Sommerfeld flat-earth analysis is valid.
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