Abstract
An experiment is described in which very low frequency signals transmitted on 18 kc by NSS are detected after traveling once around the world. A diurnal field-intensity variation was observed with the maximum intensity appearing at sunset at the sending and receiving locations. The signal delay times were measured with 0.1373±.0005 sec delay under normal ionospheric conditions and 0.1365±.0005 sec delay on a disturbed day.
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