noun
: a shifting of the apparent direction of arrival of radio waves received with a direction finder that is sometimes accompanied by other irregularities of wave behavior and is most commonly observed at night
noun
: a shifting of the apparent direction of arrival of radio waves received with a direction finder that is sometimes accompanied by other irregularities of wave behavior and is most commonly observed at night
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012