What is another word for skip distance?
Pronunciation: [skˈɪp dˈɪstəns] (IPA) 
Skip distance refers to the distance between a transmitting antenna and the closest point on the ground where the signal can be reflected back to the antenna. There are several synonyms for this term that can be used interchangeably in different contexts. One of the most common terms is "ground reflection distance," which refers to the distance between the antenna and the point where the reflected signal hits the ground. Another term is "radio horizon," which refers to the maximum distance that a radio wave can travel without obstruction. "Bounce length" is another synonym that refers to the distance between the antenna and the point where the signal is reflected off the ionosphere or upper atmosphere.
