In radar-related subjects and in JTIDS, a data mile is a unit of distance equal to 6000 feet (1.8288 kilometre), or 0.987 nautical miles. An international mile is exactly 0.88 of a data mile. This long range radar antenna, known as ALTAIR, is used to detect and track space objects in conjunction with ABM testing at the Ronald Reagan Test Site on the Kwajalein atoll[1]. Radar is a system that uses radio waves to detect, determine the distance of, and map, objects such... The Joint Tactical Information Distribution System (JTIDS) is an L-band TDMA network radio system used by the United States armed forces and their allies to support data communications needs, principally in the air and missile defense community. ... This article is about a foot as a unit of length. ... A kilometre (American spelling: kilometer), symbol: km is a unit of length in the metric system equal to 1000 metres (from the Greek words χίλια (khilia) = thousand and μέτρο (metro) = count/measure). ... A nautical mile is a unit of length. ... A mile is any of several units of distance, or, in physics terminology, of length. ...