Special Features:

Designed for interfacing with thegps space vehicles and master control station; is unmanned; it receives commands and returns data via an encrypted telecommunications link

Properties:

A fixed number of components and/or items, not all having the same basic name, of a ground or airborne navigation set that acquires and tracks signals from a constellation of orbital satellites to obtain time and three-dimensional position and velocity directly or in conjunction with sub systems of the host vehicle. Excludes stand alone navigation systems, such as inertial navigation set.