Match the description with the correct term. Options are: User Segment, Control Segment, Space Segment and Satellite Surveying a. Consists of two categories of receivers that are classified by their access to two services that the system provides. b. Consists of monitoring stations, which monitor the signals and track the positions of satellites over time. c. Consists nominally of 24 satellites operating in 6 orbital planes spaced at 60-degree intervals around the equator. d. The satellites become the reference or control stations and the ranges to these satellites are used to compute positions of the receiver