What is a GPS satellite constellation?

A GPS satellite constellation refers to a specific group of satellites operating in a synchronized manner to provide comprehensive positioning services globally. These satellites are strategically placed in medium Earth orbit, allowing them to continuously transmit signals that can be picked up by GPS receivers on the ground. The design of the constellation is such that at least four satellites are visible from any point on Earth at any time, ensuring accurate triangulation and positioning.

The significance of option A lies in its emphasis on constant and worldwide coverage, which is fundamental for the effectiveness of GPS technology. This arrangement allows users to determine their locations anywhere on the globe, enabling a wide range of applications—from navigation in vehicles to precise surveying and mapping tasks.

The other choices revolve around different functionalities and purposes of satellite technology but do not pertain to the GPS system specifically. For instance, data storage satellites serve entirely different functions than positioning satellites, weather satellites focus on atmospheric observation, and satellite networks for internet provide communication services rather than geographical positioning. Thus, the description of a GPS satellite constellation is uniquely aligned with the capability to support global positioning systems.