Definition
The space element is the constellation of GPS satellites orbiting the Earth that continuously broadcast precisely timed signals containing their position and clock data. These signals are received by GPS units on aircraft and on the ground to calculate position, altitude, and time. The space element is one of three parts of the GPS system, along with the control element (ground stations that monitor and manage the satellites) and the user element (the GPS receivers themselves).
Plain English
It's the group of GPS satellites in orbit that send the signals your GPS receiver uses to figure out where you are.
Context Anchor
Seen in GPS system descriptions, where GPS is divided into the space element, control element, and user element.
Derivation
Element' here means 'one component of a larger system.' The 'space element' is simply the part of the GPS system that lives in space, as opposed to the parts on the ground (control) or in the cockpit (user).
Why Pilots Care
Knowing how the space element works helps pilots understand GPS availability, accuracy, and the effect of satellite geometry on navigation performance.
Intuition Check
Do not read space element as the empty space around the airplane. Here it means the satellite part of the GPS system.
Example Sentence 1
The instructor explained that the space element consists of the GPS satellite constellation broadcasting signals to receivers worldwide.
Example Sentence 2
Loss of signals from several satellites in the space element can degrade GPS accuracy during an IFR flight.