Which of the following depends a great deal on satellites? A. GPS B. elevation O C. equator O D. compass roses​

A. GPS

GPS stands for Global Positioning System, which is a space-based navigation system that provides location and time information in all weather conditions, anywhere on or near the Earth where there is an unobstructed line of sight to four or more GPS satellites. The system relies heavily on satellites because it uses a constellation of at least 24 satellites orbiting the Earth to provide the necessary signals.

Extra: GPS satellites broadcast signals from space that GPS receivers use to provide three-dimensional location (latitude, longitude, and altitude) plus the time. Individuals with a GPS device can use this information for a variety of applications, including navigation, mapping, timing, and more.

The concepts of elevation (B), equator (C), and compass roses (D) do not inherently depend on satellites:

B. Elevation is a measurement of how high something is above a reference point, typically sea level. It can be measured using traditional surveying techniques, GPS, or other modern technologies, but elevation existed as a concept and was measured long before the advent of satellites.

C. The equator is an imaginary line around the middle of the Earth, an equal distance from the North Pole and the South Pole. It is the 0° line of latitude. This concept is determined by the geometry of the Earth and is not dependent on satellites.

D. Compass roses are figures on maps and nautical charts to display the orientation of the cardinal directions—North, East, South, and West. They have been used since before the age of satellites to assist with direction finding, typically using a magnetic compass.