Which system uses satellites to determine location coordinates?

The Global Positioning System (GPS) is the correct answer because it specifically utilizes a network of satellites that transmit signals to determine precise location coordinates on Earth. GPS works by triangulating signals from multiple satellites to accurately calculate the user's latitude, longitude, and elevation. This system is widely used for navigation, mapping, and various applications in both civilian and military contexts.

In contrast, while a Geographical Information System (GIS) may utilize GPS data, it primarily focuses on capturing, storing, analyzing, and managing spatial and geographic information rather than determining location coordinates directly. Remote sensing systems involve gathering data from satellites or aircraft focused on Earth observation, but they don't directly provide location coordinates like GPS does. Similarly, satellite imagery systems refer to the collection of images from satellites, which, while they can depict locations, do not independently determine coordinates in the manner that GPS does.