We have gps with 489 questions.
Excerpt: "GPS is a space-based satellite navigation system that provides location and time information."
Wiki: "The Global Positioning System (GPS) is a space-based satellite 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 provides critical capabilities to military, civil and commercial users around the world. It is maintained by the United States government and is freely accessible to anyone with a GPS receiver.http://en.wikipedia.org/wiki/Gps"
We also have gnss with 14 questions.
Excerpt: "GNSS (Global Navigation Satellite System) is a satellite system that is used to pinpoint the geographic location of a user's receiver anywhere in the world."