| 1. determining latitude and longitude |
| 2. constellation of satellites |
| 3. US system of GPS and Russian system of GLONASS |
| 4. navigation |
A) 1, 3 and 4
B) 1 and 4
C) 2 and 3
D) All of these
Correct Answer: A
Solution :
The Global Positioning System (GPS) is a space-based radio navigation system owned by the United States government and operated by the United States Air Force. It is a global navigation satellite system that provides geo location and time information to a GPS receiver anywhere on or near the Earth where there is an unobstructed line of light to four or more GPS satellites. The GPS system operates independently of any telephonic or internet reception, though these technologies can enhance the usefulness of the GPS positioning information. The GPS system provides critical positioning capabilities to military, civil, and commercial users around the world. The United States government created the system, maintains it, and makes it freely accessible to anyone with a GPS receiver However, the US government can selectively deny access to the system, as li appended to the Indian military in 1999 during the Kargil War.
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