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Countries with satellite navigation systems — UPSC Prelims PYQ 2023

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Australia
Canada
Israel
Japan

Explanation

Option (d) is correct

Navigation Systems of the World: There are 4 Global Navigation Systems. They are:
1. Global Positioning System (GPS) from the U.S.
2. Global Navigation Satellite System (GLONASS) from Russia
3. Galileo from the European Union
4. BeiDou from China
There are 2 Regional Navigation Systems. They are:
1. NavIC from India
2. Quasi-Zenith Satellite System (QZSS) from Japan

Satellite Navigation is based on a global network of satellites that transmit radio signals.
The working of the navigation system is based on the trilateration & triangulation principle.
- Triangulation and Trilateration work with line-of-sight
- Triangulation measures precise angles (not distance)
- Trilateration measures precise time data to pinpoint a location

Answer: (d) Japan; Difficulty Level: Easy

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