GNSS stands for Global Navigation Satellite Systems. As of today, which of the following is the complete set of GNSS constellations that cover the entire globe?
Show Hint
- GPS, GLONASS, Galileo, BeiDou, IRNSS, QZSS
- GPS, GLONASS, Galileo, BeiDou, IRNSS, QZSS, GAGAN, WAAS, EGNOS
- GPS, GLONASS, Galileo
- GPS, GLONASS, Galileo, BeiDou
The Correct Option is D
Solution and Explanation
IRNSS/NavIC (India) and QZSS (Japan) are regional systems (coverage over specific regions, not global). GAGAN, WAAS, and EGNOS are SBAS augmentations, not core constellations. Hence only option (D) lists the complete set of globally covering constellations.
\[ \boxed{\text{(D)}} \]
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