Satellite Based Augmentation System - GS questions based on daily current affairs

1)   Which of the following pair/s of satellite-based augmentation system is/are wrongly matched? satellite-based augmentation system

1. WAAS -US
2. SDCM - Russia
3. MSAS- Japan
4. SNAS – China


a. 1,2,4
b. Only 3
c. 2,3
d. None
Answer  Explanation 

ANSWER: None

Explanation:
- The People's Republic of China is developing its own SBAS, called Satellite Navigation Augmentation System (SNAS).
- The MTSAT Satellite Augmentation System (MSAS) is the Japanese Satellite Based Augmentation System (SBAS) System
- The System for Differential Corrections and Monitoring (SDCM) is the SBAS currently being developed in the Russian Federation as a component of GLONASS.
- The Wide Area Augmentation System (WAAS) is the United States Satellite Based Augmentation System.