Q.82 Which of the following options represents the satellite-based positioning systems run by Russia?
- ATSIKADA and GLONASSCorrect
- BTRANSIT and GLONASS
- CTSIKADA and GPS
- DGPS and GLONASS
Solution
Concept
GLONASS and TSIKADA are satellite positioning/navigation systems of Russia (former USSR). GPS and TRANSIT belong to the USA.
Step-by-step solution
1. GPS (NAVSTAR) is run by the USA. 2. TRANSIT (NNSS) is an old Doppler satellite system of the US Navy. 3. GLONASS is the global navigation satellite system of Russia. 4. TSIKADA (Tsikada) is an old Soviet/Russian Doppler satellite navigation system. 5. So both Russian systems are TSIKADA and GLONASS. Answer is (A).
Explanation
Russia (earlier USSR) developed TSIKADA, a Doppler-based satellite navigation system, and later GLONASS, a global system. GPS and TRANSIT are American systems. So option (A) has both Russian systems.
Why the other options are wrong
(B) TRANSIT is a US Navy system. (C) GPS is a US system. (D) GPS is a US system.
Shortcut
Any option with GPS or TRANSIT is out, because both are American.
Common mistake
Thinking TRANSIT is Russian. TRANSIT is the US counterpart of TSIKADA.
Correct answer: A) TSIKADA and GLONASS