SOLAR SYSTEM

Detailed explanation-1: -The tracking subsystem that is present in an earth station keeps tracking of satellite, when it is released from last stage of Launch vehicle. It performs the functions like, locating of satellite in initial orbit and transfer orbit.

Detailed explanation-2: -Satellite Communications Question 8 Detailed Solution The correct answer is Global Positioning System. GPS, or the Global Positioning System, is a global navigation satellite system that provides location, velocity, and time synchronization.

Detailed explanation-3: -Choice of the systems The three tracking systems–interferometry, tone-ranging and Doppler tracking, the last being a supplement to the first two–were decided upon to meet the following requirements of accuracy: direction cosine angle : 4-6’ of an are; range : 4-I km; range rate : 4-6-6 m/s.

Detailed explanation-4: -To accomplish this, each of the 31 satellites emits signals that enable receivers through a combination of signals from at least four satellites, to determine their location and time. GPS satellites carry atomic clocks that provide extremely accurate time.

Detailed explanation-5: -The position can be determined by measuring the distance from the satellite.

Detailed explanation-6: -Cosmos is an example of weather satellite. It is a type of satellite that is primarily used to monitor the weather and climate of the Earth.