What is Gramsat in satellite communication?

GRAMSAT Scheme. Under “Gramsat Scheme’, ISRO’s contribution is to provide the necessary satellite bandwidth to respective State Governments. The expenditure for providing satellite bandwidth for the last 3 years amounts to approximately Rs 9.00 crore (at a rate of Rs 3.00 Crore per year).

What is meant by payload in satellite communication Mcq?

(a) The payload refers to the equipment used to provide the service for which the satellite has been launched. (b) The payload refers to the equipment used to provide the service for which the satellite has been stabilize in orbit. (c) a & b. (d) None of above. 38.

Why are transponders placed in satellites?

The subsystem, which provides the connecting link between transmitting and receiving antennas of a satellite is known as Transponder. It is one of the most important subsystem of space segment subsystems. Transponder performs the functions of both transmitter and receiver (Responder) in a satellite.

What is the full form of GSAT 15?

GSAT-15 is an Indian communication satellite similar to GSAT-10 to augment the capacity of transponders to provide more bandwidth for Direct-to-Home television and VSAT services. It was successfully launched on 10 November 2015 at 21:34:07 UTC aboard an Ariane 5 rocket, along with the ArabSat 6B satellite. GSAT-15.

What do you mean by payload?

Definition of payload 1 : the load carried by a vehicle exclusive of what is necessary for its operation especially : the load carried by an aircraft or spacecraft consisting of things (such as passengers or instruments) necessary to the purpose of the flight. 2 : the weight of a payload.

What is payload satellite communication?

A hosted payload is a module attached to a commercial satellite with communications circuitry that operates independently of the main spacecraft but which shares the satellite’s power supply and transponders. The concept has been also been referred to as “piggybacking” or “hitchhiking.”

Which modulation is used in satellite communication?

The constant envelope modulation schemes such as FSK and PSK are the most suitable for satellite communications because they minimize the effect of nonlinear amplification in the high-power amplifier.

Which frequency is used in satellite communication?

Ku-band (12–18 GHz) Used for satellite communications. In Europe, Ku-band downlink is used from 10.7 GHz to 12.75 GHz for direct broadcast satellite services, such as Astra.

What is the main function of transponder?

A transponder is a wireless communications, monitoring, or control device that picks up and automatically responds to an incoming signal. The term is a contraction of the words transmitter and responder. Transponders can be either passive or active.

How many transponders are in a satellite?

The Boeing 702 series of satellites, in contrast, can have more than 100 transponders, and with the use of digital compression technology each transponder can have up to 16 channels, providing more than 1,600 TV channels through one satellite.