Table of Contents
What is payload and transponder?
Payload is the equipment used to provide the service for which the satellite has been launched. Transponder is the equipment which provides the connecting link between the transmitting antennas and receiving antennas of a satellite for communication.
What is the use of transponder in satellite?
In a communications satellite, a transponder gathers signals over a range of uplink frequencies and re-transmits them on a different set of downlink frequencies to receivers on Earth, often without changing the content of the received signal or signals.
What are the roles of transponder how many transponders are used in a satellite system?
Transponder performs mainly two functions. Those are amplifying the received input signal and translates the frequency of it. It receives uplink signal from the satellite antenna and transmits downlink signal to the satellite antenna. Low Noise Amplifier (LNA) amplifies the weak received signal.
What is meant by payload in satellite communication?
In a nutshell, the payload is the communications antennas, receivers, and transmitters. The rest of the satellite, the bus, supports the payload by providing a structure, power, commanding, and telemetry, an appropriate thermal environment, radiation shielding, and attitude control.
What is meant by a transponder?
Definition of transponder : a radio or radar set that upon receiving a designated signal emits a radio signal of its own and that is used especially for the detection, identification, and location of objects and in satellites for relaying communications signals.
What is transponder in DTH?
A number of foreign operators launching satellites with an India beam has led to a situation of a large capacity lying vacant in Ku-band transponders, meant for Direct-to-Home (DTH) companies. Based on these negotiations, the transponder capacities are contracted for Indian players.
How does a transponder work?
A transponder will send an identifying coded signal in response to a transmitted interrogation from a ground-based radar station. An air traffic controller can then view the identified blip on a screen and know who it is and provide direction to the flight crews maintaining adequate separation with other blips.
How many transponders are in a satellite?
Early Bird had just one transponder capable of sending just one TV channel. 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.
How do transponders work?
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 a payload system?
Payload Systems deals with not only the specific radio technologies and systems aboard a spacecraft tasked with delivering mission objectives, but also the supporting ground equipment and telecommunication systems through which spacecraft payloads are controlled and results communicated to mission control.