EC8094
SATELLITE
COMMUNICATION
Course Instructor: M.Lingeshwaran M.E.,(Ph.D.)
, UNIT II
SPACE SEGMENT
▪ Spacecraft Technology – Structure
▪ Primary power
▪ Attitude and Orbit control
▪ Thermal control and Propulsion
▪ Communication Payload and supporting subsystems
▪ Telemetry, Tracking and command
▪ Transponders
▪ The Antenna Subsystem
, Introduction
▪ A satellite communications system can be broadly divided into two segment
ground segment and a space segment.
▪ The space segment will obviously include the satellites, but it also includes
ground facilities needed to keep the satellites operational, these being referre
as the tracking, telemetry, and command (TT&C) facilities.
▪ In many networks it is common practice to employ a ground station solely fo
purpose of TT&C.
▪ The equipment carried aboard the satellite also can be classified accordin
function.
▪ The payload refers to the equipment used to provide the service for which
satellite has been launched
, Introduction
▪ The bus refers not only to the vehicle which carries the payload but also to
various subsystems which provide the power, attitude control, orbital con
thermal control, and command and telemetry functions required to service
payload.
▪ In a communications satellite, the equipment which provides the connecting
between the satellite’s transmit and receive antennas is referred to as
transponder.
▪ The transponder forms one of the main sections of the payload, the other being
antenna subsystems.
SATELLITE
COMMUNICATION
Course Instructor: M.Lingeshwaran M.E.,(Ph.D.)
, UNIT II
SPACE SEGMENT
▪ Spacecraft Technology – Structure
▪ Primary power
▪ Attitude and Orbit control
▪ Thermal control and Propulsion
▪ Communication Payload and supporting subsystems
▪ Telemetry, Tracking and command
▪ Transponders
▪ The Antenna Subsystem
, Introduction
▪ A satellite communications system can be broadly divided into two segment
ground segment and a space segment.
▪ The space segment will obviously include the satellites, but it also includes
ground facilities needed to keep the satellites operational, these being referre
as the tracking, telemetry, and command (TT&C) facilities.
▪ In many networks it is common practice to employ a ground station solely fo
purpose of TT&C.
▪ The equipment carried aboard the satellite also can be classified accordin
function.
▪ The payload refers to the equipment used to provide the service for which
satellite has been launched
, Introduction
▪ The bus refers not only to the vehicle which carries the payload but also to
various subsystems which provide the power, attitude control, orbital con
thermal control, and command and telemetry functions required to service
payload.
▪ In a communications satellite, the equipment which provides the connecting
between the satellite’s transmit and receive antennas is referred to as
transponder.
▪ The transponder forms one of the main sections of the payload, the other being
antenna subsystems.
