Subsystems[edit]
In addition to the five main instruments, nine avionic subsystems were allocated to the bus module.[2] These were the Communication and Data-Handling Subsystem (C&DH), Inter-Orbit Communication Subsystem (IOCS), Mission Data Processing Subsystem (MDPS), Optical Data Recorder (ODR), Electrical Power Subsystem (EPS), Paddle Subsystem (PDL), Attitude and Orbit Control Subsystem (AOCS), Reaction Control Subsystem (RCS), and the Direct Transmission Subsystem (DTL).[2]
The C&DH subsystem received and decoded the satellite's tracking control command signals and acted as a processing interface between the instruments. It was capable of adjusting settings on the instruments – such as temperature and voltage. The IOCS was used to communicate with data relay satellites (see Data transfer).[2]
The MDP device formatted mission data to be sent via the IOCS, and would process it into a data packet.[2] The ODR was a large-volume storage device that used an optical magnetic disk system.[2] The EPS provided power to the satellite's subsystems. The PDL managed the satellite's solar panel, and transferred electrical energy to the EPS. The solar panel was capable of generating 5 kW using 55,680 cells on a jointed mast.[2]
The AOCS was used to establish the attitude control following the satellite's deployment from the rocket. It was subsequently used to adjust the satellite's attitude, orbit, and solar paddle. The AOCS was equipped with a number of attitude sensors, including a control-standard unit (IRC), an Earth sensor (ESA), and a fine sun sensor assembly (FSSA).[2]
The RCS was used to generate propulsion power for attitude adjustments after deployment and control orbit using data from the AOCS.[2]
Subsystems[edit]In addition to the five main instruments, nine avionic subsystems were allocated to the bus module.[2] These were the Communication and Data-Handling Subsystem (C&DH), Inter-Orbit Communication Subsystem (IOCS), Mission Data Processing Subsystem (MDPS), Optical Data Recorder (ODR), Electrical Power Subsystem (EPS), Paddle Subsystem (PDL), Attitude and Orbit Control Subsystem (AOCS), Reaction Control Subsystem (RCS), and the Direct Transmission Subsystem (DTL).[2]The C&DH subsystem received and decoded the satellite's tracking control command signals and acted as a processing interface between the instruments. It was capable of adjusting settings on the instruments – such as temperature and voltage. The IOCS was used to communicate with data relay satellites (see Data transfer).[2]The MDP device formatted mission data to be sent via the IOCS, and would process it into a data packet.[2] The ODR was a large-volume storage device that used an optical magnetic disk system.[2] The EPS provided power to the satellite's subsystems. The PDL managed the satellite's solar panel, and transferred electrical energy to the EPS. The solar panel was capable of generating 5 kW using 55,680 cells on a jointed mast.[2]The AOCS was used to establish the attitude control following the satellite's deployment from the rocket. It was subsequently used to adjust the satellite's attitude, orbit, and solar paddle. The AOCS was equipped with a number of attitude sensors, including a control-standard unit (IRC), an Earth sensor (ESA), and a fine sun sensor assembly (FSSA).[2]The RCS was used to generate propulsion power for attitude adjustments after deployment and control orbit using data from the AOCS.[2]
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