Electrical Engineering & Research Development

The Data Systems Group handles the scope of activities related to the generation, processing, transfer and reception of on-board information within the entire space-ground segments. This domain also oversees the spacecraft system architecture, hardware and software design and the integration of the various spacecraft subsystem interfaces to meet a mission's requirement.

In order for spacecraft to maintain their mission, the spacecraft altitude, orientation and position in space often require extremely precise management, performed by Attitude determination and control system. The Control Systems Group manages the spacecraft stimuli and response system.

It functions to guarantee that disturbances and 'anomaly' situations are handled correctly without disrupting the normal operation of the spacecraft. This group covers the activities related to the interactions of sensors, controllers and actuators that work to keep the system in a desired operational mode.

The RF subsystem is responsible for all the communications activities that take place between the onboard satellite and the Ground Station:

Provides reliable means for the downlink of telemetry/payload data from the onboard satellite to the Ground Segment.

Enables the uplink of telecommand from the Ground Station to control the onboard Satellite’s operations and status.

It is designed to be compatible with a Ground Station, which is tasked with the responsibility of: Propagating and tracking the position of the satellite per time to determine when it will pass over the ground station.

Receiving the payload data for further processing for the customer’s consumption.

Receiving the telemetry on the status of the satellite.

Sending telecommand to control the satellite.

Electrical currents induce electric and magnetic fields, which can cause interference and degrade spacecraft performance. And there are environmental threats that spacecraft designers must bear in mind.

Electromagnetics and Space Environment Electromagnetism and Space Environment covers two technical fields:

  • Issues of electromagnetic transmission, reception, propagation and interaction
  • Effects of the orbital environment.

  • All spacecraft require electromagnetic compatibility between their various equipment and subsystems, which demands a dedicated test campaign.

    Antennas are the single most sensitive satellite element to interference, because they operate by deliberately turning electromagnetic fields into electric currents and vice versa. The work includes modeling and testing how spacecraft designs might affect antenna performance, taking account of adjacent electrical fields, reflecting surfaces and other potential radio frequency interactions.

    Either used for communication between a transmitter and a receiver, for accurate positioning in navigation systems or as a mean to probe the environment as it is the case for remote sensing, electromagnetic waves do also interact in a complex way with the natural environment.

    Assessing the performance of satellite receivers combined with ground station antennas for telemetry, tracking and telecommand (TT&C) applications is another core activity.

    The natural space environment consists of high energy particle radiation, plasmas, gases, and particulates and the sub-domain “space environments and effects” includes evaluations of these environments and their effects on space systems.

    Power and Energy Conversion covers all aspect of power generation, storage, conditioning and distribution for space applications from the launch and early orbit phase to the end of life stage Most times the energy is generated from the conversion of solar energy via photovoltaic cells to electrical energy. It also includes the designs of power storage, conditioning and distribution for various missions.