Galileo satellite engineering model testing

Paris, (PresseBox) - The Engineering Model of the Galileo In-Orbit Verification satellites has completed several phases of testing in cooperation with the ground segment and is now being prepared for electromagnetic compatibility testing.

The second in a series of System Validation Tests (SVT-0B1) has been executed from the Galileo Launch and Early Orbit Phase Operations Control Centre at CNES in Toulouse, France. A number of important tests were performed on the platform subsystems, including Attitude and Orbit Control System mode transitions, power subsystem and transponder functional tests and onboard computer tests.

The purpose of an SVT is to verify the ground infrastructure needed to operate the satellite during its mission, including the flight operations procedures.

Following completion of the SVT-0B1 tests, the Engineering Model (EM) satellite has been placed in its final, closedpanel configuration and transferred to the electromagnetic test chamber at Thales Alenia's facility in Rome. Here, the Integrated Satellite Test (IST) and electromagnetic compatibility (EMC) testing will be performed after a period of test development.

The purpose of the IST is to verify the satellite hardware and software function together as specified. The satellite EMC test will demonstrate the satellite's ability to function in the electromagnetic environment it will experience during ground, launch and flight operations - and, in addition, confirm that it does not generate any unwanted electromagnetic emissions.

Another import milestone was achieved when the EM payload was mechanically mated and electrically integrated with the EM platform. This paved the way for the IST and EMC test. The first SVT (SVT-0A) was conducted from the Galileo Ground Control Centre in Oberpfaffenhofen, Germany. The mission control team were able to send telecommands and receive telemetry from the EM satellite while it was in the Thales Alenia integration hall in Rome. All EM platform subsystems were exercised, including avionics, power, telemetry and telecommand, thermal control and propulsion.

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