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The objective of the ARTES 3-4 development is to design, manufacture and qualify an Engineering Qualification Model (EQM) of SSTL GMP-T power subsystem. This high power, low mass and low cost power system is targeted to address the Small GEO Satellite market with up to 6kW power capability.
Indeed, the GMP-T programme aims to support SSTL’s development of a high performance/cost ratio, European small GEO platform. It enables lower cost access to satellite communications for numerous applications, including those of societal benefit such as rural/remote broadband, internet access etc which directly address key UK TSB objectives.
The main issue to be addressed is:
The qualification of the GMP-T Power System will allow SSTL to bring the GMP-T electrical developments to a level where the design of the GEO platform can be confidently validated at system level.
The main goal of SSTL GMP-T platform development is to design, manufacture, and qualify an Engineering Qualification Model (EQM) of the GMP-T power subsystem.
The baseline power subsystem is based on the 700W SSTL GIOVE-A heritage design and aims to expand the GIOVE-A capacity to provide a total power of 6kW to the spacecraft at End of Life (allowing for 4.5kW payload power).
The final GMP-T power system will consist of a single regulated bus serving the payload and heaters and an unregulated bus serving the avionics.
The complete power system is divided into five main functional blocks:
Within the scope of this proposal, SSTL intend to qualify the power system functional blocks associated with the PCU, PPDU and BDMU.
Figure 1: GMP-T Platform
The GMP-T Power EQM development Kicked-Off in May 2010.