SpaceTech has developed and deliverd the Deployable Solar Array Panel (DSAP) system for the ESA mission Sentinel-5 Precursor under a contract by Astrum U.K. Ltd. The DSAP consists of

  • 3 solar generator panels including the photovoltaic assembly
  • the solar panel deployment mechanisms

Each of the three panels on the spacecraft consists of 2 section with 15 strings of 19 cells each. As the design of the deployment mechanisms do not require any front side inserts, the area can be fully used for an efficient and straight-forward cell laydown. In addition to the cells temperature sensors for housekeeping purposes as well as bleed resistors for controlled insulation with the spacecraft body are accommodated on each panel.

DSC03929 normS5P Solar Panel String Layout

Third generation AZUR cells with a rated efficiency of 28 % are used to make up the photovoltaic assembly. Each cell is protected with a by-pass diode and each solar string by a blocking diode.

Performance

The flight models of the Deployable Solar Array Panels were delivered to Airbus in the last September 2014.

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The Sentinel-5 Precursor mission (S5p) is part of the Global Monitoring for Environment and Security initiative (GMES), which is a joint undertaking of the European Community and the European Space Agency (ESA). The S5p spacecraft, which will be developed under the auspices Astrium U.K. Ltd, is flying in a Sun Synchronous near-polar orbit of 820km altitude and 13.35 ascending node time. The spacecraft is scheduled for launch in 2015.

The project work is/was carried out under a programme of and funded by the European Space Agency (ESA). The view expressed herein can in no way be taken to reflect the official opinion of the European Space Agency.

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