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LISA Pathfinder. Data Management Unit

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 Unidad de gestión de datos de LISA Pathfinder Unidad de gestión de datos de LISA Pathfinder Unidad de gestión de datos de LISA Pathfinder
 Unidad de gestión de datos de LISA Pathfinder
Unidad de gestión de datos de LISA Pathfinder
Unidad de gestión de datos de LISA Pathfinder
  • Client: European Space Agency (ESA)
  • Country: Spain
  • Start date: --
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The Laser Interferometer Space Antenna (LISA) is a joint ESA/NASA mission to detect and observe gravitational waves in space and thus verify Einstein's General Theory of Relativity.

The LISA core technologies are gravitational reference sensors, reactors that deliver micro-Newton thrust and laser interferometry. These technologies will be tested in space on the LISA Pathfinder Mission, which will comprise two instruments: the LISA Test Package (LTP) and the Disturbance Reduction System (DRS). Both of them will test the key "free-fall control" technology by means of test masses.

SENER performed the design, integration and verification of the LTP's Data & Diagnostics Subsystem, which includes:

  • The Data Management Unit (DMU) equipment with integrated software, tasked with:
    • Controlling the interferometer's stability.
    • Acquiring the scientific data for monitoring.
  • Diagnostic equipment:
    • Diagnostic sensors for monitoring the LTP's payload.
    • Sensor and actuation control.

The DMU performs:

  • The interface with the satellite's on-board computer.
  • The Data Processing Unit (DPU), the on-board computer that controls the LTP's operations.
  • Power Distribution Unit (PDU), responsible for the generation and distribution of voltages.
  • Data Acquisition Unit, DAU, which acquires the LTP's environmental parameters (temperature, magnetic fields, and radiation).
  • Characteristics:
  • On-board computer based on a TSC695F CPU processor with 64 K x 8 bit PROM memories, 256 K x 32 bit EEPROM and 512 K x 40 bit SRAM, plus two MIL-STD-1553 interfaces and three asynchronous SBDL ports.
  • Data acquisition system to take measurements on 12 temperature channels with noise better than 10 μºK/√Hz and 16 analogue channels with a noise better than 230 μV/√Hz at 1 mHz.

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