A test-bed for space interferometry: Space Platform Interferometer (SPI)

Details A test-bed for space interferometry: Space Platform Interferometer (SPI) A test-bed for space interferometry: Space Platform Interferometer (SPI)

Aug 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987esasp.273..197f&link_type=abstract

In ESA, ESA Workshop on Optical Interferometry in Space p 197-204 (SEE N88-10613 01-74)

Physics

Optics

Michelson Interferometers, Space Platforms, Spaceborne Astronomy, Adaptive Optics, Signal Stabilization, Spacecraft Performance

Scientific paper

The Space Platform Interferometer (SPI), a 20-m two-mirror Michelson interferometer, which can reach magnitude 14 at UV and visible wavelengths, is described. The SPI is attached to a platform serviced from the space station. In addition to its ability to produce unique science in the UV, SPI is intended to demonstrate the feasibility of larger projects in the field. Dynamical behavior of the structure in the gravity gradient environment and fringe stabilization at low photon rate are studied by picking up an adjacent bin (in the near IR) on the same object and using it to track the white light fringe in a separate differential interferometer. The same subsystem also corrects for tilt. Active control of critical parameters ensures optical rigidity. Performances are evaluated in low orbit.

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