Вот тут какие-то обьяснения по поводу того как они собираются это делать. Некие инновационные технологии. Для проверки и будет запускаться технологический демонстратор.
https://indico.ict.inaf.it/event/726/contributions/3442/attachments/1657/3130/2_2018_11_19Tuthill_Toliman.pptx.pdf1. Obeserving Bright Binaries allows a small aperture
telescope to overcome the photon noise limit.
n 2. Astrometric errors are generally proportional to
reference angle. Binaries are much closer than field
stars (gain typical factor of 20-50)
n 3. The Diffractive Pupil removes most error terms
arising from distortion in the optical train. The
fundamental ruler element can be made monolithic,
thermally stable, and precisely monitored.
n 4. Naturally spreads the starlight over many pixels,
preventing detector saturation and at the same time
giving major statistical benefits in beating down noise
n 5. Doubly-Diffractive pupil locks down plate scale and
absolute wavelength reference (from atomic physics)
n 6. D-D pupil also delivers spectral monitoring –
potential for compensating stellar noise processes
n 7. Achieve required end-of-mission precision for
Earth-analogs with inexpensive design.
Ну и список тех кто этим занимется:
Sydney: data/concept (full sims ongoing; paper in prep)
Sydney: Astrophysical Noise Modeling (started)
NASA AMES: Optical Testbed (ongoing)
NASA JPL: detector characterization, possible flight metrology (TBD)
Japan/JASMINE: Strong collaborative links and technology transfer
Japan/AstroBiology Center: Established scientific partnership
