Simulation parameters, representative for the Galactic-center observation of GRAVITY.
|Observation & hardware|
|star magnitude K||10|
|central wavelength λ||2.22 μm|
|telescope diameter D||8.2 m|
|baseline B||80 m|
|sampling frequency f||300 Hz|
|tracking run||100 s|
|# spectral channels||5|
|fringe-sensing algorithm||phase delay|
|Disturbances & noise|
|rms piston turbulence||10 μm|
|wind speed v||15 m s-1|
|# vibrations per baseline||8–10|
|rms piston vibration||200–240 nm|
|max. coh. throughput||0.007|
|rms tip-tilt deviation||14.6 mas|
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