Assertion: telescope's system | /r/CapableOf | achieve a strehl ratio of 90%
Facets:
value: at a wavelength of 2.2 micrometers
type: LOCATION
Source sentences:
text: The best systems so far built, such as SPHERE on the ESO VLT and GPI on the Gemini telescope, achieve a Strehl ratio of 90% at a wavelength of 2.2 micrometers, but only within a very small region of the sky at a time.