However, due to atmospheric turbulence effects, a degradation of the coupling efficiency is present when the beam propagates in free space. To reach such data rates, one of the most frequently considered approaches is to couple the received signal into an optical Single-Mode Fiber (SMF) and thus benefit from technologies developed for fiber links. The growth of optical links in free space leads to systems with data rates of tens of gigabits/s. The form of corrections in Meo telescope coding & residual curves match well to those of ISS angular velocities (on elevation and azimuth). At low elevation ( 20 arcsec) could cause a misalignment at telecom & scintillation detector which has a field of view of 48 arcsec. The difference between predicted and real coordinates of ISS is maximal at culmination: 230 arcsec (1.2 mrad) 70.4° elevation. Errors on elevation & azimuth between predicted & real coordinates of ISS, Residual of auto tracking corrections in functions of time & elevation The maximal corrections on the sky are 230 arcsec & 200 arcsec according to X & Y axis of camera, respectively.
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