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All Tables

- Table 1:
Computational requirements for various orders of adaptive optics systems.
*D* and *d* are the telescope diameter and the inter-actuator distance given in meters,
and
are the number of DMs and WFSs (>1 implies MCAO), *n* is the total number of actuators, the column "
'' gives the required real-time processing power in Gflops for the matrix-vector multiplication, the column "comp. *E*'' gives the required number of floating point operations
for computing the reconstructor, and the last column gives the required storage space for *E* in Gb. A Shack-Hartmann type WFS with a Fried geometry of actuators was adopted for the calculations, so that the total number of measurements is
,
and the wavefront reconstruction rate was set to 1 kHz. An inter-actuator distance of one meter corresponds roughly to *r*_{0} at 2.2 m, and *d*=0.25 approximately to *r*_{0} at 0.7 m.
- Table 2:
Discrete 4-layer model for atmospheric turbulence -
*h* is the layer altitude,
is the fractional turbulence strength per layer, and *v* is the wind speed.
- Table 3:
Observational and system simulation parameters.
- Table 4:
Estimated exponents
in a power-law fit of
.
- Table 5:
Strehl ratio simulation results for 2-DM MCAO system with 5 NGSs or 5 LGSs and three different turbulence outer scales
*L*_{0}. For the case *d*=0.5 m (left-hand side of table), the square field of view defined by the guide stars measured 40 arcsec in the NGS case and
36 arcsec in the LGS case. For the *d*=0.8 m case, the field was 67 and 60 arcsec for the NGS and LGS simulations.