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Table 3.

H-band SR measurements during and in-between dithering sequences for various r0 and guide stars, along with mean dithering amplitudes.

SRs in and out of dithering
r0 MR Dith. 10 s 20 msec
cm Y/N SR (%) SR (a) (%) nm RMS (b)

14.5 0 N 77.2 76.9 ± 0.9
Y 77.2 76.9 ± 0.8 5.3
8.5 0 N 34.7 33.0 ± 3.4
Y 35.2 33.8 ± 3.2 5.9

14.5 16 N 36.6 35.5 ± 3.3
Y 36.0 35.1 ± 3.1 25.8
8.5 16 N 4.1 2.7 ± 1.1
Y 4.0 2.9 ± 1.0 25.1

Notes. Dith.: Yes (Y) for data during dithering and No (N) otherwise.

(a)

Computed from loop residuals with the Maréchal approximation.

(b)

Averages across the 20 dithering sequences.

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