Table 2: Methods of $\tau _0$ measurement.

Method		 Measurables d, m Problems Reference

SCIDAR		 Cn2(h), V(h) >1 Needs large telescope Fuchs et al. (1998)
Balloons Cn2(h), V(h) none Expensive, no monitoring Azouit & Vernin (2005)
AO system r0, $\tau _0$ >1 Needs working AO Fusco et al. (2004)
SSS Cn2(h), V(h) >0.4 Low height resolution Habib et al. (2006)
GSM r0, V, $\tau_{AA}$ $4\times0.1$ No obvious relation to $\tau _0$ and t1 Ziad et al. (2000)
MASS $\tau_0^*$ 0.02 Biased (low layers ignored) Kornilov et al. (2003)
DIMM r0 0.25 Indirect $\tau _0$ estimate Sarazin & Tokovinin (2002)
FADE r0, t1 0.35 New method This work

Source LaTeX | All tables | In the text