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Table 5

Variation of  during the night and between the nights.

Site Nn τc τ1.5
Armazones A 929 0.487 0.206 0.173 0.82 0.26
Armazones B 526 0.559 0.244 0.215
La Chira 202 0.495 0.240 0.191 0.82 0.18
Mauna Kea 577 0.501 0.232 0.169 0.48 0.21
Pachón 1770 0.488 0.243 0.149 2.36 0.37
Paranal A 1371 0.465 0.229 0.156 1.43 0.29
Paranal B 583 0.457 0.216 0.179 1.43 0.29
S. Pedro Martir 609 0.570 0.348 0.144 2.00 0.32
Shatdzhatmaz 712 0.621 0.451 0.106 0.97 0.68
Tolar 264 0.388 0.149 0.116 0.53 0.33
Tololo 630 0.460 0.258 0.113 1.00 0.45
Tolonchar 409 0.619 0.342 0.176  >10 0.27
Ventarrones 563 0.486 0.234 0.154 0.69 0.27

Notes. The time constants τc and τ1.5 are given in hours.

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