Fig. 7

Histograms of coherence time, in seconds, for each of the baselines from the international stations to the tied station at Exloo. Coherence times of 1−3 min are typical. Note that the short baselines (DE601, DE605, DE609) have noticeably longer average coherence times. The baseline lengths, from shortest to longest, are: DE605 (226 km), DE609 (227 km), DE601 (266 km), DE603 (396 km), DE604 (419 km), DE602 (581 km), SE607 (594 km), UK608 (602 km), FR606 (700 km).
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