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There is a bit more information in mission statement.

A ground station at 10000 feet altitude on the mountain on the island of Maui, surrounded by ocean may have the satellite in range for eight minutes.

Ok yeah but I was talking best case for us mere mortals that have some of a horizon and aren't 10k feet up in the air :)

As a ham operator I worked sats a lot and 5 mins is the best pass I'd get even if I'd go outside on a hill for it.