The article, as ugh points out, that it is very much unencumbered with facts.<p>Here are some references that talk about the process in general: <a href="http://www.arrl.org/frequently-asked-questions" rel="nofollow">http://www.arrl.org/frequently-asked-questions</a><p>There are other references available on that page.<p>Several of the ISS crew are licensed amateur radio operators, and they will be available on the air as their work schedule permits. Often contacts are scheduled with school classrooms, as noted <a href="http://www.arrl.org/ariss-contact-stories" rel="nofollow">http://www.arrl.org/ariss-contact-stories</a>.<p>So part of the problem is the angular velocity of the station as seen from earth, but with omni-directional antennas on the ground, that is not a significant obstacle. The biggest obstacle is the work schedule of the crew.