Thanks to David Hallstrom, Irene DeBlasio, Michael Segal, Robert Godwin, Kirk Pulley, Michele Schiesser, Ethel Fenig, Wes VanFleet, John Williamson, Dave Grambo and Eric Jensen.
That white dome atop the van, which is similar to the device that'll soon be mounted on JetBlue's fleet, maintains a constant connection by rotating instantly as the van moves -- if the vehicle's heading changes, the antenna array will turn, too, so it's always pointed directly at the sat in the sky.