Mobile home of a guy who really, really like Dish TV? Nah, that's TARA or Transportable Atmospheric Radar), which is used to get over 200 premium channels .... er, in weather research.
http://www.tudelft.nl/live/pagina.jsp?id=a1b8bc64-e778-4449-a1a9-f39864ad9eef&lang=en
There should be a pair of stripey legs sticking out from under the trailer, and Dorothy stepping out the doorway.