Posted By Bills on 12/31/2008 1:03 PM
Great pictures Ted. Whats the white disk on top of the cab? I'm guessing GPS.
Yep, you are correct; see the following:
Article, "GE watches its units from afar", Trains Magazine, August 2007, page 22" explains the roof top bubble devices.
Below are excerpts:
"Electro Motive has a similar monitoring program for its SD units."
Using GPS, the builder [GE] keeps tabs from a monitoring center in Erie, PA., where units are made"
"Under the plastic bubble atop General Electric units,[cab roof top]....is a system of communication devices that make sure signals get through no matter where the units are."
"Global Positioning Satellites locate the units (and mapping software helps GE personnel pinpoint their exact locations). Through a combination of satellites, mobile internet (Wi-fi) and cellular modems, the units are in almost constant contact with the center."
-Ted