AT&T has been upgrading their 3G towers to LTE ready equipment. They will be able to roll out LTE much much quicker than Verizon if they want to, and I expect they will be highly motivated. They already spent over $10 billion on additional frequency licenses alone, and billion...
The geometry parameters of the track are measured by the measuring equipment mounted on the trolley, such as inclinators, accelerometers, gyroscopes, odometers, laser scanners, total stations, Global Positioning System (GPS) receivers and so on, when the trolley moves on the track driven by ...