DAB is an optimal carrier for DGPS data:

• It provides sufficient transport data rates to
  allow high-precision positioning services (RTK),

• Transmission is very reliable,

• Good coverage in both cross-country and urban environments,

• No interconnection fees (unlike GSM)

• Modern DAB reception technology enables small, 
  low-powered and inexpensive receivers,

• Transmission technology allows for sharing the
  DAB-DGPS network with other industrial services.