I successfully transmitted live GPS data between DNT900 radios!
The remote radio is under Arduino control where I built a DNT900 library to interact with the radio. This allows the main program to capture GPS data, format it for transmission, and transmit it to the base.
The base radio has a similar DNT900 library in C#. The program, a prototype for a larger data management program, captures and displays the GPS data sent from the remote. The transmission distance was about two meters.
The transmission of live GPS data has been a goal since last December. With this milestone, I am planning next steps. Certainly the end result is a PC board, however I want to evaluate longer distances, and provide for peripheral devices (limit switches, temperature probes, pressure sensors, and the like).