While the field workers are out collecting data, the base station may go down without their knowledge. They would then return from their trip to find that there are no correction signals. At this point, they would have to go back into the field and redo their data collection. Another disadvantage is that post processing software has to be set up on a desktop machine, someone has to be trained to operate it, and then all of the data has to be processed. With real time, the data is already stored with the high accuracy positions.
Real time is just like having a highly accurate normal receiver.
We have compiled information on real time Differential service coverage , including maps where possible, that we try to keep as complete as we can. They are only to give an indication of the extent of GPS coverage. Racal LandStar More info, and a link coming soon . More info, and a link coming soon . More info, and a link coming soon .