Accuracy is of course important, but perhaps more important is how we build in scaleable redundancy as the number of satellites reduce. It's very frustrating wh

Accuracy is of course important, but perhaps more important is how we build in scaleable redundancy as the number of satellites reduce. It's very frustrating when my sat nav or run keeper can't get a good signal, this inevitably leads to people dropping services or at least using them less. They key question is at what level is the service too compromised? and what's the next best alternative?