Question

We've run into a problem in the design.

We originally thought we could measure the distance by measuring the "time of flight" between the tag and the anchor points. However, this requires the XBee radios to either give us an exact time stamp (to 300+ millionths of a second) of when messages are sent and when they arrive, or by having a very high resolution clock on both the tags and the Beaglebones (and then having the clocks calibrated when the system is deployed).