Hi,
Here is some sample code that we used to get the ERT working here:
Code:
import viz
viz.go()
NUM_FOB = 2
PORT_FOB = 1
#First tracker is the ERT, which does not contain tracking data
ert = viz.add('flockofbirds.dls')
#Second tracker is the actual sensor
bird = viz.add('flockofbirds.dls')
The trick is that the ERT is counted as a bird, so you need to set
NUM_FOB to 2 and the first sensor returned by the flock of birds represents the ERT. The second sensor will contain the bird data.