U3B-13 uses callsign VE3KCL and telemetry channel 04. The map below will show live tracking, but there is no tracking available after dark and when the battery has discharged.
A few notes from Dave on the U3B-13 flight:
"a light one with no battery... hope to be able to float over 10km with one clear Chinese balloon.
GPS is SIM28M
Total weight should be below 6g