Table 2 Maximum internode distance for PER 
%.
%.From: Development of a Testbed for Wireless Underground Sensor Networks
| Â |
| 0 dBm | +5 dBm | +10 dBm |
|---|---|---|---|---|
UG2UG | 55 cm | 55 cm | 85 cm | 95 cm |
UG2AG | 200 cm | 200 cm | 250 cm | 300 cm |
AG2UG | 15 cm | 25 cm | 55 cm | 85 cm |
3 dBm