Table 2 Maximum internode distance for PER 
%.
%.From: Development of a Testbed for Wireless Underground Sensor Networks
 3 dBm
| 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 |