The 25 MHz unshielded antennas are made for deepest possible penetration depths. The light-weight, low frequency 25 MHz antennas are commonly used for geological and stratigraphical surveys in open terrain.
The 25 MHz unshielded antennas are made for deepest possible penetration depths. The light-weight, low frequency 25 MHz antennas are commonly used for geological and stratigraphical surveys in open terrain.