
Handheld In-Mine Radio Tomography Systems (IM)
- IM-RIM-2: permissible, analog RF, 22.5kHz to 972.5kHz, non-coherent
- IM-RIM-4: non-permissible, analog RF, 30kHz to 890kHz, coherent
- IM-RIM-5: non-permissible, digital RF, 2.5kHz to 1.7MHz, coherent

For more information on Stolar's radio geophysics, please contact Joseph Duncan at: jtd@stolarhorizon.com