GEM-2A HEM SYSTEM
▪ The System ▪ Data Examples ▪ Stinger ▪ Posters ▪ Frequently asked questions ▪
Download Software
GEM is a Registered Trademark
▪
Programmable Frequencies
▪
Light Weight
▪
▪
Easy to Transport
▪
Simple to Fly
▪
No Onboard Operator
Great Data!
Current bandwidth of 330Hz to 96kHz
Passive powerline monitoring
Coherent drift characteristics among frequencies
Spectral integrity for anomaly classification and discrimination
Tolerance to sferics and powerline noise
Light tow-body with minimal cockpit hardware to fit in a small helicopter
Technical Specifications:
Total Length 643 cm (21.1ft)
Weight 110 kg (230 lb)
Tow Cable Length 30 m (100 ft)
Power Supply 28 VDC
Frequency Range 330 Hz to 96 kHz
Programmable
typically 5-8 frequencies
Sampling Rate 30 samples/sec
Horizontal Coplanar Coils:
TX-RX Separation 510 cm (16.7ft)
Transmitter Moment 400 A×m² at 330 Hz
Coaxial Coils
TX-RX Separation 592 cm (19.4 ft)
Transmitter Moment 200 A×m² at 330 Hz
Output: Inphase and quadrature in ppm
Apparent conductivity
Magnetic susceptibility
Powerline amplitudes
Realtime GPS input for pilot navigation
Program upload and data download: WinGEM
Ppm to conductivity and susceptibility conversion
1-D layered earth inversion
Geophex, Ltd. 605 Mercury St., Raleigh. NC 27603, USA; (919) 839-8515