Remote seismic data acquisition unit for receiving seismic radio signals, having the capability of receiving both seismic data acquisition radio signals and GPS signals, uses a single antenna for receiving both types of signals, a signal splitter to separate the signals and a low noise amplifier to enhance the GPS signals. A GPS receiver/transmitter is incorporated within the housing for the seismic data acquisition system radio signal receiver.

 
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< NRZ and biphase-L formatted hexaphase modulated GPS transmission method

< Stand alone global positioning system (GPS) and method with high sensitivity

> User-controlled GPS receiver

> GPS controlled blaster

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