Abstract: A system for spectral induced polarization measurement of a formation is provided. The system provides an intelligent module to be utilized in performing spectral induced polarization (SIP) measurements for geophysical studies or otherwise. The system includes a instrument that includes a housing configured to be inserted into a surface opening. The housing houses a signal generator that generates an excitation signal. A drive electrode directs the excitation signal into the material adjacent the housing. A plurality of electrodes sense the voltage and/or current in the material adjacent the housing and a processor processes the sensed voltage and/or current to measure a property of the material. The system also provides a configuration in which a plurality of instruments configured for spectral induced polarization measurements are interconnected to provide communication, synchronization, a common reference signal or power.

Abstract: A secure analog gateway is configured with a pipelined architecture for interfacing various types of analog devices with a digital communication network and enabling asynchronous bi-directional communication between the analog device and the digital communication network using, for example, standard transmission control protocol over internet protocol (TCP/IP) in a network mode of operation. The analog gateway is also capable of operation in a stand-alone mode of operation in which data from an analog device is stored locally for later retrieval by way of a network. The functionality of the analog gateway is segregated among multiple processing elements which each perform a specific part of the gateway's function.

Abstract: A secure analog gateway is configured with a pipelined architecture for interfacing various types of analog devices with a digital communication network and enabling asynchronous bi-directional communication between the analog device and the digital communication network using, for example, standard transmission control protocol over internet protocol (TCP/IP) in a network mode of operation. The analog gateway is also capable of operation in a stand-alone mode of operation in which data from an analog device is stored locally for later retrieval by way of a network. The functionality of the analog gateway is segregated among multiple processing elements which each perform a specific part of the gateway's function.