Here are some of the articles that have been recently posted to the PASSCAL website:

Emlid Reach RS2/2+/3 GNSS/GPS receivers

 Emlid Reach RS2/2+/3 receivers enable georeferencing for a wide range of geoscience and geophysics applications. Survey points can be used to generate topographic data sets, to determine the position of other surveys (e.g., seismic nodal arrays, seismic refraction profiles, ground penetrating radar, electrical resistivity), or to record data collection points (e.g., sample locations).

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Batteries

Batteries are PI Supplied.

Batteries come in two main types, primary which are single use and secondary which are rechargeable.

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Controlled Sources

The Propelled Energy Generator, model: PEG-40Kg

RefTek RT 130 Datalogger

The RT130 is a 3 or 6 channel high resolution datalogger. It is low power and highly configurable for a wide range of applications and sensors. It is housed in a plastic clamshell-style enclosure which is nearly waterproof and has internal data storage in the form of two compact flash cards. The RT130 can simultaneously record to the CF cards and transmit data in near-realtime using either ethernet or serial based telemetry. It has built-in sensor controls, scheduled mass recentering, and calibration functions. The RT130 is programmed with a PalmOS program called PFC-130 via the serial port.

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Multi-Channel Dataloggers

EPIC’s current inventory of multi-channel dataloggers, which now serves as our primary system for active source surveys using geophones, is centered around the ES-3000 Geode and a 60 Channel Strata View NZXP.  The ES-3000 offers reliable performance, portability, and compatibility with EPIC’s existing multi-channel cable systems, originally designed for earlier Geometrics models.

4.5Hz High Frequency Single Component Sensor

Salient Features These single component geophones are available as vertical 6-channel strings for use with the multi-channel digitizer systems.  The multi-channel strings are rarely used. This single channel vertical geophone has a frequency of 4.5Hz, damping of .707 critical and a sensitivity of 100 V/m/s. The primary use of these geophones is for active source experiments. Manufacturer Documents: EPIC’s 4.5Hz, vertical geophones were manufactured by Geospace under part number GS-11D. Installation & Troubleshooting:

 Installation requires a separate bubble level to be placed on top of the geophone for proper leveling.

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