Trimble REF TEK 125A-03 Seismic Recorder

  • Low power 24-Bit ADC: 
  • Powered from 2 “D” cell batteries
  • Small and lightweight 
  • Sealed aluminum case
  • Solid-state data storage 
  • Time base stability 0.1 ppm 
  • GPS synchronization 
  • Industry standard high-speed (480Mbit) USB 2.0 interface 
Product Resources
  • Overview

  • Lithosphere Experiments

  • Applications

The 125A Miniature Seismic Recorder "Texan" is an important advancement in the seismology industry. The Texan's self-contained, compact design allows greater flexibility and the ability to easily integrate into system operations.

In crustal scale refraction experiments, hundreds of instruments are deployed over several hundred kilometers for two to four days' duration. Recordings are made based on pre-set time windows at a rate of 100 samples per second (sps). Because explosions are typically being recorded, a maximum of 50 time windows of 120-second duration will also be recorded. The Texan's data storage requirement for this application is about 2 MB. Timing accuracy for the four day period must be within -/+5 msec relative to the shot time.

For crustal scale reflection experiments, instruments are deployed for three to five days with six to eight hour continuous recordings using a vibrator energy source. After each day's recording, data is downloaded, and the Texan is initialized for the next day's recording. Time accuracy must be within 2 msec since the data may be stacked.
Links to Lithosphere experiments conducted with REF TEK Texans:
 Alps 2002 International Seismic Experiment 

 IRIS Deployment in California, 2000 

 IRIS Deplyment at Hill AFB, UTA, 2002 

 IRIS Deployment in New Zealand, 2001 

 IRIS Deployment in Venezuela, 2001 

  • Active source crustal studies
  • Refraction and reflection 
  • Exploration 3-D noise testing 
  • Tomographic arrays 
  • Aftershock studies 
  • Micro-zonation survey