EAS Geophysical Instrumentation and Facilities

High Precision GPS:

• 5 - Campaign GPS units: each with zephyr ground plane antennas and Trimble R7 receivers, with power/antenna/download cables.
• 5 - Continuous GPS units: each with zephyr ground plane antennas and Trimble NetRS receivers.
  1. 2 (CDVV, PDBG) were installed over the Socorro Magma Body, near Socorro, NM in November 2005.
  2. 2 (KERA, NOMI) were installed over Santorini Caldera, Greece in May 2006.
• 2 - Dorne-Margolin Choke-Ring Antennas for continuous or campaign GPS measurements.
• 1 - Trimble Kinematic post-processing GPS backpack system, usable with one of the 5 campaign GPS units.
• 1 - Magellan post-processing differential GPS system (Base + roaming receivers)

Broad-Band Seismic Instrumentation:

• 5 - Guralp CMG-3ESP seismometers
• 5 - Guralp CMG-6T seismometers
• 12 - Guralp CMG-PEPPV seismometers (on loan to high schools and related institutions)
• 1 - Guralp CMG-DM24S3/DCM 3-channel data comm. module
• 10 - RefTek 130 Data-loggers
• 4 - RefTek 72-A07 Data-loggers
• 8 - RefTek 4Gb external disks
• 14 - GPS clocks (10 with on-board receivers)
• 1 - HP palmtop computer

Short-Period Seismic and Acoustic Instrumentation:

• 1 - 12 channel geomatrix digital refraction line and data recorder
• ~30 - commercial 15 Hz geophone strings
• ~25 - 1.0 Hz geophones (vertical and horizontal)
• 2 - acoustic sensors (owned by the Georgia Tech Research Institute)

Other Geophysical Instrumentation:

• 1 - LaCoste Romberg model g land gravity meter
• 4 - magnetometers:
  - Relative: 1 Schmidt (vertical; museum piece), 1 McPhar fluxgate (directional)
  - Absolute, total field: 1 Geometrics G856AX, 1 GM126 Barringer(?)
• 2 - DC resistivity meters
• 1 - Syscal Kid resistivity string
• 2 - Electrical Conductivity Sensors (EM-31,-34)

Additional power, Recording, and Field gear:

• 15 - PDAS-100 DASs
• ~5 - smoke paper recorders
• 2 - tape geophone recorders
• 1 - Garmin 60CS Handheld GPS
• 4 - field weather protection boxes (~0.5 m^3)
• 4 - 12-volt/deep cycle battery chargers
• Solar Panels:
  - 8 - 30W (2.5A @12v) (4 panels 10"x12";collapsible for deployments less than ~1 week)
  - 11 - 3W (250mA @12v) 12" x 18"
  - 1 - 12W (1A @ 12v) 12" x 48"
  - 6 - 12W (1A @ 12v) 24" x 24"
  - ~6+ - 12W (1A @ 12v) 24" x 24" at field sites
  

Geophysics Laboratory:

• Approximately 500 sq-ft
• Unix/Linux computers: 1 Sun Ultra 60, 9 Linux PCs (7-64bit)
• PC: 3 Windows PC computers running XP (1 64bit, other 2 are dual boot with linux)
• SGI Altix linux 16 processor cluster with 16GB shared memory and 5TB data storage
• Printers: HP Laserjet 4000 B&W, HP Color Laserjet 4650, HP Designjet 755cm (36in plotter)