Ultra-Light Exploration Seismograph
The new Geode seismic recorder is the next generation of seismic recording
system, combining the best of traditional seismic recorders with the
flexibility and convenience of a distributed system. Place a Geode
module out on the line close to the geophones and eliminate long,
expensive analog cables. Never hassle with poor connections and bad roll
box contacts when doing a reflection survey. And when you are not using
the Geode for exploring, use it for monitoring earthquakes, quarry
blasts or vibration from heavy equipment.
For light-duty applications, you can use your laptop to view, record and
process your data. For more demanding applications where ruggedness and
reliability are key, use the Geode in combination with
The StrataVisor and laptop software have the same user interface, so
transition between configurations is seamless.
The Geode seismic module weighs only 8 lbs (3.6 kg) and comes with 25 m
of digital interface cable. Because getting the right answer is key, the
Geode is bundled with a suite of no-charge industry-standard
professional software that expands your capabilities for commercial or
The Geodes operate from either your laptop for occasional surveys or
StrataVisor NZ in harsh field
conditions where reliability counts
The StrataVisor NZ has a
daylight visible color screen, built-in plotter and is weather and
Multi-purpose seismic recorder: refraction, reflection, earthquake
monitoring, blast and vibration measurements
Light-weight (8 lb/3.6 kg), in-field module connects to your laptop
for small surveys or connects to StrataVisor NZ series seismographs
for professional applications in harsh environments
Available with 3 to 24 channels per module; connect more modules to
build low cost distributed systems
Data transmitted from Geode to host computer digitally, eliminating
noisy, expensive analog cables
Uses inexpensive refraction cables for local geophone connections
24-bit resolution, low distortion and built-in geophone and line
20 kHz bandwidth (8 to 0.02 ms sampling) allows ultra-high resolution
engineering surveys or earthquake monitoring
Bundled professional software gives quick answers:
Built-in first break picker and layer assignment
Industry-standard refraction analysis (SIPQC)
New refraction tomography (Optim)
Reflection processing (WinSeis-Lite)
Three year warranty
Standby low-power mode means light batteries, long life
Configurations: 3, 6, 8, 12, 16 or 24 channels in weatherproof field
deployable Geode module. Geode is operated from either Windows
95/98/NT based laptop or by ruggedized StrataVisor NZ field
computer. Single Geodes are operated using SGOS software, which
contains basic seismograph functions used for engineering surveys.
Multiple Geodes can be connected together to build systems with many
channels and many lines using MGOS software.
A/D Conversion: 24 bit result using Crystal Semiconductor sigma-delta
converters and proprietary over sampling.
Dynamic Range: 144 dB (system), 110 dB (instantaneous, measured) at 2
ms, 24 dB.
Distortion: 0.0005% @ 2 ms, 1.75 to 208 Hz.
Bandwidth: 1.75 Hz to 20 kHz. Low corner frequency option available.
Common Mode Rejection: > -100dB at <= 100 Hz, 36 dB.
Crosstalk: -125 dB at 23.5 Hz, 24 dB, 2 ms.
Noise Floor: 0.20 uV, RFI at 2 ms, 36 dB, 1.75 to 208 Hz.
Stacking Trigger Accuracy: 1/32 of sample interval.
Maximum Input Signal: 2.8V PP.
Input Impedance: 20 kOhm, 0.02 uf.
Preamplifier Gains: Software selectable between 24 and 36 dB.
Optionally selectable between 12 and 36 dB or jumpered to 0 dB(2) .
Anti-alias Filters: -3 dB at 83% of Nyquist frequency, down 90 dB.
Acquisition and Display Filters: Low Cut:OUT, 10, 15, 25, 35, 50, 70,
100, 140, 200, 280, 400 Hz, 24 or 48 dB/octave, Butterworth.
Notch: 50, 60, 150, 180 Hz and OUT, with the 50 dB rejection bandwidth
2% of center frequency.
High Cut: OUT, 250, 500 or 1000 Hz, 24 or 48 dB/ octave.
Sample Interval: 0.02, 0.03125, 0.0625, 0.125, 0.25, 0.5, 1.0, 2.0,
4.0, 8.0, 16.0 ms.
Correlation: Optional high-speed hardware correlator available in each
Geode for fast cycle time with vibrators and pseudo-random (MiniSosie)
Record Length:16,000 samples standard, 64,000 samples optional (2)
Pre-trigger Data:Up to 4,096 Samples.
Delay: 0 to 9999 ms in 1 ms steps
Data Transmission: Uses reliable Ethernet connections and requires no
custom transmission software. Interfaces directly with network
capabilities of Windows 95/98/NT.
Auxiliary Channels: All Geode channels can be programmed as either AUX
or DATA. Fixed data and aux channels available in StrataVisor DZ
Roll Along: Built-in, no external roll box required.
Line Testing: Real time noise monitor displays real-time output from
geophones. Optional geophones pulse test helps identify bad
geophones and shorted or broken cables (2).
Instrument Tests: Optional built-in daily, weekly and monthly testinga
vailable External laboratory quality oscillator available to measure
noise, crosstalk, dynamic range, gain similarity and trigger
accuracy to factory specification.
Data Formats: SEG-2 standard with SGOS. SEG-D and SEG-Y available
Single Geode Operating Software (SGOS): Includes full compliment of
acquisition, display, plotting, filtering and storage features. Multiple
Geode Operating Software (MGOS): Allows single laptop to control
multiple Geodes and adds additional preamp gains, correlation, expanded
record length, tape writing, geophone pulse test, expanded test and
diagnostics and roll along capability. StrataVisor NZ Software:
Functionally similar to MGOS above but operates on ruggedized NZ field
system. Data Storage: Stores data locally on laptop hard drive for
transfer to portable media.
Plotters: Drives a variety of NT compatible printers including Printrex
4, 8 and 12 inch plotters. Consult factory.
Triggering: Positive, negative or contact closure, software adjustable
threshold. Power: Requires 12V external battery. Uses 0.65W/channel
during acquisition, sleep mode reduces power consumption by 70% while in
standby. Environmental: -30 to 75 degrees C. Waterproof and submersible.
Withstands a 1 m drop onto concrete on 6 sides and 8 corners. Physical:
10 3/4"L x 9 3/4"W x 7"D (27.3cmL x 24.75cmW x 17.75cm) Operating
System: Windows 95/98/NT. Data Processing and Interpretation: Includes
refraction software with first break picking, layer assignment, depth
below each geophone using delay time, refraction tomography and
reflection processing software. Consult Terraplus for individual data
1- Laptop computers are NOT field devices. They are easily damaged by
harsh treatment or exposure to extreme environments. They have a short
battery life. StrataVisor NZ is designed to operate in harsh conditions
for extended periods and should be used with the Geode for professional
surveys when reliability is important.
2 - Available with MGOS software only