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StrataVisor NX Seismic Recorder

Geometrics'  StrataVisor NX  seismic recorder, combines the highest available 24-bit A/D performance with fast, easy to operate software for any seismic application. The StrataVisor is Geometrics premier marine acqusition system, boasting a near-zero dead time between shots to maximize boat speed and minimize survey cost. An impressive array of quality control software ensures your data is correct and  complies with you and your client's requirements.

StrataVisor NX Applications:

  • high resolution marine surveys, from 12 to 600 channels
  • tectonic studies
  • teaching and research
  • monitoring

The StrataVisor can be deployed with multiple processors so several tasks can be handled independently. Multiple tape drives, integration of position data, plotting near trace gathers, controlling multiple printers and on-the-fly brute stack are all handled simultaneously.

The NX is available in two formats, a 12 to 132 channel rack mount system and a 12 to 60 channel ruggedized portable.

Shell approved rack-mount 12 to 132 channel module with built-in controller and tape interface

Ruggedized 12 to 60 channel 12V portable, with built-in printer, color screen and high speed hardware correlator

Features:

The StrataVisor NX hardware and software have been honed by years at sea. By listening closely and responding quickly to the requests of customers and their clients, the NX has features that provide timely and accurate information to maximize data quality and minimize down time.The NX has been inspected by Shell Petroleum and has been approved for their surveys.

  • Fast: near zero dead time between shots
  • Bulletproof: stable, proven software with years of survey time
  • Industry standard: over 50 systems in operation; ask for our customer list
  • Separate, user definable windows monitor each process
    • shot display
    • fixed offset gather
    • real-time brute stack
    • tape status on all drives
    • interactive observer's log
    • gun energy bar graph
    • trigger timing bar graph
    • spectral analysis
  • Real-time waterfall and bar graph noise displays.
  • Auto-switching of up to 6 tape drives, dual tape writing.
  • Visual and audible operator--defineable alarms.
  • "Sure-Save" algorithm eliminates lost shots, keeps data sequential even when all tape  drives fail.
  • Real-time integration of navigation, gun and streamer positioning data to tape header.
  • Recording parameters changeable during acquisition
  • Drives multiple printers
  • Fully automated test testing with separate factory grade oscillator

NX Software:

StrataVisor NX software undergoes frequent refinement to accomodate on-the-job suggestions from our customers. Below is a list of many of the software features that our customers swear by that help them collect data faster, more accurately and with less repeated lines or down time. Click on the linked features to show a screen capture and detailed description of the feature.

User Definable Windows

  • Shot Window
  • Gather Windows
  • Brute Stack Window
  • Noise Bar Graph Window
  • Noise Waterfall Display
  • Gun Energy Bar Graph
  • Shot Timing Bar Graph
  • Tape Status Window
  • Alarms Display

NX Specifications:

Interface WIth External Devices

  • Serial Input from navigation, gun controller, birds and compasses
  • Serial output to external devices

Tape Status and Writing

  • tape status window
  • 'Sure Store' tape buffering algorithm
  • real-time tape backup copy
  • tape drive switching
  • tape formats

Operator Alarms

  • Alarms Setup Window
  • Overdriven channel warning

Utilities

  • Tape reading utility
  • Roundup utility

A/D Conversion:

24 bit A/D conversion using  Crystal Semiconductor sigma delta 2nd generation converters

Dynamic Range:

144 dB  theoretical, 125 dB (instantaneous measured) @ 2 ms, 0 dB

Distortion:

0.0003%  @ 2 ms, 0.3 to 206 Hz

Bandwidth:

 0.3 to  1.7 kHz (Lower frequency options available)

Common Mode Rejection:

>  -110 dB @ <= 100Hz, 48dB

Crosstalk:

-120 @  100 Hz, 0 dB

Noise Floor:

0.18  uV, RFI @ 2 ms, 3 to 206 Hz

Trigger Accuracy:

1/128  of sample interval

Maximum Input Signal:

10 V,  P-P, at 0 dB

Input Impedance:

20 kOhm, 0.02 uf

Preamplifier Gains:

0, 24,  36, and 48 dB

Anti-alias Filters:

82% of  Nyquist, down 130 dB

Sample Interval:

0.25,  0.5, 1.0,2.0, 4.0, 8.0, 16.0 ms

Record Lengths:

16,000  samples / channel standard, 64,000 to 128,000 samples optional, independent of the number of channels.

Line Testing:

 Real-time noise monitor, pulse diagnostics.

Power Consumption:

40 W  plus 0.8 W per channel

Data Formats/Storage:

SEG-Y, SEG-2, SEG-D 8048 AND 8058. Operates with DAT, DLT, Exabyte, 3480, 3490, 3590, 9-track, Optical and hard disk storage through SCSI interface.

Pretrigger Data:

Up to  4096 samples.

Stacker/Correlator:

Full  32-bit Hardware DSP Correlator operates before or after stack. Minisosie option available to condition pilot.

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. Display filters do not affect data.

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

Processor:

Single or Dual Pentium based processors available. Consult factory for current speeds.

Automatic Gain Control:

Digital  AGC with user adjustable window. Display only - does not affect raw data.

Number of channels:

12 to  60 channels per portable module, 12 to 132 channels per rack mount module. Modules connect to create systems up to 600 channels. Larger systems available.

Auxilliary Channels:

Channels can be programmed as either AUX or DATA.

Plotters:

Drives a variety of NT compatible printers including Printrex 8 and 12 inch plotters. Supports multiple printers simultaneously for shot, gather and log files. Consult factory.

Triggering:

 Positive, negative, or contact closure, software adjustable threshold.

Delay:

0 to 9999 ms in 1 ms steps

Environmental:

-10 to 40 degrees C. Portable will operate in a light rain. Resists heavy shock and vibration. Passes MIL810E specification.

Operating System:

Windows NT

Display:

Built-in 480x640 LCD display, will drive external monitors at 600x800. Higher resolutions to 1024x768 available on external monitors by disabling internal screen. Contact factory to discuss your configuration.
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