PosNet

Vessel and In-Water Positioning System

PosNet_4934_compupterPBX Systems LLC introduces PosNet, a GPS module for positioning seismic streamers.  PosNet is a lightweight, rugged, flexible and cost effective method of providing dependable sub-meter positioning whether shooting a complex 3D or a critical 3D project

PosNet is a stable and mature Windows PC based vessel and in-water GPS positioning system. It can be used to track multiple in-water targets such as gun and tailbuoy pods. PosNet has been used to position seismic vessels and in-water targets for 15 years. It was the first product to offer dual band GPS positioning to the offshore seismic industry and is still considered by many to be one of the best positioning tools available.

PosNet is operating on major 3D projects world wide, preventing down time when other systems fail.

  • Position the vessel to sub-meter accuracy using either proprietary dual frequency GPS corrections  or client provided RTCM.
  • Navigate without expensive 3rd party signals using a dual frequency vessel GPS receiver to typical 2.5m accuracy. It is used by clients to check other GPS positions on a vessel, especially when work in areas of marginal RTCM coverage.
  • Operate in full 3D or 3D height constrained mode using an in-built OSU table for geoidal separation.
  • Derive the position for over 20 in-water targets, to sub-meter accuracy, relative to the vessel  position .
  • Accepts data from 3rd party in-water hardware.
  • Stabilize the vessel position output by reducing the GPS antenna movement with the use of a system pith and roll sensor.
  • Derive vessel heading with the addition of a gun or tailbuoy pod on the vessel, on known baseline length
  • Interface to a local navigation system via Ethernet socket and provide vessel and target position as well as all raw data to populate a P2 file as required.
  • Generate a NMEA GGA position string for any or all derived positions as well as a NMEA heading output for the vessel
  • Provide ailbuoy tracking out to 10-15 kilometers using a UHF data link
  • Communicate with Gun pods using two wire pairs in the gun bundle. One wire pair is used for power and a second pair for data.  All pods self-configure beyond having an internal code switch set when the pod is first used on the vessel.