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  MAJU GEOHYDRO SDN BHD
   
 

Unit B-8-3, Megan Avenue II
Jalan Yap Kwan Seng
50450 Kuala Lumpur.
Tel: +60 (3) 2171 1869
Fax: +60 (3) 2166 3869

Email: mghsurvey

   
 

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Services
   
  Precision positioning
 
 
  The operation of offshore oil and gas production is constantly requires the support efforts from a great diversified of marine vessels, rigs, structures and Floating Production Storage Offloading (FPSO). For that reason, the availability of precise and reliable positioning is absolutely needed. To meet this critical requirement, offshore positioning is typically based on Differential GPS (DGPS). Most construction and diving support operations, Remotely Operated Vehicles (ROV) and underwater surveys, pipe laying and others critical survey applications generally require 3 to 5 meter accuracy. Thus, DGPS is a key technique in these demanding conditions. MGSB offers professional GPS solutions which ideally suit for offshore survey positioning applications. MGSB provides OmniStar DGPS, C-Nav DGPS and any other DGPS systems which preferred by clients. The DGPS system will be integrated to the state of art positioning and navigation computer system with QINSy survey software. We adopt the latest technology to provide precise navigational data for you.
   
  OmniStar DGPS System
 

OmniSTAR is the world's market leader in providing DGPS enhancement data via satellite. With Worldwide coverage, 70 reference stations around the globe, and 3 network control centers, it is a highly reliable positioning service. The OmniSTAR service owned by Fugro NV, was developed to satisfy the need for an accurate positioning system for onshore and offshore. OmniSTAR service offers unprecedented real-time, DGPS positioning. It can improve the accuracy of your GPS receiver by as much as 100 times. If your product or service needs precise positioning information, then chances are good that OmniSTAR can satisfy that need.

OmniSTAR is a high performance DGPS positioning service for land and air applications. The system is characterized by portable receiving equipment, suitable for vehicle mounting or "back-pack" use.

The OmniSTAR system offers superior geographical coverage compared with competing systems in this market sector. OmniSTAR supports applications across a wide range of industries including agriculture (precision farming), mining and land survey. Aerial applications include crop dusting and geophysical surveys.

The OmniSTAR service has significant advantages over terrestrial corrections in that it can provide international coverage with high accuracy (<1m) and stable, repeatable positioning. 

   
  C-Nav DGPS System
 

The C-Nav system is a global, real-time, decimeter accurate GPS system. What we call a GcGPS system (Globally Corrected GPS). C-Nav corrections are not based on traditional pseudo range DGPS. C-Nav is a new concept in GPS positioning, where the accuracy at the mobile location is no longer a function of the distance from the reference station(s).

This application is a product of 10 years of research and development. NASA’s Jet Propulsion Laboratory (JPL) has conducted the majority of this research in their pursuit to provide centimeter accuracy in space. This technology is now being used to provide sub-meter positioning around the world.

C-Nav uses a global network of reference sites strategically located around the world to simultaneously track and monitor the entire GPS constellation. Two independent and redundant, Network Processing Hubs (NPH) are utilized to receive raw, dual frequency GPS, code and phase GPS observable data from the reference sites to calculate orbit and clock corrections for each satellite in the GPS constellation. These corrections are packaged and up-linked to the INMARSAT communication satellites for global broadcast to all C-Nav users in real-time.

The C-Nav GPS receiver applies the received orbit and clock corrections plus the internally computed, dual frequency, refraction corrected pseudo ranges to compute a 3D surface position.

C-Nav GcGPS operates in real time, providing seamless global coverage and decimeter capable positioning in the offshore world, between the latitudes of 75 degrees North and South. A survey crew operating C-Nav is not concerned with distances from reference stations - they are free to operate worldwide.

Traditional DGPS systems experience accuracy and stability errors as the distances between their receivers and reference sites change. C-Nav is a totally new concept in DGPS positioning, providing worldwide accuracies in the order of 25cm (1 sigma).

   
  QINSy Positioning & Navigation Software
  QINSy, a Quality Integrated Navigation System is the standard positioning and navigation software that MGSB used. QINSy has all the necessary characteristics in an integrated and compact solutions for various kind of positioning and navigation tasks.

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Data Acquisition

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Construction and Engineering

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Hydrographic Surveys

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Pipeline Inspection and Pipe Laying

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Barge Management and Rig Moves

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Differential GPS Monitoring

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Harbor Survey and Dredging

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Dynamic Positioning

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High Resolution Seismic and OBC

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Site Surveys


   
 
   
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