GNSS Receivers

Every month we will focus on a specific theme, featuring a selection of articles which have previously been published in Hydro International magazine. By including a mix of older and more recent articles, we will present a complete recap of the subject. Furthermore, we will be bringing you a bi-weekly round-up of ‘Focus Stories’ related to the theme through our newsletter (sign up here). The theme for October 2017 is:

GNSS Receivers

This Technology in Focus on GNSS is important for positioning in hydrographic surveying. Also underwater positioning and inertial navigation often start using by creating a fix with GNSS. This theme includes how-to's, interesting cases of GNSS use and columns. Go to Geo-matching.com to select GNSS Receivers.

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Quality Control of Survey Data

Quality control of survey data is an integral part of any hydrographic survey or inspection operation, but the focus is too often concentrated on the wrong sensors, the carrying out of unnecessary comparisons and ultimately burying real issues in a flood of confusing and con... (read more)
Must Read

Technology in Focus: GNSS Receivers

GNSS has now been operational in the surveying industry, and especially in hydrography, for more than 25 years. Where the first receivers such as the Sercel NR103 (once the workhorse of the industry) boasted 10 parallel GPS L1 channels, current receiver technology has evolve... (read more)
About the Focus Stories

Every month we will focus on a specific theme, featuring a selection of articles which have previously been published in Hydro International magazine. to present a complete recap of the subject. If you don't want to miss these themed recaps, sign up for the newsletter (sign up here).

GNSS Receivers

Global Navigation Satellite Systems

In this feature the current status and future development of four Global Navigation Satellite Systems (GNSS) are briefly presented. These four systems are the American Global Positioning System (GPS), the Russian Glonass, the European Galileo and the Chinese BeiDou Compass.... (read more)

Dynamic Calibration of ­Navigation Sensors Using GNSS Technology

Over the years there has been a requirement to calibrate navigation (heading and motion) sensors and verify DGNSS systems on vessels working in the offshore oil industry. These calibrations are a requirement of oil companies and need to be undertaken prior to commencement of... (read more)

Is Modern Digital Navigation a Profession?

The US Congress passed legislation to preserve national infrastructure as a back-up for GPS on 4 April 2014; spookily the Russian GLONASS system suffered an almost immediate 11 hour outage. This is possibly the first time that an entire GNSS constellation failed - rumours ab... (read more)

Error in GNSS Augmented Heading Systems: Influence of Attitude

My earlier articles on the alignment of motion reference units (MRU) with the ships reference frame (SRF) did not cover the calibration of GNSS augmented heading systems. Although the alignment can be done in the same way as mentioned in the previous articles, GNSS augmented... (read more)
GNSS Receivers

Developments in Highly Accurate Immersed Tunnel Positioning

Netherlands-based positioning specialist Geocon was awarded a contract for the immersion of one of the deepest and longest immersed tunnels in the world, in South Korea’s Jinhae Bay. Together with its sister company, Strukton Immersion Projects, the main contractor for... (read more)

Looking Far beyond the Horizon

These are exciting times in the geomatics and hydrographic industry. Innovative solutions are being developed, integration is the main keyword and the big players are acquiring smaller companies that add a new dimension to their portfolio. Europe, Japan and North America are... (read more)

Guidelines for GNSS ­Positioning

The original UKOOA Guidelines for the use of differential GPS in offshore surveying, published in 1994, were widely used within the offshore survey industry. In 2005, the International Oil & Gas Producers Association (OGP) took over the custodianship of the guidelines fr... (read more)

3D Precision Beyond the Horizon

The Gemini Offshore Wind Farm in the North Sea is located 85km north of Groningen, The Netherlands. Van Oord, a leading Dredging and Marine Contractor, started the offshore construction work in January 2015. Gemini consists of two separate areas called ‘ZeeEnergie&rsqu... (read more)
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