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.

Most Read

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)
Must Read

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)
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

Technology in Focus: GNSS Receivers

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

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)

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)
GNSS Receivers

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)

GNSS PPP-RTK Workshop and Gravity at Sea Symposium

GNSS PPP-RTK Workshop Hosted by the Offshore and Energy Exhibition at the Amsterdam RAI Conference Centre, the Hydrographic Society Benelux presented the GNSS PPP-RTK workshop in the parallel programme on 14 October 2015. Global Precise Point Positioning (PPP) at decimetre l... (read more)

GNSS Improvements for Offshore Applications

Currently, there are four global navigation satellite systems (GNSS) available: GPS, Glonass, Beidou and Galileo. These satellites can be used directly, but accuracy is greatly improved when using orbit, clock and UPD correction signals. Fugro Satellite Positioning operates... (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)
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