David GNSS Survey Receivers

David GNSS Survey Receivers (read more)

2018-05-25 09:52:05

Richard Groom summarises some of the interesting papers from the FIG Congress focussing on GNSS, Hydrography, 3D Cadastre and mapping. GNSS – Detecting Cycle Slips Roberts and Hancock (TS03E) presented a paper on GNSS observables in a multi-constellation and multi-frequency world. The paper starts with a useful summary of how the systems have developed. Specifically, they look at the range residual and the ionospheric residual – both of which can be used to detect cycle slips. The range residual is the difference between the range calculated using pseudorange and the range calculated from the carrier phase on a specific frequency... (read more)

2018-09-05 04:24:13

Hemisphere GNSS Announce Atlas-capable Multi-GNSS Vector V200

Hemisphere GNSS have announced a single-frequency, multi-GNSS Vector V200 smart antenna with integrated Atlas L-band designed for general marine applications and markets. Powered by Hemisphere's Crescent Vector technology, the V200 is a multi-GNSS compass system that utilizes GPS, GLONASS, BeiDou, Galileo, and QZSS (with future firmware upgrade and activation) for simultaneous satellite tracking to offer heading, position, heave, pitch, and roll output. With support for NMEA 0183 and NMEA 2000, integrating Atlas L-band corrections, and continuing to offer ease of installation, the V200 offers value and performance. The V200 excels in providing accurate position and heading information to autopilots, chart... (read more)

2019-04-16 10:07:09

Hemisphere GNSS Announces Rugged Atlas-capable UAV GNSS Antenna

Hemisphere GNSS has announced the multi-GNSS, multi-frequency 4-helix HA32 UAV antenna. The HA32 is a high-performance antenna that supports GPS, GLONASS, Galileo, BeiDou, Hemisphere’s own Atlas L-band correction service, and was designed specifically for UAVs, GIS, surveying, RTK, and other applications requiring high-precision positioning and navigation. The HA32 is built on an innovative and proprietary 4-helix antenna technology that provides superior filtering and anti-jamming performance with LNA features such as low noise figure of 2.0dB and up to 30dB gain. Suitable for most outdoor and harsh operating environments, the HA32 antenna is sealed in a durable and ruggedized IP67-rated enclosure for protection against... (read more)

2018-05-09 12:57:39

Trimble Announces Forensics GNSS Solution

Trimble has announced the launch of the Trimble Forensics GNSS solution. The solution combines the Trimble T10 tablet or TDC100 handheld with the Trimble Forensics Capture software and the Trimble R4sLE GNSS receiver. The solution enhances forensics fieldwork by improving efficiency and broadening the range of data collection technologies available. The software supports GNSS-based workflows and works with any Trimble R-series receivers. Options for data collection now include GNSS, 3D scanners, total stations and unmanned aerial systems. Key features include: Forensics Capture field software, designed with the help of law enforcement, uses industry terminology and Wizard-based workflows, making it easy... (read more)

2018-11-08 10:30:37

GNSS Receivers – Evolution or Revolution?

Past, Present and Future of Positioning

Satellite surveying… are there any industry professionals out there not using it on (almost) a daily basis? Over the last 30 years, GNSS has become the main positioning instrument for most applications, writes Huibert-Jan Lekkerkerk. Of course, there are still some exceptions where correct relative positioning is needed and dedicated optical systems such as a total station or level instrument are used, but even these are often set up over control points determined using GNSS techniques. This article investigates the developments in GNSS over the last decade and attempts to predict the future. Around a decade ago, a review of... (read more)

2019-01-30 08:43:20

New Book: ‘GNSS Survey & Engineering’

Geomares Education introduces a new book, called ‘GNSS Survey & Engineering’, written by Huibert-Jan Lekkerkerk. 'GNSS Survey & Engineering' is aimed at providing the everyday professional GPS user with enough background information for the understanding and correct operation of satellite navigation equipment in general and particularly GPS. The new book is based on the lectures the author has written for the Skilltrade course in hydrographic surveying as well as a series of articles on satellite navigation systems. Today, GPS is almost synonymous with simple navigation and positioning in nearly all sectors. There are many brands and models to choose from... (read more)

2017-01-25 02:53:49

Carlson Launches Lightweight GNSS Receiver NR3

Carlson has launched a lightweight surveying receiver that utilizes all four constellations and provides triple-frequency tracking. The Carlson NR3 was introduced by Carlson Software President and Founder Bruce Carlson. Weighing just under two pounds, the NR3 delivers highly reliable GNSS RTK for land surveying, GIS, and other data collection uses. Able to be used as a base or rover, the NR3 utilizes all four constellations – GPS, GLONASS, BeiDou, and Galileo – and provides triple-frequency tracking on GPS, GlONASS, and Galileo. Incorporating multipath and ionospheric detection, the NR3 maintains accuracy and continued operation despite shocks, vibration, or other interference. (read more)

2019-06-18 09:58:02

GNSS and the Many Sources of Information

The theme of this issue of Geomatics World is GNSS. Geodesy was once very much in the domain of surveyors but today the use of satellite data for positioning is ubiquitous and with 95% of the population owning a smart phone, most of them will be using GNSS, even if they don't know it, and it is essential for autonomous vehicles. As well as its use by the general public, GNSS is an essential tool for geospatial surveyors as demonstrated in the articles on highway construction and canal maintenance. GNSS is also necessary for operating drones and mobile mapping systems.... (read more)

2018-09-17 03:49:55

OS Net - Preparations for Future GNSS

Ordnance Survey (OS) has just updated its geodetic infrastructure. Mark Greaves, Lead Consultant at Geodesy, describes these developments and takes a look at shorter and longer-term geodetic issues for surveyors. OS Net is Ordnance Survey's national network of over 110 permanent, geodetic quality, GNSS stations. GNSS observation data is streamed in real-time to a central hub and access to the national standard realisation of ETRS89 is enabled through the following services: Real-time GNSS correction services available to customers of OS Net commercial partners. Real-time GNSS correction services for OS surveyors. High rate (i.e. 1Hz) RINEX data for use in commercial... (read more)

2018-09-18 12:01:49