Ordnance Survey Announces GPS Devices

Ordnance Survey (OS) has announced the launch of four new off-road OS GPS navigation devices for walking, hiking and off-road cycling. The innovative GPS units are a first for OS, and have been designed for ease-of-use straight out of the box. They boast the trusted accuracy that you would expect from OS, combined with advanced performance features. Covering the areas you choose, each device comes with up to 12 tiles of OS’s leisure mapping, giving access to up to 8,000 km2 of continually updated maps in either 1:50,000 or 1:25,000 scale. Durable and water resistant, the devices come with features... (read more)
2018-03-27 12:18:58

First GPS III Satellite Reaches Orbit

After extensive delays, the first next-generation GPS III Space Vehicle 01 (GPS III SV01) has been successfully launched and reached medium Earth orbit. GPS III SV01 was lofted aboard a SpaceX Falcon 9 in the last days of 2018. Initially slated for a 2014 launch, GPS III SV01 is the first of ten GPS Block IIIA satellites, the latest generation of the US Air Force’s Global Positioning System. The vehicle’s completion and launch were successively pushed back by delays related to an untested capacitor used in the spacecraft’s construction, and GPS ground system known as the Operational Control Segment. The new... (read more)
2019-01-15 10:17:31

Are you Ready for GPS Week Number Rollover?

The GPS Week Rollover event will occur on 6 April 2019 at 23:59:42 UTC. This will be the second global event of its kind and will affect all users of Global Positioning System (GPS) technology regardless of brand. The last GPS Rollover Week event was in 1999. The next will occur in another 19.7 years. What is GPS Week Rollover? The GPS satellites send a 10-digit binary communication message toward Earth with a ‘week number’ counted from 0000 to 1023. Once the maximum coded week of 1024 is reached (which takes 19.7 years), the week number value resets to 0000.... (read more)
2019-03-19 03:49:54

US Police Officers Look Towards StarChase GPS System for Safer Pursuits

US police officers are trialling a new piece of GPS technology called StarChase to reduce risks associated with pursuits. The StarChase system uses a compressed air launcher mounted in the grille of a police vehicle to launch a GPS device, which adheres to a suspect’s vehicle. The system can then track a suspect’s vehicle in near real time on a secure map. Once tagged, officers can fall back and coordinate a tactical “safe stop” to apprehend the suspect. In 2013, field trials in the US following the introduction of StarChase indicated that law enforcement’s use of the GPS tracking technology... (read more)
2017-10-09 02:36:26

Can Laser Scanning from UAV's Replace Total Station and GPS Surveys

Developments in the field of laser scanners and laser scanning systems have increased in the past few years. Physical size has decreased while performance has increased. The number of laser pulses per second has reached a million and the measurement distance is in the hundreds of metres. RIEGL has implemented these and other features in a variety of compact, powerful, and precise scanners. Attached IMU/GNSS units, governing control units and optional cameras collect/record a multitude of additional properties during each scan. Due to the straightforward attachment system, a quick and easy installation is possible onto helicopters, vehicles and even UAVs... (read more)
2017-05-25 10:39:49

UAV Maps New Zealand Beach to Create Detailed 3D Model

A landslide on Clifton Beach, New Zealand, earlier this year injured two Korean tourists when they were washed out to sea. Following this event, the beach was closed while Hastings District Council undertook a risk assessment. The Surveying Company was contracted to provide data collected by an unmanned aerial vehicle (UAV or 'drone') to assist the council in making public safety decisions regarding access to the Cape. To map the cliff faces they used a combination of RTK GPS and a PPK GPS unit mounted to their UAV. Initially the surveyors concentrated on assessing the main rockfall where the tourists... (read more)
2019-08-06 11:30:42

Thinking Outside the GNSS Receiver Box and Antenna

With so many off-the-shelf GNSS solutions is there still room for innovation? Joël van Cranenbroeck thinks so. One such solution could be based on multiple antennas. But remember, the antenna is still the analogue part that drives the final quality. After decades of research and improvement of GNSS receiver and antenna technology, we have to admit that today solutions are mostly available off the shelf and so you would not expect there to be much room left for innovation. Yet, surprisingly, there are still GNSS applications where there is scope for development. Reliability for Monitoring In geodetic deformation monitoring, for... (read more)
2017-08-24 03:50:22

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

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
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